Ericsson Internal
PRODUCT SPECIFICATION 1 (5)
Prepared (also subject responsible if other) No.
EZHIXZH 1/1301- BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2015-05-13 C
Key Features
Advanced Bus Converter Industry standard Eighth-brick
with digital PMBus interface
58.4 x 22.7 x 10.2 mm (2.30 x 0.89 x 0.40 in.)
Optional industr y standard 5- pins for intermediate bus
architectures
Industry-leading Power Density for Telecom and
Datacom 129-147W / sq. in
Ericsson DC/DC Energy Optimizer built-in
High efficiency, typ. 95.2% at half load, 12 Vout
Fully regulated Advanced Bus Converter from 36-75Vin
2250 Vdc input to output isolation
Fast Feed forward regulation t o mana ge line transients
Optional baseplate for high temperature applications
Droop Load Sharing with 10% current share accuracy
PMBus Revision 1.2 compliant
2.9 million hours MTBF
ISO 9001/14001 certified supplier
Power Management
Configurable soft start/stop
Precision delay and ramp-up
Voltage margining
Voltage/current/temperature monitoring
Wide output voltage range
Configurable protection features
Safety Approvals Design for Environment
Meets requirements in high-
temperature lead-free soldering
processes
Ericsson Internal
TABLE OF CONTENTS 1 (2)
Prepared (also subject responsible if other) No.
SEC/S Kevin Zhou 00152-FGC1011835
Approved Checked Date Rev Reference
SEC/S Kevin Zhou 2012-08-24 C
Contents
Ordering Information .............................................................2
General Information .............................................................2
Safety Specification .............................................................4
Absolute Maximum Ratings .............................................................5
Electrical Specification
12 V, 22 A / 264 W (36-75Vin) BMR 457 0004/001............................... 7
12 V, 25 A / 300 W (40-60Vin) BMR 457 0000/002............................. 11
12.45 V, 22 A / 261 W (36-75Vin) BMR 457 0007/014............................. 15
12.45 V, 25 A / 296 W (40-60Vin) BMR 457 0011/017............................. 18
EMC Specification ........................................................... 21
Operating Information ...........................................................22
Thermal Consideration ........................................................... 25
Connections ...........................................................26
PMBus Interface ...........................................................27
Mechanical Information ...........................................................30
Soldering Information ...........................................................33
Delivery Information ...........................................................34
Product Qualification Specification ........................................................... 36
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
Ericsson Internal
PRODUCT SPECIFICATION 2 (5)
Prepared (also subject responsible if other) No.
EZHIXZH 1/1301- BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2015-05-13 C
Ordering Information
Product program Vin Output
BMR4570004/001 36 – 75 12 V / 22 A, 264 W
BMR4570007/013 36 – 75 12 V / 22 A, 251 W
BMR4570007/014 36 – 75 12.45 V / 22 A, 261 W
BMR4570000/002 40
–
60 12 V / 25 A, 300 W
BMR4570011/016 40 - 60 12 V / 25 A, 285 W
BMR4570011/017 40 - 60 12.45 V / 25 A, 296 W
Product Number and Packaging
BMR457 n1n2n3n4 /n5n6n7
Options n1 n2 n3 n4 / n5 n6 n7
Mechanical pin
option x /
Mechanical
option x /
Hardware option x x /
Configuration file / x x x
Optional
designation Description
n1
n2
n3 n4
n5 n6 n7
0 = Standard pin length 5.33 mm
1 = Surface mount option note 1
2 = Lead length 3.69 mm(0.145 in.) (cut)
3 = Lead length 4.57 mm(0.180 in.) (cut)
4 = Lead length 2.79 mm(0.110 in.) (cut)
0 = Open frame
1 = Baseplate
00 = 40-60 Vin, 6.9-13.2 Vout adjusted, with
digital interface
01 = 40-60 Vin, 6.9-13.2 Vout adjusted, without
digital interface
04 = 36-75 Vin, 6.9-13.2 Vout adjusted, with
digital interface
05 = 36-75 Vin, 6.9-13.2 Vout adjusted, without
digital interface
06 = 36-75 Vin, 6.9-13.2 Vout adjusted, Droop
load sharing function for parallel operation,
without digital interface
07 = 36-75 Vin, 6.9-13.2 Vout adjusted, Droop
load sharing function for parallel operation, with
digital interface
11 = 40-60 Vin, 6.9-13.2 Vout adjusted, Droop
load sharing function for parallel operation, with
digital interface
12 = 40-60 Vin, 6.9-13.2 Vout adjusted, Droop
load sharing function for parallel operation,
without digital interface
001 = 12 V Standard configuration for 36-75
Vin, n3n4 = 04 or 05
Packaging
002 = 12 V Standard configuration for 40-60
Vin, n3n4 = 00 or 01
008 = 12 V with positive RC logic configuration
for 36-75 Vin, n3n4 = 04 or 05
009 = 12 V with positive RC logic configuration
for 40-60 Vin, n3n4 = 00 or 01
013 = 12 V with 0.6 V droop load sharing
function configuration (36-75 Vin, n3n4 = 06 or
07)
014 = 12.45 V with 0.6V droop load sharing
function configuration (36-75 Vin, n3n4 = 06 or
07)
016 = 12 V with 0.6 V droop load sharing
function configuration (40-60 Vin, n3n4 = 11 or
12)
017 = 12.45 V with 0.6V droop load sharing
function configuration (40-60 Vin, n3n4 = 11 or
12)
xxx = Application Specific Configuration
25 converters(through hole pin)/tray, PE foam
dissipative
20 converters(surface mount pin)/tray,
Antistatic PPE
Example: Product number BMR4572004/001 equals an Through hole mount
lead length 3.69 mm (cut), open frame, digital interface with 12 V standard
configuration variant.
Note 1: No baseplate option
For application specific configurations contact your local Ericsson Power
Modules sales representative.
General Information
Reliability
The failure rate () and mean time between failures
(MTBF= 1/) is calculated at max output power and an
operating ambient temperature (TA) of +40°C. Ericsson
Power Modules uses Telcordia SR-332 Issue 2 Method 1 to
calculate the mean steady-state failure rate and standard
deviation ().
Telcordia SR-332 Issue 2 also provides techniques to
estimate the upper confidence leve ls of failure rates based
on the mean and standard deviation.
Mean steady-state failure rate, Std. deviation,
421 n Failures/h 60.9 nFailures/h
MTBF (mean value) for the BMR457 series = 2.91 Mh.
MTBF at 90% confidenc e level = 2.37 Mh
Compatibility with RoHS requirements
The products are compatible wit h the rel evant clauses and
requirements of the RoHS directive 2011/65/EU and have a
maximum concentration value of 0.1% b y weight in
homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
2
Ericsson Internal
PRODUCT SPECIFICATION 3 (5)
Prepared (also subject responsible if other) No.
EZHIXZH 1/1301- BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2015-05-13 C
homogeneous materials for cadmi um.
Exemptions in the RoHS directive utilized in Ericsson
Power Modules products are found in the Statement of
Compliance document.
Ericsson Power Modules fulfills and will continuously fulfill
all its obligations under regulation (EC) No 1907/2006
concerning the registration, evaluation, authorization and
restriction of chemicals (REACH) as they enter into force
and is through product materials dec larations preparing for
the obligations to communicate information on substances
in the products.
Quality Statement
The products are designed and manufactured in an
industrial environment where quality systems and methods
like ISO 9000, Six Sigma, and SPC are inten sively in use to
boost the continuous improvements strateg y. Infant
mortality or early failures in the prod ucts are screened out
and they are subjected to an ATE-based final test.
Conservative design rules, design reviews and product
qualifications, plus the high competence of an engaged
work force, contribute to the high quality of the products.
Warranty
Warranty period and conditions are defined in Ericsson
Power Modules General Terms and Conditi ons of Sale.
Limitation of Liability
Ericsson Power Modules does not make any other
warranties, expressed or impli ed including any warranty of
merchantability or fitness for a particular purp ose (including,
but not limited to, use in life support applications, where
malfunctions of product can cause i njury to a person’s
health or life).
© Ericsson AB 2015
The information and specifications in this technical
specification is believed to be correct at the time of
publication. However, no liabil ity is accepted for
inaccuracies, printing errors or for any consequences
thereof. Ericsson AB reserves the right to change the
contents of this technical specification at any time without
prior notice.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
3
Ericsson Internal
PRODUCT SPECIFICATION 4 (5)
Prepared (also subject responsible if other) No.
EZHIXZH 1/1301- BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2015-05-13 C
Safety Specification
General information
Ericsson Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with the safety
standards IEC 60950-1, EN 60950-1 a nd UL 60950-1
Safety of Information Technology Equipment.
IEC/EN/UL 60950-1 contains requirements to prevent injury
or damage due to the following hazar ds:
Electrical shock
Energy hazards
Fire
Mechanical and heat hazards
Radiation hazards
Chemical hazards
On-board DC/DC converters and DC/DC regulators are
defined as component power supplies. As components
they cannot fully comply with the provisions of any safety
requirements without “conditions of acceptability”.
Clearance between conductors and between conductive
parts of the component power supply and conductors on
the board in the final product must meet the applicable
safety requirements. Certain conditions of acceptabilit y
apply for component po wer supplies with limited stand-off
(see Mechanical Information for further information). It is
the responsibility of the installer to ensure that the final
product housing these compo nents complies with the
requirements of all applicable safety standards and
regulations for the final product.
Component power supplies for general use should comply
with the requirements in IEC/EN/UL 60950-1 Safety of
Information Technology Equipment. Product related
standards, e.g. IEEE 802.3af Power over Ethernet, and
ETS-300132-2 Power interface at the input to telecom
equipment, operated by direct current (dc) are based on
IEC/EN/UL 60950-1 with regards to safety.
Ericsson Power Modules DC/DC converters and DC/DC
regulators are UL 60950-1 recognized and certified in
accordance with EN 60950-1. The flammability rating for all
construction parts of the products meet requirements for
V-0 class material according to IEC 60695-11-10, Fire
hazard testing, test flames – 50 W horizontal and vertical
flame test methods.
Isolated DC/DC converters
Galvanic isolation between input and output is verified in an
electric strength test and the isolation voltage (Viso) meets
the voltage strength requirement for basic insulation
according to IEC/EN/UL 60950-1.
It is recommended to use a slo w blo w fuse at the input of
each DC/DC converter. If an input filter is used in the circuit
the fuse should be placed in front of the input filter. In the
rare event of a component problem that imposes a short
circuit on the input source, this fuse will provide the
following functions:
Isolate the fault from the input power source so as not
to affect the operation of other parts of the system
Protect the distribution wiring f r om excessive current
and power loss thus preventing hazardous overheating
The DC/DC converter output is considered as safety extra
low voltage (SELV) if one of the follo wing conditions is met:
The input sour ce has double or reinforced insulati on
from the AC mains according to IEC/EN/UL 60950-1
The input sour ce has basic or supplementary insulation
from the AC mains and the input of the DC/DC
converter is maximum 60 Vdc and connected to
protective earth according to IEC/EN/UL 60950- 1
The input sour ce has basic or supplementary insulation
from the AC mains and the DC/DC converter output is
connected to protective earth according to
IEC/EN/UL 60950-1
Non - isolated DC/DC regulators
The DC/DC regulator output is SELV if the input source
meets the requirements for SELV circuits accordi ng to
IEC/EN/UL 60950-1.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
4
Absolute Maximum Ratings
Characteristics
min
typ
max
Unit
Operating Temperature (see Thermal Considerati on secti on)
-40
+125
°C
T
S
Storage tem perature
-55
+125
°C
VI Input v oltage -0.5
+80
+65* V
C
out
Output capacitance
100
µF
Viso
Isolation voltage (input to output test voltage)
2250
Vdc
V
iso
I solation voltage (input to baseplate qualification test voltage)
750
Vdc
V
iso
I solation voltage (baseplate to output qualification test voltage)
750
Vdc
Vtr I nput voltage transient according to E T SI E N 300 132-2 and T elcordia GR-1089-
CORE +100
+80* V
VRC
Remote Control pin voltage
(see Operati ng Information section) -0.3 18 V
V
Logic I/O
SAL ERT, CTRL , SCL , SDA, S A0 , S A1
-0.3
3.6
V
S tr e ss i n e xce ss o f A b so l u te Maxi mu m Ra ti n gs may cause permanent damage. Absolute M aximum Ratings, sometimes referred to as no destruction limits, are
normally tested w ith one parameter at a time exceeding the limits in the Electrical Specification. If exposed to stress above th e se l i mi ts, fu n cti o n and performance
m ay degrade in an uns pec ified m anner.
*) Apply for the narrow input version VI= 4 0-60 V.
Fundamental Circuit Diagram
-IN
+IN
+OUT
-OUT
Driver
Driver
Control
R C isol ation
Auxillary
Supply
RC
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
5
Functional Description
T
P1
, T
P3
= -40 to +90ºC, V
I
= 36 to 75 V, sense pins connected to output pins unless otherwise specified under C onditions.
Typical values given at: TP1, TP3 = +25°C, VI= 53 V, m ax I O , unless otherwise specified under Conditions
Configuration F ile: 190 10-CDA 102 0315/001
Characteristics
Conditions
min
typ
m ax
Unit
PMBus monitoring accuracy
VIN_READ
Input v oltage
-2
±0.5
2
%
VOUT_READ
Output voltage
V
I
= 53 V
-1.0
±0.1
1.0
%
IOUT_READ Output current
V
I
= 53 V, 50-100% of m ax I
O
-6
±1.5
6
%
VI = 53 V, 10% of m ax I O
-0.6
-
0.6
A
TEMP_READ
Temperature
Controll er IC internal sensor
0
5
10
ºC
Fault Protection Characteristics
Input Under Voltage
Lockout,
UVLO
Factory default
-
32
-
V
Setpoint accuracy
0
0.5
1
V
Hysteresis
Factory default
-
2
-
V
C onfigurable via PMBus of
threshold range, Note 1 0 - - V
Delay
-
300
-
μ
s
(O utput voltage)
Over/Under Voltage
Protection,
OVP/UVP
VOUT_UV_FAULT_LIMIT
Factory default
-
0
-
V
C onfigurable via P M Bus, Note 1
0
-
16
V
VOUT_OV_FAULT_LIMIT
Factory default
-
15.6
-
V
C onfigurable via P M Bus, Note 1
V
OUT
-
16
V
fault response tim e
-
200
-
μs
Over Current
Protection,
OCP
Setpoint accuracy
Io
-6
6
%
IOUT_OC_FAULT_LIMIT
Factory default
-
25
-
A
C onfigurable via P M Bus, Note 1
0
-
100
fault response tim e
-
200
-
μs
Over Tem perature
Protection,
OTP
OTP_FAULT_LIMIT
Factory default
-
125
-
°C
C onfigurable via P M Bus, Note 1
-50
125
OTP hysteresis
Factory default
10
C onfigurable via P M Bus, Note 1
0
125
fault response tim e
-
300
-
μs
Logic Input/Output Characteristics
Logic input low (VIL)
CTRL, SA 0, SA1, P G, SCL, SDA ,
-
-
1.1
V
Logic input high (V
IH
)
2.1
-
-
V
Logic output low (VOL)
CTRL, PG, SALERT, SCL, SDA
IOL = 6 mA
- - 0.25 V
Logic output high (VOH)
CTRL, PG, SALERT, SCL, SDA
IOH = -6 mA
2.7 - - V
Bus free tim e T(BU F)
Note 2
1.3
-
us
Note 1: See Operati ng Infor mati on s ecti on.
Note 2: PM Bus ti mi ng par ameter s accor di ng to PM Bus spec .
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
6
Electrical Specification
12 V, 22 A, 264 W
BMR457 0004/001
T
P1
= -40 to +90ºC, V
I
= 36 to 75V, sense pins connected to output pins unless otherwise specified under C onditions.
Typical values given at: TP1 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions.
Additional Cin= 0.1 mF, Cout = 0.1 mF. See Operating I nform ation section for selection of capacitor types.
C onfiguration F ile: 19010-CD A 102 0315/001
Characteristics
Conditions
min
typ
max
Unit
VI
I nput voltage range
36
75
V
V
Ioff
Turn-off input voltage
D ecreasing input voltage
32
33
34
V
V
Ion
Turn-on input voltage
I ncreasing input voltage
34
35
36
V
C
I
Internal input capacitance
11
μF
P
O
Output power
0
264
W
η Efficiency
50% of m ax I
O
94.7
%
max I
O
94.5
50% of m ax I
O
, V
I
= 48 V
95.2
max I
O
, V
I
= 48 V
94.8
Pd
P ower Dissipation
max IO
15.5
22
W
P
li
Input idling power
I
O
= 0 A, V
I
= 53 V
3.5
W
P
RC
I nput standby power
V
I
= 53 V (turned off with R C )
0.4
W
fs
Default sw itching frequency
0-100 % of max IO
171
180
189
kHz
VOi
Output voltage initial setting and
accuracy
TP1 = +25°C , VI = 53 V, I O = 12 A 11.88 12.0 12.12 V
VO
Output adjust range
See operating inform ation
6.9
13.2
V
Output voltage tolerance band
0-100 % of max I
O
11.76
12.24
V
Idling voltage
I
O
= 0 A
11.88
12.12
V
Line regulation
max I
O
100
200
mV
Load regulation
V
I
= 53 V, 1-100 % of max I
O
30
100
mV
Vtr
Load transient
voltage deviation
VI = 53 V, Load step 25-75-25% of
max IO, di/dt = 1 A/μs, Cout = 2.2 mF
OSCON type
±350 mV
t
tr
Load transient recovery tim e
200
µs
tr
Ramp-up time
(f rom 10−90% of VOi)
10-100 % of max IO 8 ms
ts
Start-up tim e
(from VI connection to 90% of VOi)
23 ms
tf
V
I
shut-down fall tim e
(from VI off to 10% of VO)
max IO
0.7
ms
IO = 0 A
6
s
tRC
RC st a r t -up tim e
max I
O
12
ms
RC sh ut -dow n fall time
(from RC off to 10% of VO)
max I
O
3
ms
I
O
= 0 A
6
s
I
O
Output current
0
22
A
Ilim
Current l imit threshold
VO = 10.8 V, TP1 < max TP1
24
25
26
A
I
sc
Short circuit current
T
P1
= 25ºC , see Note 1
1.1
A
C
out
Recommended Capaciti ve Load
T
P1
= 25ºC, see Note 2
0
2.2
6
mF
VOac
Output ripple & noise
See ripple & noise section, VOi
50
100
mVp-p
OVP Over voltage protection
T
P1
= +25°C, V
I
= 53 V, 10-100 % of
max IO
15.6 V
RC
Sink current, see N ote 3
See operating inform ation
0.7
mA
Trigger l evel
D ecreasing / I ncreasing R C-voltage
2.6/2.9
V
Note 1: OCP in hic-up mode
Note 2: Low ESR -value
Note 3: Si nk c ur r ent dr awn by exter nal devi ce c onnected t o the R C pi n. M i ni mum s i nk c ur r ent r equi r ed to guar ant ee acti vated R C func tion.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
7
Typical Characteristics
12 V, 22 A, 264 W
BMR 457 0004/ 001
Efficiency
Power Dissipation
75
80
85
90
95
100
0 5 10 15 20 25
[A]
[%]
36 V
48 V
53 V
75 V
0
4
8
12
16
20
0 5 10 15 20 25
[A]
[W]
36 V
48 V
53 V
75 V
Efficiency vs. load current and input voltage at T
P1
= +25 °C.
Dissipated pow er vs. load current and input voltage at
TP1 = +25 ° C .
Output Characteristics
Current Limit Characteristics
11.80
11.90
12.00
12.10
12.20
0 5 10 15 20 25
[A]
[V]
36 V
48 V
53 V
75 V
0.00
3.00
6.00
9.00
12.00
15.00
15 18 21 24 27
[A]
[V]
36 V
48 V
53 V
75 V
Output voltage vs. load current at T
P1
= +25 ° C.
Output voltage vs. load current at I
O
> ma x I
O
, T
P1
= +25 ° C.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
8
Typical Characteristics
12 V, 22 A, 264 W
BMR 457 0004/ 001
Start-up
Shut-down
Start-up enabled by connecting V
I
at:
TP1 = +25°C, VI = 53 V,
IO = 22 A resistive load.
T op tr ac e: output vol tag e (5 V/div).
Bottom tr ac e: i nput voltage ( 50 V/ div) .
T i me sc al e: ( 5 mS/div)
Shut-down enabled by disconnecting V
I
at:
TP1 = +25°C, VI = 53 V,
IO = 22 A resistive load.
T op tr ac e: output vol tag e ( 5 V/div).
Bottom tr ac e: i nput voltage (
50 V/di v) .
T i me sc al e: (
2 mS/div).
Output Ripple & Noise
Output Load Transient Response
Output voltage ripple at:
TP1 = +25°C, VI = 53 V,
IO = 22 A resistive load.
Trace: output voltage (20 mV/di v).
T i me sc al e: (
2 uS/div ).
Output voltage response to load current step-
c hang e ( 5.5 – 16.5 – 5.5 A) at:
TP1 = + 25°C , VI = 53 V. CO = 2.2 mF.
T op tr ac e: output voltage (0.5 V/di v).
Bottom trace:
l oad cur r ent ( 5 A/ div) .
T i me sc al e:
( 0.5 mS/di v)
Input Voltage Transient Response
Output voltage response to input voltage
transient at: TP1 = +25°C, VI = 36-75 V,
IO = 11 A resistive load, CO = 2.2 mF
T op tr ac e: output voltage (2 V/div.).
Bottom tr ac e: i nput voltage ( 20 V/ div.) .
T i me sc al e: ( 0.5 m
s/div.).
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
9
Typical Characteristics
12 V, 22 A, 264 W
BMR 457 0004/ 001
Output Current Derating – Open frame
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
Output Current Derating – Base plate
Thermal Resistance – Base plate
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
1
2
3
4
5
6
0.0 0.5 1.0 1.5 2.0 2.5 3.0
[m/s]
[°C/W]
Available load current vs. ambient air t em perat ure and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
T hermal resistance vs. airspeed measured at the converter. Tested in
wind t unnel with airflow and tes t c ondit ions as per t he Therm al
consideration section. VI = 53 V.
Output Current Derating – Base plate + Heat sink
Output Current Derating – Cold wall sealed box
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
5
10
15
20
25
020 40 60 80 100
[°C]
A
Tamb
85°C
Available load current vs. base plate temperature.
VI = 53 V. See Therm al C ons iderat ion s ec t ion. Tes t ed with Plat e F in
T ransverse heatsink, height 0.23 In, P0114 T hermal Pad.
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
10
Electrical Specification
12 V, 25 A, 300 W
BMR457 0000/002
T
P1
= -40 to +90ºC, V
I
= 40 to 60 V, sense pins connected to output pins unless otherw ise specified under C onditions.
Typical values given at: TP1 = +25°C, V I= 53 VI max IO, unless otherw ise specified under C onditions.
Additional Cin= 0.1 mF, Cout = 0.1 mF. See Operating Inform ation section for selection of capacitor types.
C onfiguration F ile: 19010-CDA1020315/002
Characteristics
Conditions
min
typ
max
Unit
VI
I nput voltage range
40
60
V
V
Ioff
Turn-off input voltage
D ecreasing input voltage
36
37
38
V
V
Ion
Turn-on input voltage
I ncreasing input voltage
38
39
40
V
C
I
Internal input capacitance
11
μF
P
O
Output power
0
300
W
η Efficiency
50% of m ax I
O
95.2
%
max I
O
94.6
50% of m ax I
O
, V
I
= 48 V
95.1
max I
O
, V
I
= 48 V
94.5
Pd
P ower Dissipation
max IO
17
24
W
P
li
Input idling power
I
O
= 0 A, V
I
= 53 V
4.4
W
P
RC
Input s tandby power
V
I
= 53 V (turned off with R C )
0.4
W
fs
Switching frequency
0-100 % of max IO
180
kHz
VOi
Output voltage initial setting and
accuracy
TP1 = +25°C , VI = 53 V, I O = 12 A 11.88 12.00 12.12 V
VO
Output adjust range
See operating inform ation
6.9
13.2
V
Output voltage tolerance band
0-100 % of max I
O
11.76
12.24
V
Idling voltage
I
O
= 0 A
11.88
12.12
V
Line regulation
max I
O
50
220
mV
Load regulation
V
I
= 53 V, 1-100 % of max I
O
45
100
mV
Vtr
Load transient
voltage deviation
VI = 53 V, Load step 25-75-25% of
max IO, di/dt = 1 A/μs Cout = 2.5 mF
OSCON type
±300 mV
t
tr
Load transient recovery tim e
250
µs
tr
Ramp-up time
(f rom 10−90% of VOi)
10-100 % of max IO 8 ms
ts
Start-up tim e
(from VI connection to 90% of VOi)
23 ms
tf
V
I
shut-down fall tim e
(from VI off to 10% of VO)
max IO
0.7
ms
IO = 0 A
6
s
tRC
RC st a r t -up tim e
max I
O
14
ms
RC sh ut -dow n fall time
(from RC off to 10% of VO)
max I
O
4
ms
I
O
= 0 A
6
s
I
O
Output current
0
25
A
Ilim
Current limit threshold
TP1 < max TP1
27
30
33
A
I
sc
Short circuit current
T
P1
= 25ºC , see Note 1
1.1
A
C
out
Recommended Capaciti ve Load
T
P1
= 25ºC, see Note 2
0
2.5
10
mF
VOac
Output ripple & noise
See ripple & noise section, VOi
70
140
mVp-p
OVP Over voltage protection
T
P1
= +25°C, V
I
= 53 V, 10-100 % of
max IO
15.6 V
RC
Sink current, see N ote 3
See operating inform ation
0.7
mA
Trigger l evel
See operating inform ation
2.6/2.9
V
Note 1: OCP in hic-cup mode
Note 2: Low ESR-value
Note 3: Sin k cur r ent dr awn by exter nal devi ce connected t o the R C pi n. M i ni mum s i nk c ur r ent r equi r ed to guarantee activated RC function.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
11
Typical Characteristics
12 V, 25 A, 300 W
BMR 457 0000/002
Efficiency Power Dissipation
75
80
85
90
95
100
0 5 10 15 20 25
[A]
[%]
40 V
53 V
60 V
0
4
8
12
16
20
0 5 10 15 20 25
[A]
[W]
40 V
53 V
60 V
Efficiency vs. load current and input voltage at T
P1
= +25 °C.
Dissipated pow er vs. load current and input voltage at
TP1 = +25 ° C .
Output Characteristics
Current Limit Characteristics
11.80
11.90
12.00
12.10
12.20
0 5 10 15 20 25 30
[A]
[V]
40 V
53 V
60 V
0.00
3.00
6.00
9.00
12.00
15.00
15 20 25 30 35
[A]
[V]
40 V
53 V
60 V
Output voltage vs. load current at T
P1
= +25 ° C.
Output voltage vs. load current at I
O
> ma x I
O
, T
P1
= +25 ° C.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
12
Typical Characteristics
12 V, 25 A, 300 W
BMR 457 0000/ 002
Start-up
Shut-down
Start-up enabled by connecting V
I
at:
TP1 = +25°C, VI = 53 V,
IO = 25 A resistive load.
T op tr ac e: output vol tag e (5 V/div).
Bottom tr ac e: i nput voltage ( 50 V/di v) .
T i me sc al e: ( 10 mS/di v)
Shut-down enabled by disconnecting V
I
at:
TP1 = +25°C, VI = 53 V,
IO = 25 A resistive load.
T op tr ac e: output vol tag e ( 5 V/div).
Bottom tr ac e: i nput voltage (
20 V/di v) .
T i me sc al e: (
1 mS/div).
Output Ripple & Noise
Output Load Transient Response
Output voltage ripple at:
TP1 = +25°C, VI = 53 V,
IO = 25 A resistive load.
Trace: output voltage (20 mV/di v).
T i me sc al e: (
2 uS/div ).
Output voltage response to load current step-
c hang e ( 6.25-18.75 -6.25 A) at:
TP1 = + 25°C , VI = 53 V.
T op tr ac e: Output voltage (500 mV/di v).
Bottom trace:
l oad cur r ent ( 10 A/div).
T i me s
cale: (0.5 mS/div)
Input Voltage Transient Response
Output voltage response to input voltage
transient at: TP1 = +25°C, VI = 40-60 V,
IO = 25 A resistive load, CO = 3.3 mF
T op tr ac e: output vol tag e ( 2 V/ div.) .
Bottom tr ac e: i nput voltage ( 20 V/ di
v.).
T i me sc al e: ( 0.5 ms /di v. ) .
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
13
Typical Characteristics
12 V, 25 A, 300 W
BMR 457 0000/ 002
Output Current Derating – Open frame
0
5
10
15
20
25
0 20 40 60 80 100 [°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
Output Current Derating – Base plate
Thermal Resistance – Base plate
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
1
2
3
4
5
6
0.0 0.5 1.0 1.5 2.0 2.5 3.0
[m/s]
[°C/W]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Thermal Cons iderat ion s ec t ion.
T hermal resistance vs. airspeed measured at the converter. Tested in
wind t unnel with airflow and tes t c ondit ions as per t he Therm al
consideration section. VI = 53 V.
Output Current Derating – Base plate + Heat sink
Output Current Derating – Cold wall sealed box
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
5
10
15
20
25
30
020 40 60 80 100
[°C]
[A]
Tamb
85°C
Available load current vs. base plate temperature.
VI = 53 V. See Therm al C ons iderat ion s ec t ion. Tes t ed with Plat e F in
T ransverse heatsink, height 0.23 In, P0114 T herm al Pad.
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
14
Electrical Specification
12.45 V, 22 A, 261 W
BMR457 0007/014
T
P1
= -40 to +90ºC, V
I
= 36 to 75V, sense pins connected to output pins unless otherwise specified under C onditions.
Typical values given at: TP1 = +25°C, VI = 53 V, max IO, unless otherwise specified under Conditions.
Additional Cin= 0.1 mF, Cout = 0.1 mF. See Operating I nform ation section for selection of capacitor types.
C onfiguration F ile: 19010-CD A 102 0315/014
Characteristics
Conditions
min
typ
max
Unit
VI
I nput voltage range
36
75
V
V
Ioff
Turn-off input voltage
D ecreasing input voltage
32
33
34
V
V
Ion
Turn-on input voltage
I ncreasing input voltage
34
35
36
V
C
I
Internal input capacitance
11
μF
P
O
Output power
0
261
W
η Efficiency
50% of m ax I
O
94.7
%
max I
O
94.5
50% of m ax I
O
, V
I
= 48 V
95.2
max I
O
, V
I
= 48 V
94.8
Pd
P ower Dissipation
max IO
15.3
21
W
P
li
Input idling power
I
O
= 0 A, V
I
= 53 V
3.5
W
P
RC
Input s tandby power
V
I
= 53 V (turned off with R C )
0.4
W
fs
Default sw itching frequency
0-100 % of max IO
171
180
189
kHz
VOi
Output voltage initial setting and
accuracy
TP1 = +25°C , VI = 53 V, I O = 0 A 12.415 12.45 12.485 V
VO
Output adjust range
See operating inform ation
6.9
13.2
V
Output voltage tolerance band
0-100 % of max I
O
11.5
12.7
V
Line regulation
max I
O
100
250
mV
Load regulation
V
I
= 53 V, 1-100 % of max I
O
450
600
700
mV
Vtr
Load transient
voltage deviation
V
I
= 53 V, Load step 25-75-25% of
max IO, di/dt = 1 A/μs, Cout = 2.2 mF
OSCON type
±350 mV
t
tr
Load transient recovery tim e
200
µs
tr
Ramp-up time
(f rom 10−90% of VOi) 10-100 % of max IO 23 ms
ts
Start-up tim e
(from VI connection to 90% of VOi)
38 ms
tf
V
I
shut-down fall tim e
(from VI off to 10% of VO)
max IO
0.7
ms
IO = 0 A
6
s
tRC
RC st a r t -up tim e
max I
O
26
ms
RC sh ut -dow n fall time
(from RC off to 10% of VO)
max I
O
3.5
ms
I
O
= 0 A
6
s
I
O
Output current
0
22
A
I
lim
Current l imit threshold
V
O
= 10.8 V, T
P1
< max T
P1
24
25
26
A
Isc
Short circuit current
TP1 = 25ºC , see Note 1
7
A
C
out
Recommended Capaciti ve Load
T
P1
= 25ºC, see Note 2
0
2.2
6
mF
V
Oac
Output ripple & noise
See ripple & noise section, V
Oi
50
150
mVp-p
OVP Over voltage protection
T
P1
= +25°C, V
I
= 53 V, 10-100 % of
max IO 15.6 V
RC
Sink current, see N ote 3
See operating inform ation
0.7
mA
Trigger l evel
D ecreasing / I ncreasing R C-voltage
2.6/2.9
V
Note 1: OCP in hic-up mode
Note 2: Low ESR -value
Note 3: Sin k cur r ent dr awn by exter nal devi ce connected t o the R C pi n. M i ni mum s i nk c ur r ent r equi r ed to guar ant ee acti vated R C func ti on.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
15
Typical Characteristics
12.45 V, 40 A / 476 W, two products in parallel
2 × BMR 457 0007/014
Efficiency
Power Dissipation
75
80
85
90
95
100
010 20 30 40
[A]
[%]
36 V
48 V
53 V
75 V
0
5
10
15
20
25
30
35
40
45
010 20 30 40
[A]
[W]
36 V
48 V
53 V
75 V
Efficiency vs. load current and input voltage at T
P1
= +25°C
Dissipated pow er vs. load current and input voltage at
TP1 = +2 5°C
Output Characteristics
Current Limit Characteristics
11.8
11.9
12.0
12.1
12.2
12.3
12.4
12.5
12.6
010 20 30 40
[A]
[V]
36 V
48 V
53 V
75 V
3.0
5.0
7.0
9.0
11.0
13.0
40 42 44 46 48 50 52
[A]
[V]
36 V
48 V
53 V
75 V
Output voltage vs. load current at T
P1
, T
P3
= +25 ° C
Output voltage vs. load current at I
O
> ma x I
O
, T
P1
, T
P3
= +25 ° C
Start-up
Output Load Transient Response
Start-up enabled by connecting V
I
at:
TP1 = +25°C, VI = 53 V,
IO = 40 A resistive load.
T op tr ac e: output vol tag e ( 5 V/ div.) .
Bottom tr ac e: i nput voltage (
50 V/di v.) .
T i me sc al e: (
20 ms/di v. ) .
Output voltage response to load current
step
-change (10-30-10 A) at:
T
P1= + 25° C , VI = 53 V, CO = 2.2 mF.
T op trace: output voltage (0.5 V/div.).
Bottom tr ac e: output c ur r ent ( 20 A/di v.) .
T i me sc al e: (
0.5 ms/div.).
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
16
Typical Characteristics
12.45 V, 22 A, 261 W
BMR 457 0007/ 014
Output Current Derating – Open frame
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
Output Current Derating – Base plate
Thermal Resistance – Base plate
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
1
2
3
4
5
6
0.0 0.5 1.0 1.5 2.0 2.5 3.0
[m/s]
[°C/W]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
T hermal resistance vs. airspeed measured at the converter. Tested in
wind t unnel with airflow and tes t c ondit ions as per t he Therm al
consideration section. VI = 53 V.
Output Current Derating – Base plate + Heat sink
Output Current Derating – Cold wall sealed box
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
5
10
15
20
25
020 40 60 80 100
[°C]
A
Tamb
85°C
Available load current vs. base plate temperature.
VI = 53 V. See Therm al C ons iderat ion s ec t ion. Tes t ed with Plat e F in
T ransverse heatsink, height 0.23 In, P0114 T hermal Pad.
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
17
Electrical Specification
12.45 V, 25 A, 296 W
BMR457 0011/017
T
P1
= -40 to +90ºC, V
I
= 40 to 60 V, sense pins connected to output pins unless otherw ise specified under conditions.
Typical values given at: TP1 = +25°C, VI = 53 V, max IO,, unless otherw ise specified under conditions.
Additional Cin= 0.1 mF, Cout = 0.1 mF. See Operating I nform ation section for selection of capacitor types.
C onfiguration F ile: 19010-CDA1020315/017
Characteristics
Conditions
min
typ
max
Unit
VI
I nput voltage range
40
60
V
V
Ioff
Turn-off input voltage
D ecreasing input voltage
36
37
38
V
V
Ion
Turn-on input voltage
I ncreasing input voltage
38
39
40
V
C
I
Internal input capacitance
11
μF
P
O
Output power
0
296
W
η Efficiency
50% of m ax I
O
95.2
%
max I
O
94.6
50% of m ax I
O
, V
I
= 48 V
95.1
max I
O
, V
I
= 48 V
94.5
Pd
P ower Dissipation
max IO
17
24
W
P
li
Input idling power
I
O
= 0 A, V
I
= 53 V
4.4
W
P
RC
I nput standby power
V
I
= 53 V (turned off with R C )
0.4
W
fs
Switching frequency
0-100 % of max IO
180
kHz
VOi
Output voltage initial setting and
accuracy
TP1 = +25°C , VI = 53 V, I O = 0 A 12.415 12.45 12.485 V
VO
Output adjust range
See operating inform ation
6.9
13.2
V
Output voltage tolerance band
0-100 % of max I
O
11.5
12.7
V
Line regulation
max I
O
50
220
mV
Load regulation
V
I
= 53 V, 1-100 % of max I
O
400
500
700
mV
Vtr
Load transient
voltage deviation
V
I
= 53 V, Load step 25-75-25% of
max IO, di/dt = 1 A/μs Cout = 2.5 mF
OSCON type
±300 mV(AC)
t
tr
Load transient recovery tim e
250
µs
tr
Ramp-up time
(f rom 10−90% of VOi) 10-100 % of max IO 23 ms
ts
Start-up tim e
(from VI connection to 90% of VOi)
38 ms
tf
V
I
shut-down fall tim e
(from VI off to 10% of VO)
max IO
0.7
ms
IO = 0 A
6
s
tRC
RC st a r t -up tim e
max I
O
14
ms
RC sh ut -down fa ll tim e
(from RC off to 10% of VO)
max I
O
4
ms
I
O
= 0 A
6
s
I
O
Output current
0
25
A
I
lim
Current l imit threshold
T
P1
< max T
P1
27
30
33
A
Isc
Short circuit current
TP1 = 25ºC , see Note 1
11
A
C
out
Recommended Capaciti ve Load
T
P1
= 25ºC, see Note 2
0
2.5
10
mF
V
Oac
Output ripple & noise
See ripple & noise section, V
Oi
70
140
mVp-p
OVP Over voltage protection
T
P1
= +25°C, V
I
= 53 V, 10-100 % of
max IO 15.6 V
RC
Sink current, see N ote 3
See operating inform ation
0.7
mA
Trigger l evel
See operating inform ation
2.6/2.9
V
Note 1: OCP in hic-cup mode, rms value were recorded.
Note 2: Low ESR-value
Note 3: Si nk c ur r ent dr awn by exter nal devi ce c onnected t o the R C pi n. M i ni mum s i nk c ur r ent r equi r ed to guarantee activated RC function.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
18
Typical Characteristics
12.45 V, 45 A, 533 W, 2 products in parallel
2 × BMR 457 00 11/017
Efficiency Power Dissipation
75
80
85
90
95
100
010 20 30 40 50
[A]
[%]
40 V
53 V
60 V
0
4
8
12
16
20
010 20 30 40 50
[A]
[W]
40 V
53 V
60 V
Efficiency vs. load current and input voltage at T
P1
= +25 °C.
Dissipated power vs. load current and input voltage at
TP1 = +25 ° C .
Output Characteristics
Current Limit Characteristics
11.80
12.00
12.20
12.40
12.60
012 24 36 48 60
[A]
[V]
40 V
53 V
60 V
0.00
3.00
6.00
9.00
12.00
15.00
20 30 40 50 60 70
[A]
[V]
40 V
53 V
60 V
Output voltage vs. load current at T
P1
= +25 ° C.
Output voltage vs. load current at I
O
> ma x I
O
, T
P1
= +25 ° C.
Start-up
Output Load Transient Response
Start-up enabled by connecting V
I
at:
TP1 = +25°C, VI = 53 V,
IO = 25 A resistive load.
T op tr ac e: output vol tag e (5 V/div).
Bottom tr ac e: i nput voltage (
50 V/div).
T i me sc al e: ( 10 mS/di v)
Output voltage response to load current step-
c hang e ( 6.25-18.75 -6.25 A) at:
TP1 = + 25°C , VI = 53 V.
T op tr ac e: Output voltage (500 mV/di v).
Bottom trace:
l oad cur r ent ( 10 A/div).
T i me sc al e: (0.5 mS/div)
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Technical Specification
19
Typical Characteristics
12.45 V, 25 A, 296 W
BMR 457 0011/017
Output Current Derating – Open frame
0
5
10
15
20
25
0 20 40 60 80 100 [°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
Output Current Derating – Base plate
Thermal Resistance – Base plate
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
1
2
3
4
5
6
0.0 0.5 1.0 1.5 2.0 2.5 3.0
[m/s]
[°C/W]
Available load current vs. ambient air temperature and airflow at
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
Thermal resistance vs. airspeed measured at the converter. Tested in
wind t unnel with airflow and tes t c ondit ions as per t he Therm al
consideration section. VI = 53 V.
Output Current Derating – Base plate + Heat sink
Output Current Derating – Cold wall sealed box
0
5
10
15
20
25
020 40 60 80 100
[°C]
[A]
3.0 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
5
10
15
20
25
30
020 40 60 80 100
[°C]
[A]
Tamb
85°C
Available load current vs. base plate temperature.
VI = 53 V. See Therm al C ons iderat ion s ec t ion. Tes t ed with Plat e F in
T ransverse heatsink, height 0.23 In, P0114 T hermal Pad.
Available load current vs. base plate temperature at 85ºC ambient.
VI = 53 V. See Therm al C ons iderat ion s ec t ion.
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
20
EMC Specification
Conducted EMI measured according to EN55022, CISPR 22
and FCC part 15J (see test set
-up). See Design Note 009 for
detailed information. The fundamental switching frequency is
1
80 kHz for BMR 45 7 at VI = 53 V, m a x IO.
Conducted EMI Input terminal value (typ)
EMI without filter
Optional external filter for class B
Suggested external input filter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
L1
C1 C2 C3
C4
C5
R
-
+
Module
+
-
0
0
L2
Filter components:
C1 = 1 µF
C2 = 1 µF + 220 µF
C3 = 1 µF + 220 µF
C4 = 2.2 nF
C5 = 2.2 nF
L1 = 0.81 mH
L2 = 0.81 mH
EMI with filter
Test set-up
Layout recommendations
The radiated EMI performance of the product will depend on
the PWB layout and ground layer design. It is also important
to consider the sta
nd-off of the product. If a ground layer is
used, it should be connected to the output of the product and
the equipment ground or chassis.
A ground layer will increase the stray capacitance in the PWB
and improve the high frequency EMC performance.
Outp
ut ripple and noise
Output ripple and noise measured according to figure below.
See Design Note 022 for detailed information.
Output ripple and noise test setup
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
21
Operating information
Power Management Overview
This product is equipped with a PMBus interface to to allow
the product to be configured,and communicate with system
controllers. The product incorporates a wide range of readable
and configurable power management features that are simple
to implement
with a minimum of external components.
Additionally, the product includes protection features that
continuously safeguard the load from damage due to
unexpected system faults. A fault is also shown as an alert on
the SALERT pin. The following product parameters can
continuously be monitored by
a host: Input voltage, output
voltage/current,
duty cycle and internal temperature.
The product is delivered with a default configuration suitable
for a wide range operation in terms of input voltage, output
voltage, and load. The configuration is store
d in an internal
Non
-Volatile Memory (NVM).
All power management functions
can be reconfigured using the PMBus interface.
Please
contact your local Ericsson Power Modules representative for
design support of custom configurations or appropriate SW
tools fo
r design and down-load of your own configurations.
Input Voltage
The BMR4 57 consists of two different product families
designed for
two different input voltage ranges, 36 to 75 Vdc
and 40 to 60 Vdc
, see ordering information.
The input voltage range 36
to 75
Vdc meets the requirements
of the European Telecom Standard ETS 300 132
-
2 for normal
input voltage range in
–48 and –60 Vdc systems, -40.5 to
-
57.0 V and –50.0 to -72 V respectively.
At input voltages exceeding
75
V, the power loss will be higher
th
an at normal input voltage and TP1 must be limited to
absolute max +
125°C. The absolute maximum continuous
input voltage is
80 Vdc.
The i
nput voltage range 40 to 60 Vdc meets the requirements
for normal input voltage range in
-48 V systems, -40.5 to
-
57.0 V. At input voltages exceeding 60 V, the power loss will
be higher than at normal input voltage and T
P1
must be limited
to absolute max
+125°C. The absolute maximum continuous
input voltage is 65 Vdc.
Turn-off Input Voltage
The product monitors the input voltage and will turn on and
turn off at predetermined levels.
The minimum hysteresis
between turn on and turn off input
voltage is 2 V. The turn on
and turn off levels of the product can be reconfigured using
the PMBus interface
Remote Control (RC)
The products are fitted with a configurable remote control
function.
The primary remote control is referenced to the
primary negative input connection (
-In). The RC function
allows the converter to be turned on/off by an external device
like a semiconductor or mechanical switch. The RC pin has an
internal pull up resistor. The remote control functions can also
be configured using the PMBus
The device should be capable of
sinking 0.7 mA. When the RC pin is
left open, the voltage generated on
the RC pin is max 6 V. The standard
product is provided with “negative
logic” remote control and will be off
until the RC pin is connected to the
-
In. To turn on the product the voltage
between RC pin and -In should be
less than 1 V.
To turn off the product the RC pin should be left open for a
minimum of time 150 µs, the same time requirement applies
when the product shall turn on
.
In situations where it is desired
to have the product to power up automatically without the
need for control signals or a switch, the
RC pin can be wired
directly to
–In or disabled via the 0xE3 command. The logic
option for the primary remote control is
configured via 0xE3
command using the PMBus
.
Remote Control (secondary side)
The CTRL-pin can be configured as remote control via the
PMBus interface. In the default configuration the CTRL
-pin is
disabled and floating. The output can be configured to internal
pull
-up to 3.3 V using the MFR_ MULTI_PIN_CONFIG (0xF9)
PMBus command
. The CTRL-pin can be left open when not
used. The logic opt
ions for the secondary remote control can
be positive or negative logic.
The logic option for the
secondary remote control is configured via ON_OFF_CONFIG
(0x02) command using the PMBus
interface, see also
MFR_MULTI_PIN_CONFIG section.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the product. It is important that
the input source has low characteristic impedance. Minimum
recommended
external input capacitance is 100 µF. The
performance
in some applications can be enhanced by
addition of external capacitance as described under External
Decoupling Capacitors.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the
point of load can
be improved by addition of dec
oupling capacitors at the load.
The recommended minimum capacitance on the output is 100
µ
F.
The most effective technique is to locate low ESR ceramic
and electrolytic capacitors as close to the load as poss
ible,
using several parallel capacitors to lower the effective ESR.
The ceramic capacitors will handle high
-frequency dynamic
load changes while the electrolytic capacitors are used to
handle low frequency dynamic load changes. Ceramic
capacitors will also reduce any high frequency noise at the
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
22
load. It is equally important to use low resistance and low
inductance PWB layouts and cabling.
External decoupling
capacitors will become part of the product’s control loop. The
control loop is optimized for a wide
range of external
capacitance and the maximum recommended value that could
be used without any addit
ional analysis is found in the
e
lectrical specification.
The ESR of the capacitors is a very important parameter.
Stable operation is guaranteed with a ver
ified ESR value
of >
10 mΩ across the output connections.
For further information please contact your local Ericsson
Power Modules representative.
Parallel Operation
(Droop Load Share, DLS)
The BMR457 DLS products are variants that can be
connected in parallel. The products ha
ve a pre-configured
voltage droop
: The stated output voltage set point is at no
load
.
The output voltage will decrease when the load current is
increased
. The voltage will droop 0.6 V while load reaches
max load.
This feature allows the products to be connected in
parallel and share the current with 10% accuracy. Up to 90%
of max output curren
t can be used from each product.
When running DLS
-products in parallel
command (0xF9) must
be set according to MFR_MULTI_PIN_CONFIG.
To prevent
unnecessary current s
tres s, changes of the output voltage
must be done with the output disabled.
This must be
considered for all commands that affect the output voltage.
Feed Forward Capability
The BMR457 products have a feed forward function
implemented that can handle
sudden input voltage changes.
The output voltage will be regulated during an input transient
and will typically stay within 10% when an input transient is
applied.
PMBus configuration and support
The product provides a PMBus digital interface that enables
the user to configure many aspects of the device operation as
well as monitor the input and output parameters.
Please contact your local Ericsson Power Modules
representative for appropriate SW tools to down-load new
configurations.
Output Voltage Adjust using PMBus
The output voltage of the product can be reconfigured using
the PMBus interface.
Margin Up/Down Controls
These controls allow the output voltage to be momentarily
adjusted, eit
her up or down, by a nominal 10%. This provides
a convenie
nt method for dynamically testing the operation of
the load circuit over its supply margin or range. It can also be
used to verify the function of supply voltage supervisors.
The margin up and down levels of the product can be re
-
configured using the PMBus
interface.
Soft-start Power Up
The default rise time of the ramp up is 10 ms. When starting
by applying input voltage the control circuit boot
-up time adds
an additional 15
ms delay. The soft-start power up of the
product can be reconfigu
red using the PMBus interface.
The DLS variants have a pre
-configured ramp up time of
25
ms.
Remote Sense
The product has remote sense that can be used to
compensate for voltage drops between the output and the
point of load. The sense traces should be located close
to the
PWB ground layer to reduce noise susceptibility. The remote
sense circuitry will compensate for up to 10% voltage drop
between output pins and the point of load. If the remote sense
is not needed +Sense should be connected to +Out and
-
Sense should be connected to -
Out. To be able to use remote
sense the converter must be equipped with a Communication
interface
.
Temperature Protection (OTP, UTP)
The products are protected from thermal overload by an
internal temperature shutdown protection.
Whe
n TP1 as defined in thermal consideration section is
exceeded the product will shut down. The product will make
continuous attempts to start up (non
-latching mode) and
resume normal operation automatically when the temperature
has dropped below the tempera
ture threshold set in the
command OT_WARN_LIMIT (0x51)
; the hysteresis is defined
in general electrical specification.
The OTP and hysteresis of the product can be re
-configured
using the PMBus interface. The product has also an under
temperature protectio
n. The OTP and UTP fault limit and fault
response can be configured via the PMBus. Note: using the
fault response “continue without interruptio
n” may cause
permanent damage to
the product
Over Voltage Protection (OVP)
The product includes over voltage limiting circuitry for
protection of the load. The default OVP limit is 30% above the
nominal output voltage. If the output voltage exceeds the OVP
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
23
limit, the product can respond in different ways.
The default response from an over
voltage fault is to
immediately shut down. The device will continuously check for
the presence of the fault condition, and when the fault
condition no longer exists the device will be re
-enabled.
The OVP fault level and fault response can be re
-configured
using the PMBus interfac
e.
Over Current Protection (OCP)
The product includes current limiting circuitry for protection at
continuous overload. The
default setting for the product is hic-
up mode if the maximum output current is exceeded and the
output voltage is below 0.3×Vout
, set in command
IOUT_OC_LV_FAULT_LIMIT (0x48). Above the trip voltage
value in command 0x48 the product will continue operate
while maintaining the output current at the value set by
IOUT_OC_FAULT_LIMIT (0x46). The load distribution should
be designed for
the maximum output short circuit current
specified.
Droop
Load Share variants (DLS) will enter hic-up mode,
with
a trip voltage, 0.04×Vout, set in command
IOUT_OC_LV_FAULT_LIMIT (0x48). Above the trip voltage in
command
(0x48) the product will continue operate while
maintaining the output current at the value set by
IOUT_OC_FAULT_LIMIT (0x46).
The over current protection of the product can be reconfigured
using the PMBus interface.
Input Over/Under voltage protection
The input of the product can be protected from high input
voltage
and low input voltage. The over/under-voltage fault
level and fault response can be configured via the PMBus
interface.
Pre
-bias Start-up Capability
The product has a Pre-bias start up functionality and will not
sink cu
rrent during start up if a Pre-bias source is present at
the output terminals
. If the Pre-bias voltage is lower than the
target value set in V
OUT_C OMMAN D (0x21), the product will
ramp up to the target value
. If the Pre-bias voltage is higher
than the
target value set in VOUT_COMMAND (0x21), the
product will ramp down to the target value
and in this case
sink current
for a limited of time set in the command
TOFF_MAX_WARN_LIMIT (0x66).
Power Good
The product provides Power Good (PG) flag in the Status
Wor
d register that indicates the output voltage is within a
specified tolerance of its target level and no fault condition
exists. If specified in section Connections, the product also
provides a PG signal output.
The Power Good signal is by
d
efault configured as active low, Push-pull and can be re-
configured via the PMBus interface.
The Power Good output
can be configured as
Push-pull or “High Z when active” to
permit AND’ing of parallel devices. It is not recommended to
use Push-pull when paralleling PG-pins, see
MFR_MULTI_PIN_CONFIG
.
Synchronization, Tracking and External reference
This product does not support synchronization, tracking or
external reference
.
Switching frequency adjust using PMBus
The switching frequency is set to 180 kHz as default but this
can be reconfigured via the PMBus interface. The product is
optimized at this frequency but can run at low
er and higher
frequency,
(170 kH z – 190 kHz). The electrical performance
can be affected if the switching frequency is changed
.
MFR_MULTI_PIN_CONFI G
The MFR_MULTI_PIN_CONFIG (0xF9) command enables or
disables different functions inside the product. This command
can
be configured according to the table for different functions.
Bit 7:6
00 = Stand alone
01 = Slave (N /A)
10 = DLS
11 = M aster (N/A)
1 1 1 1 1 1 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0
Bit 5
Power Good High Z
when active
0 0 0 0 1 1 0 0 0 0 1 1
Bit 4
Tracking enable
(N/A)
0 0 0 0 0 0 0 0 0 0 0 0
Bit 3
External r efer ence
(N/A)
0 0 0 0 0 0 0 0 0 0 0 0
Bit 2
Power Good
Enable
0 0 1 1 1 1 0 0 1 1 1 1
Bit 1
Reser ved
1 1 1 1 1 1 0 0 0 0 0 0
Bit 0
Secondary Remote
Control Pull
up/down resi stor
enable 1)
0 1 0 1 0 1 0 1 0 1 0 1
1) When not used
with PM Bus, the
CTRL input can be
internally pulled up
or down depending
on if it is active high
or l ow. When active
low it will be pulled
up and vice versa
DLS, PMBus Control (0x82)
DLS, Sec RC w/ pull up/down (0x83)
DLS, Power Good Push-p ul l, P MB us C o n t rol
(0x86)
DLS, Power Good Push-p ul l,
Sec RC w/ pull up/down (0x87)
DLS, Power Good Hi g h Z w h en a ct iv e,
PMBus Control (0xA6)
DLS, Power Good High Z when active,
Sec RC w/ pull up/down (0xA7)
Stand alone, PMBus Control (0x00)
Stand alone, Sec RC w/ pull up/down (0x01)
Stand alone, Power Good Push-pull, PMBus
Control (0x04)
Stand alone, Power Good Pus h-pull,
Sec RC w/ pull up/down (0x05)
Stand alone, Power Good High Z when
active,
PMBus Control (0x24)
Stand alone, Power Good High Z when
active,
Sec RC w/ pull up/down (0x25)
The MFR_
MULTI_PIN_CONFIG can be reconfigured using
the PMBus interface.
Default configuration is set to Power
Good Push
-Pull (0x04) for stand alone variants and DLS
Power Good Push
-Pull (0x86) for Droop Load Share variants.
User customized settings
This product has 2 data storage set: Default data (Ericsson
factory) and User d
ata. The User data set’s priority is higher
than the Default data. The User data area is empty while
shipped to customer. After boot-up, if the controller found no
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
24
data stored in User data area, it will load Default data instead.
Customer can change the R
AM data and store the changes
into flash memory by PMBUS Store_User_All, next power
cycle will load the User data into RAM for execute.
Store_Default_All is write protected to ensure the factory
settings is always available for recovery.
Output Voltag
e Regulation
The BMR4 57 products are designed to be fully regulated
within the
plotted area. Operating outside this area is not
recommended.
12.0
12.2
12.4
12.6
12.8
13.0
13.2
13.4
35 45 55 65 75
Vin [V]
Vout [V]
Vin range: 36-75Vdc
BMR4 57xx0 4/xxx
12.0
12.2
12.4
12.6
12.8
13.0
13.2
13.4
35 40 45 50 55 60 65
Vin [V]
Vout [V]
Vin range:40-60Vdc
BMR4 57xx0 0/xxx
Thermal Consideration
General
The product is designed to operate in different thermal
environments and sufficient cooling must be provided to
ensure reliable operation.
For products mounted on a PWB without a heat sink attached,
cooling is achieved mainly by conductio
n, from the pins to the
host board, and convection, which is dependant on the airflow
across the product. Increased airflow enhances the cooling of
the product. The Output Current Derating graph fou
nd in the
o
utput section for each model provides the available output
current vs. ambient air temperature and air velocity at
V
I =53 V.
The product is tested on a 254 x 254 mm, 35 µm (1 oz),
16
-layer test board mounted vertically in a wind tunnel with a
cross
-section of 608 x 203 mm.
For products with base plate used in a sealed box/cold wall
application, cooling is achieved mainly by conduction through
the cold wall. The Output Current Derating graphs are found in
the o
utput section for each model. The product is tested in a
sealed box test se
t up with ambient temperatures 85, 55 and
25°C. See Design Note 028 for further details.
Definition of product operating temperature
The product operating temperature is used to monitor the
temperature of the product, and proper thermal conditions
can be
verified by measuring the temperature at positions
P1, P2, P3 and P4
. The temperature at these positions (TP1,
T
P2, TP3, TP4) should not exceed the maximum temperatures
in the table below. The number of measurement points may
vary with different thermal de
sign and topology.
Temperatures above maximum T
P1, measured at the
reference point P1
(both for openframe and base plate
versions)
are not allowed and may cause permanent
damage.
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
25
Position
Description
Max temperature
P1
PWB (reference point, open
f r a me and base-plate) TP1=125º C
P2
Opto-coupler
T
P2
=105º C
P3 Secondary MOSFET TP3=125º C
P4
Magnetic Core
T
P4
=125º C
TOP Vie w Bottom View
Open frame Open frame and Baseplate
(Best air flow direction is from
negative to positive pins.)
Ambient Temperature Calculation
For products with base plate the maximum allowed ambient
temperature can be calculated by using the thermal
resistance.
1. The power loss is calculated
by using the formula
((1/η)
- 1) × output power = power losses (Pd).
η = efficiency of p
roduct. E.g. 95 % = 0.95
2. Find the thermal resistance (Rth) in the Thermal Resistance
graph found in the Output section for each model.
Note that
the thermal resista
nce can be significantly reduced if a
heat sink is mounted on the top of the base plate.
Calculate the temperature increase (
∆T).
∆T = R th x Pd
3. Max allowed ambient temperature is:
Max T
P1 - ∆T.
E.g. B
MR 4 57 0004/001 at 2m/s :
1.
(( ) - 1) × 264 W = 15.4 W
2. 1
5.4 W × 3.4°C/W = 52°C
3. 125 °C
– 52°C = m ax a mbient temperature is 73°C
The actual temperature will be dependent on several factors
such as the PWB size, number of layers and direction of
airflow.
Connections (Top view)
Pin Designation Function
+In
Positive Input
RC
Remote Control
-In
Negative Input
-Out
Negative Output
S+
Positive Remote Sense
S-
Negative Remote Sense
SA0
Address pin 0
SA1
Address pin 1
SCL
PMBus Clock
SDA
PMBus Data
PG
Power Good output
DGND
PMBus ground
SALERT
PMBus alert signal
15 CTRL PMBus remote control
+Out
Positive Output
1
0.945
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BMR457 series Fully regulated Advanced Bus Converters
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Technical Specification
26
Ericsson Internal
PRODUCT SPECIFICATION
1 (4)
Prepared (also subject responsible if other)
No.
SECSUND 31/1301-BMR 456+ Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EMAOLII 2012-06-25 B
PMBus Interface
This product provides a PMBus digital interface that enables
the user to configure many aspects of the device operation as
well as to monitor the input and output voltages, output current
and device temperature. The product can be used with any
standard two-wire I2C or SMBus host device. In addition, the
product is compatible with PMBus version 1.2 and includes an
SALERT line to help mitigate bandwidth limitations related to
continuous fault monitoring. The product supports 100 kHz and
400 kHz bus clock frequency only. The PMBus signals, SCL,
SDA and SALERT require passive pull-up resistors
as stated in
the SMBus Specification. Pull-up resistors are required to
guarantee the rise time as follows:
Eq. 7
usCR
pP 1≤=
τ
where Rp is the pull-up resistor value and Cp is the bus load.
The maximum allowed bus load is 400 pF. The pull-up resistor
should be tied to an external supply between 2.7 to 5.5 V,
which should be present prior to or during power-up. If the
proper power supply is not available, voltage dividers may be
applied. Note that in this case, the resistance in the equation
above corresponds to parallel connection of the resistors
forming the voltage divider.
It is recommended to always use PEC (Packet Error Check)
when communicating via PMBus. For these products it is a
requirement to use PEC when using Send Byte to the device,
for example command “RESTORE_DEFAULT_ALL”.
Monitoring via PMBus
A system controller (host device) can monitor a wide variety of
parameters through the PMBus interface. The controller can
monitor fault conditions by monitoring the SALERT pin, which
will be asserted when any number of pre-configured fault or
warning conditions occur. The system controller can also
continuously monitor any number of power conversion
parameters including but not limited to the following:
• Input voltage
• Output voltage
• Output current
• Internal junction temperature
• Switching frequency (Monitors the set value not actual
frequency)
• Duty cycle
Software Tools for Design and Production
For this products Ericsson provides software for configuring
and monitoring via the PMBus interface.
For more information please contact your local
Ericsson sales representative.
PMBus Addressing
The following figure and table show recommended resistor
values with min and max voltage range for hard-wiring PMBus
addresses (series E12, 1% tolerance resistors suggested):
Schematic of connection of address resistors.
SA0/SA1 Index RSA0/RSA1 [kΩ]
0
10
1
22
2 33
3
47
4
68
5
100
6
150
7 220
The SA0 and SA1 pins can be configured with a resistor to
GND according to the following equation.
PMBus Address = 8 x (SA0value) + (SA1 value)
If the calculated PMBus address is 0, 11 or 12, PMBus address
127 is assigned instead. From a system point of view, the user
shall also be aware of further limitations of the addresses as
stated in the PMBus Specification. It is not recommended to
keep the SA0 and SA1 pins left open.
I2C/SMBus – Timing
Setup and hold times timing diagram
The setup time, t
set
, is the time data, SDA, must be stable
before the rising edge of the clock signal, SCL. The hold time
thold, is the time data, SDA, must be stable after the rising edge
of the clock signal, SCL. If these times are violated incorrect
data may be captured or meta-stability may occur and the bus
communication may fail. When configuring the product, all
standard SMBus protocols must be followed, including clock
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
27
Ericsson Internal
PRODUCT SPECIFICATION
2 (4)
Prepared (also subject responsible if other)
No.
SECSUND 31/1301-BMR 456+ Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EMAOLII 2012-06-25 B
stretching. Additionally, a bus-free time delay between every
SMBus transmission (between every stop & start condition)
must occur. Refer to the SMBus specification, for SMBus
electrical and timing requirements. Note that an additional
delay of 5 ms has to be inserted in case of storing the RAM
content into the internal non-volatile memory.
PMBus Commands
The products are PMBus compliant. The following table lists
the implemented PMBus read commands. For more detailed
information see PMBus Power System Management Protocol
Specification; Part I – General Requirements, Transport and
Electrical Interface and PMBus Power System Management
Protocol; Part II – Command Language.
Designation Cmd Prot
Standard PMBus Commands
Control Commands
OPERATION
01h
No
ON_OFF_CONFIG
02h
No
WRITE_PROTECT
10h
No
Output Commands
VOUT_MODE
20h
No
VOUT_COMMAND
21h
No
VOUT_TRIM
22h
No
VOUT_CAL_OFFSET
23h
Yes
VOUT_MAX
24h
No
VOUT_MARGIN_HIGH
25h
No
VOUT_MARGIN_LOW
26h
No
VOUT_TRANSITION_RATE
27h
No
VOUT_SCALE_LOOP
29h
Yes
VOUT_SCALE_MONITOR
2Ah
Yes
MAX_DUTY
32h
No
FREQUENCY_SWITCH
33h
No
VIN_ON
35h
No
VIN_OFF
36h
No
IOUT_CAL_GAIN
38h
Yes
IOUT_CAL_OFFSET
39h
Yes
Fault Commands
VOUT_OV_FAULT_LIMIT
40h
No
VOUT_OV_FAULT_RESPONSE
41h
No
VOUT_OV_WARN_LIMIT
42h
No
VOUT_UV_WARN_LIMIT
43h
No
VOUT_UV_FAULT_LIMIT
44h
No
VOUT_UV_FAULT_RESPONSE
45h
No
IOUT_OC_FAULT_LIMIT
46h
No
Designation Cmd Prot
IOUT_OC_FAULT_RESPONSE
47h
No
IOUT_OC_LV_FAULT_LIMIT
48h
No
IOUT_OC_WARN_LIMIT
4Ah
No
OT_FAULT_LIMIT
4Fh
No
OT_FAULT_RESPONSE 50h No
OT_WARN_LIMIT
51h
No
UT_WARN_LIMIT
52h
No
UT_FAULT_LIMIT
53h
No
UT_FAULT_RESPONSE
54h
No
VIN_OV_FAULT_LIMIT
55h
No
VIN_OV_FAULT_RESPONSE
56h
No
VIN_OV_WARN_LIMIT
57h
No
VIN_UV_WARN_LIMIT
58h
No
VIN_UV_FAULT_LIMIT
59h
No
VIN_UV_FAULT_RESPONSE
5Ah
No
POWER_GOOD_ON
5Eh
No
POWER_GOOD_OFF
5Fh
No
Time setting Commands
TON_DELAY
60h
No
TON_RISE 61h No
TON_MAX_FAULT_LIMIT
62h
No
TON_MAX_FAULT_RESPONSE
63h
No
TOFF_DELAY
64h
No
TOFF_FALL
65h
No
TOFF_MAX_WARN_LIMIT
66h
No
Status Commands (Read Only)
CLEAR_FAULTS
03h
No
STATUS_BYTES
78h
No
STATUS_WORD
79h
No
STATUS_VOUT
7Ah
No
STATUS_IOUT
7Bh
No
STATUS_INPUT
7Ch
No
STATUS_TEMPERATURE
7Dh
No
STATUS_CML
7Eh
No
STATUS_OTHER 7Fh No
Monitior Commands (Read Only)
READ_VIN
88h
No
READ_VOUT
8Bh
No
READ_IOUT
8Ch
No
READ_TEMPERATURE_1 8Dh No
READ_TEMPERATURE_2
8Eh
No
READ_DUTY_CYCLE
94h
No
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
28
Ericsson Internal
PRODUCT SPECIFICATION
3 (4)
Prepared (also subject responsible if other)
No.
SECSUND 31/1301-BMR 456+ Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EMAOLII 2012-06-25 B
Designation Cmd Prot
READ_FREQUENCY
95h
No
Configuration and Control Commands
USER_DATA_00
B0h
No
Identification Commands (Read Only)
PMBUS_REVISION
98h
No
MFR_ID
99h
Yes
MFR_MODEL
9Ah
Yes
MFR_REVISION
9Bh
Yes
MFR_LOCATION
9Ch
Yes
MFR_DATE
9Dh
Yes
MFR_SERIAL
9Eh
Yes
Supervisory Commands
STORE_DEFAULT_ALL
11h
Yes
RESTORE_DEFAULT_ALL
12h
No
STORE_USER_ALL
15h
No
RESTORE_USER_ALL
16h
No
CAPABILITY
19h
No
Product Specific Commands
MFR_POWER_GOOD_POLARITY D0h No
MFR_VIN_SCALE_MONITOR D3h Yes
MFR_SELECT_TEMP_SENSOR DCh No
MFR_VIN_OFFSET DDh Yes
MFR_VOUT_OFFSET_MONITOR DEh Yes
MFR_TEMP_OFFSET_INT E1h No
MFR_REMOTE_TEMP_CAL E2h No
MFR_REMOTE_CTRL E3h No
MFR_DEAD_BAND_DELAY
E5h
Yes
MFR_TEMP_COEFF
E7h
Yes
MFR_DEBUG_BUFF
F0h
No
MFR_SETUP_PASSWORD
F1h
No
MFR_DISABLE_SECURITY_ONCE
F2h
No
MFR_DEAD_BAND_IOUT_THRESHOLD
F3h
Yes
MFR_SECURITY_BIT_MASK
F4h
Yes
MFR_PRIMARY_TURN
F5h
Yes
MFR_SECONDARY_TURN
F6h
Yes
MFR_ILIM_SOFTSTART
F8h
No
MFR_MULTI_PIN_CONFIG
F9h
No
MFR_DEAD_BAND_VIN_THRESHOLD
FAh
Yes
MFR_DEAD_BAND_VIN_IOUT_HYS
FBh
Yes
MFR_RESTART
FEh
No
Notes:
Cmd, is short for Command.
Prot, is short for commands that are protected with security
mask.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
29
Mechanical Information - Hole Mount, Open Frame Version
All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle,
unless explicitly described and dimensioned in this drawing.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
30
Mechanical Information - Hole Mount, Base Plate Version
All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle,
unless explicitly described and dimensioned in this drawing.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
31
Mechanical Information - Surface Mount Version
All component placements – whether shown as physical components or symbolical outline – are for reference only and are subject to change throughout the product’s life cycle,
unless explicitly described and dimensioned in this drawing.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
32
Ericsson Internal
PRODUCT SPEC.
1 (5)
Prepared (also subject responsible if other)
No.
EPEIHLI 5/1301 - BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) See §1 2012-06-25 C
Soldering Information - Surface Mounting
The surface mount product is intended for forced convection or
vapor phase reflow soldering in SnPb and Pb-free processes.
The reflow profile should be optimised to avoid excessive
heating of the product. It is recommended to have a sufficiently
extended preheat time to ensure an even temperature across
the host PWB and it is also recommended to minimize the time
in reflow.
A no-clean flux is recommended to avoid entrapment of
cleaning fluids in cavities inside the product or between the
product and the host board, since cleaning residues may affect
long time reliability and isolation voltage.
General reflow process specifications
SnPb eutectic
Pb-free
Average ramp-up (TPRODUCT)
3°C/s max
3°C/s max
Typical solder melting (liquidus)
temperature
TL 183°C 221°C
Minimum reflow time above TL
60 s
60 s
Minimum pin temperature
TPIN
210°C
235°C
Peak product temperature
TPRODUCT
225°C
260°C
Average ramp-down (TPRODUCT) 6°C/s max 6°C/s max
Maximum time 25°C to peak
6 minutes
8 minutes
T
PRODUCT
maximum
T
PIN
minimum
Time
Pin
profile
Product
profile
T
L
Time in
reflow
Time in preheat
/ soak zone
Time 25°C to peak
Temperature
Minimum Pin Temperature Recommendations
Pin number 5 chosen as reference location for the minimum pin
temperature recommendation since this will likely be the
coolest solder joint during the reflow process.
SnPb solder processes
For SnPb solder processes, a pin temperature (T
PIN
) in excess
of the solder melting temperature, (TL, 183
°C for Sn63Pb37) for
more than 60 seconds and a peak temperature of 220°C is
recommended to ensure a reliable solder joint.
For dry packed products only: depending on the type of solder
paste and flux system used on the host board, up to a
recommended maximum temperature of 245°C could be used,
if the products are kept in a controlled environment (dry pack
handling and storage) prior to assembly.
Lead-free (Pb-free) solder processes
For Pb-free solder processes, a pin temperature (TPIN) in
excess of the solder melting temperature (TL, 217 to 221°C for
SnAgCu solder alloys) for more than 60 seconds and a peak
temperature of 245°C on all solder joints is recommended to
ensure a reliable solder joint.
Maximum Product Temperature Requirements
Top of the product PWB near pin 2 is chosen as reference
location for the maximum (peak) allowed product temperature
(TPRODUCT) since this will likely be the warmest part of the
product during the reflow process.
SnPb solder processes
For SnPb solder processes, the product is qualified for MSL 1
according to IPC/JEDEC standard J-STD-020C.
During reflow TPRODUCT must not exceed 225 °C at any time.
Pb-free solder processes
For Pb-free solder processes, the product is qualified for MSL 3
according to IPC/JEDEC standard J-STD-020C.
During reflow TPRODUCT must not exceed 260 °C at any time.
Dry Pack Information
Products intended for Pb-free reflow soldering processes are
delivered in standard moisture barrier bags according to
IPC/JEDEC standard J-STD-033 (Handling, packing, shipping
and use of moisture/reflow sensitivity surface mount devices).
Using products in high temperature Pb-free soldering
processes requires dry pack storage and handling. In case the
products have been stored in an uncontrolled environment and
no longer can be considered dry, the modules must be baked
according to J-STD-033.
Thermocoupler Attachment
Top of PWB near pin 2 for measurement of maximum product
temperature, TPRODUCT
Pin 5 for measurement of minimum pin (solder joint) temperature, T
PIN
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
33
Ericsson Internal
PRODUCT SPEC.
2 (5)
Prepared (also subject responsible if other)
No.
EPEIHLI 5/1301 - BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) See §1 2012-06-25 C
Soldering Information - Hole Mounting
The hole mounted product is intended for plated through hole
mounting by wave or manual sol
dering. The pin temperature is
specified to maximum to 270°C for maximum 10 seconds.
A maximum preheat rate of 4°C/s and maximum preheat
temperature of 150°C is suggested. When soldering by hand,
care should be taken to avoid direct contact between the hot
soldering iron tip and the pins for more than a few seconds in
order to prevent overheating.
A no-clean flux is recommended to avoid entrapment of
cleaning fluids in cavities inside the product or between the
product and the host board. The cleaning residues may affect
long time reliability and isolation voltage.
Delivery Package Information
The products are delivered in antistatic injection molded trays
(Jedec design guide 4.10D standard) and in antistatic trays.
Tray Specifications – SMD /Pin in paste
Material
Antistatic PPE
Surface resistance 10
5
< Ohm/square < 10
12
Bakability
The trays can be baked at maximum
125°C for 48 hours
Tray thickness
17.40 mm 0.685 [ inch]
Box capacity 100 products (5 full trays/box)
Tray weight
125 g empty, 605 g full tray
JEDEC standard tray for 2x5 = 10 products.
All dimensions in mm [inch]
Tolerances: X.x ±0.26 [0.01], X.xx ±0.13 [0.005]
Note: pick up positions refer to center of pocket.
See mechanical drawing for exact location on product.
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
34
Ericsson Internal
PRODUCT SPEC.
3 (5)
Prepared (also subject responsible if other)
No.
EPEIHLI 5/1301 - BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) See §1 2012-06-25 C
Tray Specifications – Through hole Version
Material
PE Foam, dissipative
Surface
resistance
105 < Ohm/square < 1012
Bakability
The trays are not bakeable
Tray capacity
25 converters/tray
Box capacity
75 products (3 full trays/box)
Weight
Product – Open frame
790 g full tray, 140g empty tray
Product – Base plate option
1090 g full tray, 140 g empty tray
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
35
Ericsson Internal
PRODUCT SPEC.
4 (5)
Prepared (also subject responsible if other)
No.
EPEIHLI 5/1301 - BMR 457 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) See §1 2012-06-25 C
Product Qualification Specification
Characteristics
External visual inspection IPC-A-610
Change of temperature
(Temperature cycling) IEC 60068-2-14 Na
Temperature range
Number of cycles
Dwell/transfer time
-40 to 100°C
500
15 min/0-1 min
Cold (in operation) IEC 60068-2-1 Ad
Temperature T
A
Duration
-45°C
72 h
Damp heat IEC 60068-2-67 Cy
Temperature
Humidity
Duration
85°C
85 % RH
1000 hours
Dry heat IEC 60068-2-2 Bd Temperature
Duration
125°C
1000 h
Electrostatic discharge
susceptibility
IEC 61340-3-1, JESD 22-A114
IEC 61340-3-2, JESD 22-A115
Human body model (HBM)
Machine Model (MM)
Class 2, 2000 V
Class 3, 200 V
Immersion in cleaning solvents IEC 60068-2-45 XA, method 2
Water
Glycol ether
Isopropyl alcohol
55°C
35°C
35°C
Mechanical shock IEC 60068-2-27 Ea
Peak acceleration
Duration
100 g
6 ms
Moisture reflow sensitivity 1 J-STD-020C Level 1 (SnPb-eutectic)
Level 3 (Pb Free)
225°C
260°C
Operational life test MIL-STD-202G, method 108A Duration 1000 h
Resistance to soldering heat 2 IEC 60068-2-20 Tb, method 1A
Solder temperature
Duration
270°C
10-13 s
Robustness of terminations
IEC 60068-2-21 Test Ua1
IEC 60068-2-21 Test Ue1
Through hole mount products
Surface mount products
All leads
All leads
Solderability
IEC 60068-2-58 test Td 1
IEC 60068-2-20 test Ta 2
Preconditioning
Temperature, SnPb Eutectic
Temperature, Pb-free
Preconditioning
Temperature, SnPb Eutectic
Temperature, Pb-free
150°C dry bake 16 h
215°C
235°C
Steam ageing
235°C
245°C
Vibration, broad band random IEC 60068-2-64 Fh, method 1
Frequency
Spectral density
Duration
10 to 500 Hz
0.07 g2/Hz
10 min in each direction
Notes
1 Only for products intended for reflow soldering (surface mount products)
2 Only for products intended for wave soldering (plated through hole products)
E
BMR457 series Fully regulated Advanced Bus Converters
Input 36-75 V, Output up to 25 A / 300 W
1/28701-FGC 101 1835 revD May 2015
© Ericsson AB
Technical Specification
36
Mouser Electronics
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