Ericsson Internal
PRODUCT SPECIFICATION 1 (4)
Prepared (also subject responsible if other) No.
EAB/FC/P Jakub Brindell 1/1301-BMR451 Uen
Approved Checked Date Rev Reference
EAB/FC/P Jakub Brindell EJAKBRI 2009-01-09 B
Key Features
• Small package
30.85 x 20 x 8.2 mm (1.215 x 0.787 x 0.323 in.)
• 40 A output current
• 4.5 V - 14 V input voltage range
• 0.6 V – 3.6 V output voltage range
• High efficiency, typ. 96,4 % at half load, 5 Vin, 3.3 Vout
• 2.6 million hours MTBF
• Through hole and surface mount versions
• PMBus compliant
General Characteristics
• Voltage/current/temperature monitoring
• Precision delay and ramp-up
• Non-linear transient response
• Wide output voltage adjust function
• Start up into a pre-biased output
• Output short-circuit protection
• Over temperature protection
• On/Off remote control
• Output voltage sense
• ISO 9001/14001 certified supplier
• Compliant with CMM software
Safety Approvals Design for Environment
815575 Meets requirements in high-
temperature lead-free soldering
processes.
Ericsson Internal
TABLE OF CONTENTS 2 (2)
Prepared (also subject responsible if other) No.
EAB/FC/P Jakub Brindell EN/LZT 146 243 Uen
Approved Checked Date Rev Reference
EAB/FC/P Jakub Brindell EJAKBRI 2009-01-09 B
Contents
General Information .............................................................2
Safety Specification .............................................................3
Absolute Maximum Ratings .............................................................4
Functional Description .............................................................5
Product Program Ordering No.
1.0 V, 40 A / 40 W - Electrical Specification BMR 451...............................................6
3.3 V, 40 A / 132 W - Electrical Specification BMR 451...............................................9
EMC Specification ........................................................... 12
Operating Information ...........................................................12
Thermal considerations ........................................................... 15
Connections ...........................................................15
PMBus Interface ...........................................................17
Mechanical Information ...........................................................19
Soldering Information ...........................................................21
Delivery Information ...........................................................22
Product Qualification Specification ........................................................... 23
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
Ericsson Internal
PRODUCT SPECIFICATION 2 (4)
Prepared (also subject responsible if other) No.
EAB/FC/P Jakub Brindell 1/1301-BMR451 Uen
Approved Checked Date Rev Reference
EAB/FC/P Jakub Brindell EJAKBRI 2009-01-09 B
General Information
Ordering Information
Number Description
BMR451
n1
n2
n3 n4
n5 n6 n7
n8
Default 40 A POL
0 = Through hole mount version
1 = Surface mount version
0 = Open frame (default)
02 = 4.5 – 14 Vin PMBus and analog voltage adjust
020 = Default configuration variant
0 = Tray
As an example a 40 A POL, surface mount, open frame, 4.5-14Vin product
with default configuration variant 020 packed in trays would be
BMR451 1002 020 0.
Reliability
The Mean Time Between Failure (MTBF) is calculated at
full output power and an operating ambient temperature
(TA) of +40°C, which is a typical condition in Information
and Communication Technology (ICT) equipment. Different
methods could be used to calculate the predicted MTBF
and failure rate which may give different results. Ericsson
Power Modules currently uses Telcordia SR332.
Predicted MTBF for the series is:
- 2.6 million hours according to Telcordia SR332, issue
1, Black box technique.
Telcordia SR332 is a commonly used standard method
intended for reliability calculations in ICT equipment. The
parts count procedure used in this method was originally
modelled on the methods from MIL-HDBK-217F, Reliability
Predictions of Electronic Equipment. It assumes that no
reliability data is available on the actual units and devices
for which the predictions are to be made, i.e. all predictions
are based on generic reliability parameters.
Compatibility with RoHS requirements
The products are compatible with the relevant clauses and
requirements of the RoHS directive 2002/95/EC and have a
maximum concentration value of 0.1% by weight in
homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
homogeneous materials for cadmium.
Exemptions in the RoHS directive utilized in Ericsson
Power Modules products include:
- Lead in high melting temperature type solder (used to
solder the die in semiconductor packages)
- Lead in glass of electronics components and in
electronic ceramic parts (e.g. fill material in chip
resistors)
- Lead as an alloying element in copper alloy containing
up to 4% lead by weight (used in connection pins made
of Brass)
Quality Statement
The products are designed and manufactured in an
industrial environment where quality systems and methods
like ISO 9000, 6σ (sigma), and SPC are intensively in use
to boost the continuous improvements strategy. Infant
mortality or early failures in the products 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 our products.
Warranty
Warranty period and conditions are defined in Ericsson
AB’s General Terms and Conditions of Sale. Ericsson AB
does not make any other warranties, expressed or implied
including any warranty of merchantability, effects of product
configurations made by customers or fitness for a particular
purpose.
© Ericsson AB 2008
The information and specifications in this technical
specification is believed to be correct at the time of
publication. However, no liability 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
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
2
Ericsson Internal
PRODUCT SPECIFICATION 3 (4)
Prepared (also subject responsible if other) No.
EAB/FC/P Jakub Brindell 1/1301-BMR451 Uen
Approved Checked Date Rev Reference
EAB/FC/P Jakub Brindell EJAKBRI 2009-01-09 B
Safety Specification
General information
Ericsson Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with safety
standards IEC/EN/UL60950, Safety of Information
Technology Equip m ent.
IEC/EN/UL60950 contains requirements to prevent injury
or damage due to the following hazards:
• 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 acceptability
apply for component power 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 components complies with the
requirements of all applicable Safety standards and
Directives for the final product.
Component power supplies for general use should comply
with the requirements in IEC60950, EN60950 and
UL60950 “Safety of information technology equipment”.
There are other more product related standards, e.g.
IEEE802.3af “Ethernet LAN/MAN Data terminal equipment
power”, and ETS300132-2 “Power supply interface at the
input to telecommunications equipment; part 2: DC”, but all
of these standards are based on IEC/EN/UL60950 with
regards to safety.
Ericsson Power Modules DC/DC converters and DC/DC
regulators are UL60950 recognized and certified in
accordance with EN60950.
The flammability rating for all construction parts of the
products meets requirements for V-0 class material
according to IEC 60695-11-10.
The products should be installed in the end-use equipment,
in accordance with the requirements of the ultimate
application. Normally the output of the DC/DC converter is
considered as SELV (Safety Extra Low Voltage) and the
input source must be isolated by minimum Double or
Reinforced Insulation from the primary circuit (AC mains) in
accordance with IEC/EN/UL60950.
Isolated DC/DC converters
It is recommended that a slow blow fuse with a rating twice
the maximum input current per selected product be used 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 in the input filter
or in the DC/DC converter that imposes a short circuit on
the input source, this fuse will provide the following
functions:
• Isolate the faulty DC/DC converter from the input
power source so as not to affect the operation of
other parts of the system.
• Protect the distribution wiring from excessive
current and power loss thus preventing hazardous
overheating.
The galvanic isolation is verified in an electric strength test.
The test voltage (Viso) between input and output is
1500 Vdc or 2250 Vdc for 60 seconds (refer to Absolute
maximum ratings).
Leakage current is less than 1 µA at nominal input voltage.
24 V DC systems
The input voltage to the DC/DC converter is SELV (Safety
Extra Low Voltage) and the output remains SELV under
normal and abnormal operating conditions.
48 and 60 V DC systems
If the input voltage to the DC/DC converter is 75 Vdc or
less, then the output remains SELV (Safety Extra Low
Voltage) under normal and abnormal operating conditions.
Single fault testing in the input power supply circuit should
be performed with the DC/DC converter connected to
demonstrate that the input voltage does not exceed
75 Vdc.
If the input power source circuit is a DC power system, the
source may be treated as a TNV2 circuit and testing has
demonstrated compliance with SELV limits and isolation
requirements equivalent to Basic Insulation in accordance
with IEC/EN/UL60950.
Non-isolated DC/DC regulators
The input voltage to the DC/DC regulator is SELV (Safety
Extra Low Voltage) and the output remains SELV under
normal and abnormal operating conditions.
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
3
Ericsson Internal
PRODUCT SPEC 1 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
Absolute Maximum Ratings
Characteristics min typ max Unit
T
P1
Operating temperature (see Thermal Consideration section) -40 120 °C
T
S
Storage temperature -40 125 °C
V
I
Input voltage (See Operating Information Section for input and output voltage relations) -0.3 16 V
V
O
Output voltage 0.6 3.6 V
P
O
Output power 132 W
Logic I/O voltage CTRL, SA(0,1), SALERT, SCL, SDA, FLEX -0.3 6.5 V
Ground voltage differential DGND, -S, GND -0.3 0.3 V
Analog pin voltage VOUT, +S -0.3 6.5 V
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes referred to as no destruction limits, are
normally tested with one parameter at a time exceeding the limits of Output data or Electrical Characteristics. If exposed to stress above these limits, function and
performance may degrade in an unspecified manner.
Fundamental Circuit Diagram
VIN VOUT
GND +S
-S
SCL
SDA
DGND
CTRL
SALERT
SA0
SA1
FLEX
DPWM Controller and I/O
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
4
Ericsson Internal
PRODUCT SPEC 2 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
Functional Specification
T
P1
= -40 to +85ºC, V
I
= 4.5 to 14 V
Typical values given at: T
P1
= +25°C, V
I
= 12 V, max I
O
, unless otherwise specified under Conditions
Configuration File: 190 10-CDA 102 900/020
Characteristics Conditions min typ max Unit
SMBus monitoring
VIN_READ, 0x88h Accuracy vs. V
I
-3 3 %
VOUT_READ, 0x8Bh Accuracy vs. V
O
-1 1 %
IOUT_READ, 0x8Ch Accuracy vs. I
O
-20 20 %
General Electrical Characteristics
f
s
Switching frequency Factory default 320 kHz
C
ISMBus
Internal capacitance SMBus signals, SDA, SCL 10 pF
C
I
Internal input capacitance 140 µF
Fault Protection Characteristics
UVLO Threshold 4.0 V
Set point accuracy -100 100 mV
Hysteresis Factory default 0.4 V
Input Under
Voltage Lockout,
UVLO
Delay 2.5 µs
UVP threshold Factory default 85 % V
OUT
OVP threshold Factory default 115 % V
OUT
(Output voltage)
Over/Under
Voltage Protection,
OVP/UVP OVP/UVP fault response
time Factory default 25 µs
Set point accuracy Io -20 +20 %
OCP threshold Factory default 50 A
Over Current
Protection,
OCP OCP protection delay Factory default 45 µs
OTP threshold Factory default 120
Over Temperature
Protection,
OTP at T
P1
OTP hysteresis Factory default 15
°C
Logic Input/Output Characteristics
Logic input low threshold (V
IL
) 0.8 V
Logic input high threshold (V
IH
) CTRL, SCL, SDA, FLEX 2.0 V
Logic output low (V
OL
) SALERT, SCL, SDA, FLEX
I
OL
≤ 4 mA 0.4 V
Logic output high (V
OH
) SALERT, SCL, SDA, FLEX
I
OL
≥ -2 mA 2.25 V
Setup time, SMBus (t
set
) See Note 1 300 ns
Hold time, SMBus (t
hold
) See Note 1 250 ns
Note 1: See operation information section for I2C/SMBus Setup and Hold Times – Definitions
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
5
Ericsson Internal
PRODUCT SPEC 3 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
1.0V, 40A / 40W Electrical Specification BMR 451 XX02020X
T
P1
= -40 to +85ºC, V
I
= 4.5 to 14 V. Configuration: CDA 102 900/020, R
SET
= 19.6 kΩ.
Typical values given at: T
P1
= +25°C, V
I
= 12.0 V, max I
O
, unless otherwise specified under Conditions.
Additional C
I
= 470 µF. See Operating Information section for selection of capacitor types.
Sense pins are connected to the output pins.
Characteristics Conditions min typ max Unit
V
I
Input voltage range 4.5 14 V
V
Ioff
Turn-off input voltage Decreasing input voltage 4.0 V
V
Ion
Turn-on input voltage Increasing input voltage 4.4 V
P
O
Output power 40 W
50 % of max I
O
89.1
η Efficiency max I
O
86.5 %
P
d
Power dissipation 6.2 W
P
li
Input idling power I
O
= 0.01 A 0.9 W
P
RC
Input standby power Turned off with CTRL, see Note 3 145 mW
I
S
Static input current 3.9 A
V
Oi
Output voltage initial setting and
accuracy 0.990 1.000 1.010 V
Output voltage tolerance band 0.05 - 100 % of max I
O
0.985 1.015 V
Idling voltage I
O
= 0.01 A 1.000 V
Line regulation 4 mV
V
O
Load regulation 0.05 - 100 % of max I
O
3 mV
V
tr1
Load transient voltage deviation -35/+40 mV
t
tr1
Load transient recovery time
Load step 25-75-25 % of max I
O
,
di/dt = 2.5 A/µs with default
configuration and C
O
= 10 mF.
See Note 1 200 µs
C
O
Recommended external capacitance See Note 1 680 100 000 µF
t
r
Ramp-up time
(from 10−90 % of V
Oi
)
10 ms
t
s
Start-up time
(from V
I
connection to 90 % of V
Oi
)
0.05 - 100 % of max I
O
37 ms
1 ms
t
f
V
O
shut-down fall time
(from V
I
off to 10 % of V
O
)
I
O
= 2 A 50 ms
CTRL start-up time 20 ms
7 ms
t
CTRL
CTRL shut-down fall time
(From CTRL off to 10 % of V
O
)
I
O
= 2 A 17 ms
I
O
Output current 0.01 40 A
I
lim
Current limit threshold 41 48 A
I
sc
Short circuit current 50 A
V
Oac
Output ripple & noise See Note 2 20 mVp-p
Note 1: See Operating Information section for External Decoupling Capacitors.
Note 2: See Operating Information section for Output Ripple and Noise.
Note 3: The idling power can be reduced to typically 50 mW if monitoring is not needed. Please contact your local Ericsson Power Modules representative for custom configurations.
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
6
Ericsson Internal
PRODUCT SPEC 4 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
1.0V, 40A / 40W Typical Characteristics BMR 451 XX02020X
Efficiency Power Dissipation
70
75
80
85
90
95
0 8 16 24 32 40 [A]
[%]
4.5 V
5 V
12 V
14 V
0
2
4
6
8
10
0 8 16 24 32 40 [A]
[W]
4.5 V
5 V
12 V
14 V
Efficiency vs. load current and input voltage at T
P1
= +25
°
C.
Dissipated power vs. load current and input voltage at T
P1
= +25°C.
Output Current Derating
0
10
20
30
40
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.
0
10
20
30
40
0 20406080100
[°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
V
I
= 5 V. See Thermal Consideration section.
Available load current vs. ambient air temperature and airflow at
V
I
= 12 V. See Thermal Consideration section.
Output Characteristics Current Limit Characteristics
0,98
0,99
1,00
1,01
1,02
0 8 16 24 32 40 [A]
[V]
4.5 V
5 V
12 V
14 V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
30 35 40 45 50 [A]
[V]
4.5 V
5 V
12 V
14 V
O
utput voltage vs. load current at T
P1
= +25°C.
O
utput voltage vs. load current at T
P1
= +25°C.
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
7
Ericsson Internal
PRODUCT SPEC 5 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
1.0V, 40A / 40W Typical Characteristics BMR 451 XX02020X
Start-up Shut-down
Start-up enabled by connecting V
I
at:
T
P1
= +25°C, V
I
= 12 V,
I
O
= 40 A resistive load and 10 mF.
Top trace: output voltage (0.2 V/div.).
Bottom trace: input voltage (10 V/div.).
Time scale: (10 ms/div.).
Shut-down enabled by disconnecting V
I
at:
T
P1
= +25°C, V
I
= 12 V,
I
O
= 40 A resistive load.
Top trace: output voltage (0.2 V/div).
Bottom trace: input voltage (5 V/div.).
Time scale: (0.5 ms/div.).
Output Ripple & Noise Output Load Transient Response
Output voltage ripple at:
T
P1
= +25°C, V
I
= 12 V,
I
O
= 40 A resistive load.
Trace: output voltage (20 mV/div.).
Time scale: (2 µs/div.).
Output voltage response to load current
step-change (10-30-10 A) at:
T
P1
= +25°C, V
I
= 12 V, C
O
= 10 mF.
Top trace: output voltage (50 mV/div.).
Bottom trace: load current (10 A/div.).
Time scale: (0.5 ms/div.).
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
8
Ericsson Internal
PRODUCT SPEC 6 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
3.3V, 40A / 132W Electrical Specification BMR 451 XX02020X
T
P1
= -40 to +85ºC, V
I
= 4.5 to 14 V. Configuration: CDA 102 900/020, R
SET
= 1.21 kΩ.
Typical values given at: T
P1
= +25°C, V
I
= 12 V, max I
O
, unless otherwise specified under Conditions.
Additional C
I
= 470 µF. See Operating Information section for selection of capacitor types.
Sense pins are connected to the output pins.
Characteristics Conditions min typ max Unit
V
I
Input voltage range 4.5 14 V
V
Ioff
Turn-off input voltage Decreasing input voltage 4.0 V
V
Ion
Turn-on input voltage Increasing input voltage 4.4 V
P
O
Output power 132 W
50 % of max I
O
94.7
η Efficiency max I
O
94.1
%
P
d
Power dissipation 8.2 W
P
li
Input idling power I
O
= 0.01 A 2 W
P
RC
Input standby power Turned off with CTRL, see Note 3 145 mW
I
S
Static input current 6 A
V
Oi
Output voltage initial setting and
accuracy 3.285 3.300 3.315 V
Output voltage tolerance band 0.05 - 100 % of max I
O
3.250 3.350 V
Idling voltage I
O
= 0.01 A 3.300 V
Line regulation 4 mV
V
O
Load regulation 0.05 - 100 % of max I
O
3 mV
V
tr1
Load transient voltage deviation -100/+180 mV
t
tr1
Load transient recovery time
Load step 25-75-25 % of max I
O
,
di/dt = 2.5 A/µs with default
configuration and C
O
= 4 mF.
See Note 1 100 µs
C
O
Recommended external capacitance See Note 1 680 100 000 µF
t
r
Ramp-up time
(from 10−90 % of V
Oi
)
10 ms
t
s
Start-up time
(from V
I
connection to 90 % of V
Oi
)
0.05 - 100 % of max I
O
37 ms
200 µs
t
f
V
O
shut-down fall time.
(From V
I
off to 10 % of V
O
)
I
O
= 0.4 A 25 ms
CTRL start-up time 20 ms
10 ms
t
CTRL
CTRL shut-down fall time
(From CTRL off to 10 % of V
O
)
I
O
= 0.4 A 25 ms
I
O
Output current 0.01 40 A
I
lim
Current limit threshold 41 48 A
I
sc
Short circuit current 50 A
V
Oac
Output ripple & noise See Note 2 40 mVp-p
Note 1: See Operating Information section for External Decoupling Capacitors.
Note 2: See Operating Information section for Output Ripple and Noise.
Note 3: The idling power can be reduced to typically 50 mW if monitoring is not needed. Please contact your local Ericsson Power Modules representative for custom configurations.
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
9
Ericsson Internal
PRODUCT SPEC 7 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
3.3V, 40A / 132W Typical Characteristics BMR 451 XX02020X
Efficiency Power Dissipation
75
80
85
90
95
100
0 8 16 24 32 40 [A]
[%]
4.5 V
5 V
12 V
14 V
0
2
4
6
8
10
0 8 16 24 32 40 [A]
[W]
4.5 V
5 V
12 V
14 V
Efficiency vs. load current and input voltage at T
P1
= +25
°
C.
Dissipated power vs. load current and input voltage at
T
P1
= +25°C.
Output Current Derating
0
10
20
30
40
0 20406080100
[°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
V
I
= 12 V. See Thermal Consideration section.
Output Characteristics Current Limit Characteristics
3.28
3.29
3.30
3.31
3.32
0 8 16 24 32 40 [A]
[V]
4.5 V
5 V
12 V
14 V
0
1
2
3
4
30 35 40 45 50 [A]
[V]
4.5 V
5 V
12 V
14 V
O
utput voltage vs. load current at T
P1
= +25°C.
O
utput voltage vs. load current at T
P1
= +25°C.
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
10
Ericsson Internal
PRODUCT SPEC 8 (9)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 2/1301-BMR 451 00/02
Approved Checked Date Rev Reference
EAB/FJB/GMF Torbjörn Holmberg ETORHOL 2008-12-18 C
3.3V, 40A / 132W Typical Characteristics BMR 451 XX02020X
Start-up Shut-down
Start-up enabled by connecting V
I
at:
T
P1
= +25°C, V
I
= 12 V,
I
O
= 40 A resistive load and 4.4 mF.
Top trace: output voltage (2 V/div.).
Bottom trace: input voltage (5 V/div.).
Time scale: (10 ms/div.).
Shut-down enabled by disconnecting V
I
at:
T
P1
= +25°C, V
I
= 12 V,
I
O
= 40 A resistive load.
Top trace: output voltage (2 V/div).
Bottom trace: input voltage (5 V/div.).
Time scale: (2 ms/div.).
Output Ripple & Noise Output Load Transient Response
Output voltage ripple at:
T
P1
= +25°C, V
I
= 12 V,
I
O
= 40 A resistive load.
Trace: output voltage (50 mV/div.).
Time scale: (2 µs/div.).
Output voltage response to load current step-
change (10-30-10 A) at:
T
P1
= +25°C, V
I
= 12 V, C
O
= 4.4 mF.
Top trace: output voltage (100 mV/div.).
Bottom trace: load current (10 A/div.).
Time scale: (0.2 ms/div.).
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
11
Ericsson Internal
PRODUCT SPECIFICATION 1 (6)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 30/1301-BMR 451 00/02 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF EPKGELE ETORHOL 2008-12-18 B
EMC Specification
Conducted EMI measured according to test set-up and
standard MIL std 0141 – 58000.
The fundamental switching frequency is 320 kHz for
BMR 451.
Conducted EMI Input terminal value (typ)
EMI without filter
Test set-up
Layout Recommendations
The radiated EMI performance of the product will depend on
the PCB layout and ground layer design. It is also important to
consider the stand-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 PCB
and improve the high frequency EMC performance.
Output Ripple and Noise
Output ripple and noise is measured with the filter according to
figure below. A 50 mm conductor works as a small inductor
forming together with the two capacitances a damped filter.
Output ripple and noise test set-up.
Operating Information
Input Voltage
The input voltage range, 4.5 - 14 V, makes the products easy
to use in intermediate bus applications when powered by a
non-regulated bus converter or a regulated bus converter.
See Ordering Information for input voltage range.
Turn-off Input Voltage Range
The product monitors the input voltage and will turn-on and
turn-off at configured levels. The default turn-on input voltage
level setting is 4.4 V, whereas the corresponding turn-off input
voltage level is 4.0 V. Hence, the default hysteresis between
turn-on and turn-off input voltage is 0.4 V.
Remote Control
The product is equipped with a
remote control function, i.e., the
CTRL pin. The remote control can
be referenced to either the primary
negative input connection (GND) or
to an external voltage (Vext), which
is a 3 - 5 V positive supply voltage
in accordance with the SMBus
Specification version 2.0.
The CTRL function allows the product to be turned on/off by
an external device like a semiconductor or mechanical switch.
By default the product will turn on with the CTRL pin is left
open and turn off when the CTRL pin is applied to GND. The
CTRL pin has an internal pull-up resistor. The maximum
required sink current is 0.5 mA. When the CTRL pin is left
open, the voltage generated on the CTRL pin is max 6 V.
Please contact your local Ericsson Power Modules
representative for custom configurations.
Vout
+S
−S
GND
Ceramic
Capacitor
0.1 µF
Tantalum
Capacitor
10 µF
Load
50 mm conductor
50 mm conductor
BNC-contact to
oscillosco
p
e
CTRL
GND
Vext
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
12
Ericsson Internal
PRODUCT SPECIFICATION 2 (6)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 30/1301-BMR 451 00/02 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF EPKGELE ETORHOL 2008-12-18 B
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. The
products are designed for a stable operation (30 degrees
phase margin) without external capacitors connected to the
input or output. The performance in some applications can be
enhanced by addition of external capacitance as described
under External Capacitors. If the input voltage source contains
significant inductance, the addition of a 470 µF capacitor with
low ESR at the input of the product will ensure stable
operation.
External Decoupling Capacitors
Input capacitors:
The recommended input capacitor has a minimum
capacitance of 470 µF and a low ESR. The ripple current
rating of the capacitor must be at least 4 A rms. For high-
performance/transient applications or wherever the input
source performance is degraded, additional low ESR ceramic
type capacitors at the input is recommended. The additional
input low ESR capacitance above the minimum level insures
an optimized performance.
Output capacitors:
The recommended output capacitor has a minimum
capacitance of 680 µF and a low ESR. When powering loads
with significant dynamic current requirements, the voltage
regulation at the point of load can be improved by addition of
decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic and
electrolytic capacitors as close to the load as possible, using
several capacitors in parallel 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 high frequency noise at the load.
It is equally important to use low resistance and low
inductance PCB layouts and cabling.
External decoupling capacitors are a part of the control loop of
the product and may affect the stability margins. The ESR of
the capacitors is a very important parameter. Stable operation
is guaranteed for an ESR value of >5 m! and a total
capacitance in the range defined in the electrical specification.
For a total capacitance outside this range or with lower ESR a
re-configuration will be necessary for robust dynamic
operation and stability. Please contact your local Ericsson
Power Modules representative for custom configurations.
Control Loop Compensation
The product is configured with a robust control loop
compensation which allows for a wide range operation of input
and output voltages and capacitive loads as defined in the
electrical specification. Please contact your local Ericsson
Power Modules representative for custom configurations.
Load Transient Response Optimization
The product incorporates a Non-Linear transient Response,
NLR, loop that decreases the response time and the output
voltage deviation during a load transient. The NLR results in a
higher equivalent loop bandwidth than is possible using a
traditional linear control loop. The product is pre-configured
with appropriate NLR settings for robust and stable operation
for a wide range of input voltage and a capacitive load range
as defined in the electrical specification. For a specific input
voltage, and capacitive load, the NLR and control loop
compensation configuration can be optimized for a robust and
stable operation and with an improved load transient
response. Please contact your local Ericsson Power Modules
representative for custom configurations.
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
PCB 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 +S should be connected to
VOUT and "S should be connected to GND.
Output Voltage Adjust Range
With Analog Output Voltage Adjust the output voltage can be
set by an external resistor, R
SET
, which is applied between the
FLEX pin and the "S pin.
Analog output voltage adjust with external resistor.
FLEX
−S
RSET
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
13
Ericsson Internal
PRODUCT SPECIFICATION 3 (6)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 30/1301-BMR 451 00/02 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF EPKGELE ETORHOL 2008-12-18 B
The following table shows recommended resistor values for
R
SET
(1% tolerance resistors suggested).
Index V
OUT
[V] R
SET
[k#] Index V
OUT
[V] R
SET
[k#]
0 0.7 Open 14 0.991 21.5
1 0.752 110 15 1.00 19.6
2 0.758 100 16 1.10 16.2
3 0.765 90.9 17 1.158 13.3
4 0.772 82.5 18 1.20 12.1
5 0.79 75.0 19 1.25 9.09
6 0.80 56.2 20 1.50 7.50
7 0.821 51.1 21 1.669 5.62
8 0.834 46.4 22 1.80 4.64
9 0.848 42.2 23 2.295 2.87
10 0.88 34.8 24 2.506 2.37
11 0.899 31.6 25 3.30 1.21
12 0.919 28.7
13 0.965 23.7
Output Voltage Adjust using PMBus
Please contact your local Ericsson Power Modules
representative for custom configurations.
Synchronization
Not available in the current version.
Please contact your local Ericsson Power Modules
representative for custom configurations.
Interleaving
Not available in the current version.
Please contact your local Ericsson Power Modules
representative for custom configurations.
Parallel Operation
Parallel operation is not recommended.
Over Temperature Protection (OTP)
The products are protected from thermal overload by an
internal over temperature shutdown circuit.
When T
P1
as defined in thermal consideration section exceeds
120°C 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 >15°C below the temperature threshold. Please
contact your local Ericsson Power Modules representative for
custom configurations.
Over Current Protection (OCP)
The product includes current limiting circuitry for protection at
continuous overload. The product will shut down immediately
for output currents in excess of the current limit, I
lim
. The
product will try to restart every 70 ms, i.e., hiccup mode, and
resume normal operation after removal of the overload. The
load distribution should be designed for the maximum output
short circuit current specified. Please contact your local
Ericsson Power Modules representative for custom
configurations.
Soft-start Power Up
The soft-start control introduces a time-delay (default setting 10
ms) before allowing the output voltage to rise. The default rise
time of the ramp up is 10 ms. Power-up is hence completed
within 20 ms in default configuration using remote control.
When starting by applying input voltage the control circuit boot-
up time adds an additional 10 ms delay. Please contact your
local Ericsson Power Modules representative for custom
configurations.
Margin Up/Down Controls
Not available in the current version.
Please contact your local Ericsson Power Modules
representative for custom configurations.
Pre-Bias Startup Capability
Pre-bias startup often occurs in complex digital systems when
current from another power source is fed back through a dual-
supply logic component, such as FPGA or ASIC.
The BMR 451 product family incorporates synchronous
rectifiers, but will not sink current during startup, or turn off, or
whenever a fault shuts down the product in a pre-bias
condition. Please contact your local Ericsson Power Modules
representative for custom configurations.
I
2
C/SMBus Setup and Hold Times – Definitions
The setup time, t
set
, is the time the data, SDA, must be stable
before the rising edge of the clock signal, SCL. The hold time
t
hold
, is the time the data must be stable after the rising edge of
the clock signal, SCL. If these times are violated incorrect data
can be captured or meta-stability can occur and the bus
communication fails.
SCL
SDA
t
set
t
hold
V
IH
V
IL
V
IH
V
IL
SMBus timing diagram
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
14
Ericsson Internal
PRODUCT SPECIFICATION 4 (6)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 30/1301-BMR 451 00/02 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF EPKGELE ETORHOL 2008-12-18 B
Thermal Consideration
General
The regulators are designed to operate in different thermal
environments and sufficient cooling must be provided to
ensure reliable operation. Cooling is achieved mainly by
conduction, from the pins to the host board, and convection,
which is dependant on the airflow across the regulator.
Increased airflow enhances the cooling of the regulator.
The Output Current Derating graph found in the Output section
for each model provides the available output current vs.
ambient air temperature and air velocity at specified V
I
.
The product is tested on a 254 x 254 mm, 35 µm (1 oz),
8-layer test board mounted vertically in a wind tunnel with a
cross-section of 608 x 203 mm.
Proper cooling of the product can be verified by measuring the
temperature at position P1. The temperature at this position
should not exceed the max values provided in the table below.
The number of points may vary with different thermal design
and topology.
Note that the max value is the absolute maximum rating
(non destruction) and that the electrical Output data is
guaranteed up to T
P1
equal to 85 degrees.
See Design Note 019 for further information.
Position Device Designation Max value
P1 L1 T
P1
120º C
Temperature positions and air flow direction.
Definition of Reference Temperature T
P1
The reference temperature is used to monitor the temperature
limits of the product. Temperature above maximum T
P1
,
meassured at the reference point P1 are not allowed and may
cause degradation or permanent damage to the product. T
P1
is
also used to define the temperature range for normal operating
conditions. T
P1
is defined by the design and used to guarantee
safety margins, proper operation and high reliability ot the
product.
Power Management Overview
The product incorporates a wide range of monitorable 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, and internal temperature.
Monitoring parameters can be configured to provide alerts for
specific conditions. Please contact your local Ericsson Power
Modules representative for custom configurations.
Connections
Pin layout, top view.
Pin Designation Function
1A, 1B VIN Input Voltage
2A, 2B GND Power Ground
3A, 3B VOUT Output Voltage
4A +S Plus sense
4B "S Minus sense
5A SA0 Address pin 0
5B SA1 Address pin 1
6A SCL PMBus Clock
6B SDA PMBus Data
7A FLEX Analog voltage adjust
7B DGND PMBus Ground
8A SALERT PMBus Alert
8B CTRL
PMBus Control
(Remote Control)
P1
Air
flow
Bottom view
Top view
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
15
Ericsson Internal
PRODUCT SPECIFICATION 5 (6)
Prepared (also subject responsible if other) No.
EAB/FJB/GMF ETORHOL, EKAMAGN, EJANARV 30/1301-BMR 451 00/02 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF EPKGELE ETORHOL 2008-12-18 B
Typical Application Circuit
The resistors, R
SA0
and R
SA1
, are used for adressing, described in
section Adressing.
1A,B
2A,B
3A,B
8A
8B
7A 7B
6A 6B
5A 5B
4A 4B
−
Load
+
CO
+
−
Supply
+
+
CI
RSET
CTRL
PMBus (SALERT,
SDA, SCL, DGND)
RSA0 R
SA1
BMR 451
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
16
Ericsson Confidential
PRODUCT SPECIFICATION 1 (3)
Prepared (also subject responsible if other) No.
EAB/FJB/GKF ETORHOL/EKAMAGN 31/1301-BMR 451 0002
Approved Checked Date Rev Reference
EAB/FJB/GKF Torbjörn Holmberg ECHAWAL 2008-12-02 A
PMBus Interface
The DC/DC regulators provid e a PMBus digital interface that
enables the user to monitor the inp ut and o utput parameters.
The products can be used with any standard 2-wire I2C or
SMBus host device. In addition, the device is compatible with
PMBus version 1.1 and includes an SALERT line to help
mitigate bandwidth limitations related to continuous fault
monitoring.
Monitoring via PMBus
A system controller can monitor a wide variety of differe nt
parameters through the PMBus interface. The controller can
monitor for fault condition 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 for any number of power conversion
parameters including but not limited to the following:
• Input voltage
• Output voltage
• Output current
• Internal junction temperature
• Switching frequency
• Duty cycle
Evaluation software
For the DC/DC regulators Ericsson provides an evaluation
software, called CMM.
For more information please contact your local
Ericsson sales representative.
Addressing
The PMBus address should be config ured with resistors
connected between SA0 and SA1 pin to the –S pin, as shown
in the figure. Recommended resistor values for hard-wiring
PMBus addresses (series E96, 1% tolerance resistors
suggested) are shown in the table.
Schematic of connection of address resistors.
SA0/SA1 Index RSA0/RSA1 [kΩ] SA0/SA1 Index RSA0/RSA1 [kΩ]
0 10 13 34.8
1 11 14 38.3
2 12.1 15 42.2
3 13.3 16 46.4
4 14.7 17 51.1
5 16.2 18 56.2
6 17.8 19 61.9
7 19.6 20 68.1
8 21.5 21 75
9 23.7 22 82.5
10 26.1 23 90.9
11 28.7 24 100
12 31.6
The PMBus address follo ws the equation b elow:
PMBus Address = 25 x (SA1 index) + (SA0 index)
The user can theoretically configure up to 625 unique PMBus
addresses, however the PMBus address ran ge is inherently
limited to 128. Therefore, the user should use index values 0 -
4 on the SA1 pin and the full range of ind ex values on the SA0
pin, which will provide 125 device address combinations. The
user shall also be aware of further limitations of the address
space as stated in the SMBus Specification.
SA0
SA1
−S
RSA0 RSA1
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
17
Ericsson Confidential
PRODUCT SPECIFICATION 2 (3)
Prepared (also subject responsible if other) No.
EAB/FJB/GKF ETORHOL/EKAMAGN 31/1301-BMR 451 0002
Approved Checked Date Rev Reference
EAB/FJB/GKF Torbjörn Holmberg ECHAWAL 2008-12-02 A
PMBus Read Commands
The DC/DC regulators are PMBus compliant. The following table
lists the implemented read PMBus commands. For more detailed
information see PMBus Power System Management Proto col
Specification; Part I – General Requir ements, Transport and
Electrical Interface and PMBus Power System Management
Protocol; Part II – Command Language.
Designation Cmd Impl
Standard PMBus Commands
Status Commands
CLEAR_FAULTS 03h Yes
STATUS_BYTES 78h Yes
STATUS_WORD 79h Yes
STATUS_VOUT 7Ah Yes
STATUS_IOUT 7Bh Yes
STATUS_INPUT 7Ch Yes
STATUS_TEMPERATURE 7Dh Yes
Monitor Commands
READ_VIN 88h Yes
READ_VOUT 8Bh Yes
READ_IOUT 8Ch Yes
READ_TEMPERATURE_1 8Dh Yes
READ_TEMPERATURE_2 8Eh No
READ_FAN_SPEED_1 90h No
READ_DUTY_CYCLE 94h Yes
Identification Commands
PMBUS_REVISION 98h Yes
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
RESTORE_DEFAULT_ALL 12h No
RESTORE_USER_ALL 16h No
Notes:
Cmd is short for Command.
Impl is short for Implemented.
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
18
Ericsson Internal
PRODUCT SPEC. MECHANICAL 1 (3)
Prepared (also subject responsible if other) No.
EPETSCH 4/1301 BMR 451 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF [Görel Eriksson] See §1 2008-10-01 A
Mechanical Information — Hole Mount , Open Frame Version
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
19
Ericsson Internal
PRODUCT SPEC. MECHANICAL 2 (3)
Prepared (also subject responsible if other) No.
EPETSCH 4/1301 BMR 451 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF [Görel Eriksson] See §1 2008-10-01 A
Mechanical Information — Surface Mount Version
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
20
Ericsson Internal
PRODUCT SPEC. 1 (4)
Prepared (also subject responsible if other) No.
EPETSCH 5/1301 BMR 451 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF [G Eriksson] See §1 2008-10-02 A
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 sufficientl
y
extended preheat time to ensure an even temperature across
the host PCB 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 cleanin
g
residues ma
y
affect
long time reliability and isolation voltage.
Minimum Pin Temperature Recommendations
Pin number 3A is 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, (T
L
, 183°C for
Sn63Pb37) for more than 30 seconds and a peak
temperature of 210°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.
General reflow process specifications SnPb eutectic Pb-free
Average ramp-up (T
PRODUCT
) 3°C/s max 3°C/s max
Typical solder melting (liquidus)
temperature T
L
183°C 221°C
Minimum reflow time above T
L
30 s 30 s
Minimum pin temperature T
PIN
210°C 235°C
Peak product temperature T
PRODUCT
225°C 260°C
Average ramp-down (T
PRODUCT
) 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
Lead-free (Pb-free) solder processes
For Pb-free solder processes, a pin temperature (T
PIN
)
in excess
of the solder melting temperature (T
L
, 217 to 221°C for SnA
g
Cu
solder alloys) for more than 30 seconds and a peak
temperature of 235°C on all solder joints is recommended to
ensure a reliable solder joint.
Maximum Product Temperature Requirements
Top of the product PCB near pin 8B is chosen as reference
location for the maximum (peak) allowed product temperature
(T
PRODUCT
) 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 T
PRODUCT
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 T
PRODUCT
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
Pin 3A for measurement of minimum Pin (solder joint) temperature
T
PIN
Pin 8B for measurement of maximum product temperature T
PRODUCT
E
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
21
Ericsson Internal
PRODUCT SPEC. 2 (4)
Prepared (also subject responsible if other) No.
EPETSCH 5/1301 BMR 451 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF [G Eriksson] See §1 2008-10-02 A
Soldering Information - Hole Mounting
The hole mounted product is intended for plated throu
g
h hole
mounting by wave or manual soldering. 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 cleanin
g
residues ma
y
affect
long time reliability and isolation voltage.
Delivery Package Information
The products are delivered in antistatic injection molded tra
y
s
(Jedec design guide 4.10D standard).
Tray Specifications
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 14.50 mm 0.571 [inch]
Box capacity 150 products (5 full trays/box)
Tray weight 160 g empty, 475 g full tray
JEDEC standard tray for 3x10 = 30 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
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
22
Ericsson Internal
PRODUCT SPEC. 3 (4)
Prepared (also subject responsible if other) No.
EPETSCH 5/1301 BMR 451 Uen
Approved Checked Date Rev Reference
EAB/FJB/GMF [G Eriksson] See §1 2008-10-02 A
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
1000
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 g
2
/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
BMR 451
DC/DC Regulators, Input 4.5-14V, Output 40 A/132 W
EN/LZT 146 401 R1B January 2009
© Ericsson AB
Technical Specification
23
