Features
DATEL’s BMP Models are fully potted, 25-40 Watt, dual-output DC/DC convert-
ers designed to meet UL1950 and EN60950-1 safety standards. The
combination the BMP’s higher effi ciencies and thermally conductive potting com-
pound enables these devices to achieve higher operating temperatures
without derating. The 2" x 3" BMP "footprint" conforms to the standard pinout
and pin geometries of most 3" x 3" devices (a 33% space savings) while
delivering 60% more power (40W vs. 25W).
Applicable to a wide range of telecom, computer and other OEM applications,
BMP Model DC/DC’s offer ±5V, ±12V and ±15V outputs. They operate from four
different input voltage ranges with total available output being a function of the
selected range. "Q12" models operate from 10-36V and deliver 25W. "Q48" models
operate from 18-75V and deliver 30W. For "D24" and "D48" models, the input
ranges and output powers are 18-36V at 35W and 36-75V at 40W, respectively.
These devices employ corrosion-resistant metal cases with plastic headers.
Heat-generating transformer cores and power semiconductors are mounted directly
to the cases, which have threaded inserts for optional add-on heat sinks or pcb
mounting. Temperature derating information is provided for operation with and with-
out heat sinks and forced air fl ow.
All devices feature input pi fi lters, input overvoltage shutdown, output overvolt-
age protection, output current limiting, and thermal shutdown. UL, CSA, EN and IEC
compliance testing is currently in progress (75V-input devices will be CE marked) as
are full EMI/EMC characterizations. Contact DATEL for the latest available informa-
tion.
Figure 1. Simplifi ed Schematic
OPTO
ISOLATION
REFERENCE &
ERROR
AMPLIFIER
PWM
CONTROLLER
+V
IN
–
V
IN
ON/OFF
CONTROL TRIM
COMMON
+V
OUT
–
V
OUT
CASE
–
V
IN
PWM
■
■
■
■
■
■
■
■
■
■
■
■
■
■
Higher operating temperatures
Fully potted
Designed to meet UL1950 and
EN60950-1 (basic insulation)
mark available (75V-input models)
Fully isolated, 1500Vdc guaranteed
25/30/35/40W output power
Standard pinout! Smaller size!
New 2" x 3" package fi ts 3" x 3" footprint
±5V, ±12V or ±15V outputs
Four input voltage ranges:
10-36V, 18-36V
18-75V, 36-75V
High effi ciencies (to 88%)
Fully I/O protected
VOUT trim and on/off control
Modifi cations and customs for OEM’s
Typical topology is shown
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 1 of 7
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For full details go to
www.murata-ps.com/rohs
As shown below, BMP Model DC/DC Converters are classifi ed by output
power. For dual-output devices, the total output power from the two outputs
can not exceed the rated power. For example, "Q48" models have a maxi-
mum output power of 30W. Therefore, if the +Output is sourcing 20 Watts,
the –Output is limited to sourcing 10 Watts ensuring the total output power
does not exceed 30 Watts.
Output Confi guration:
B = Bipolar
Nominal Output Voltages:
±5, ±12 or ±15 Volts
5B MP 4
-/D48
-
Input Voltage Range:
Q12 = 10-36 Volts (24V nominal)
D24 = 18-36 Volts (24V nominal)
Q48 = 18-75 Volts (48V nominal)
D48 = 36-75 Volts (48V nominal)
Maximum Output Current
in Amps from each output
Fully Potted Metal Package
➀ Typical at TA = +25°C under nominal line voltage and balanced "full-load" conditions unless otherwise noted.
For BMP devices, "full load" is a function of each device's input voltage range. See Output Power Considerations and Technical Notes for more details.
➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth.
➂ Balanced loads, 10% to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
Performance Specifi cations and Ordering Guide
R/N (mVp-p) ➁
Load ➂
VOUT
(Volts)
Package
(Case,
Pinout)
Effi ciency
Regulation (Max.)
Line
VIN Nom.
(Volts)
Range
(Volts)
Model
IIN ➃
(mA)
➀
Max.
Typ. Typ.
Min.
BMP-5/4-Q12 ±5 ±4 60 120 ±0.5% ±1% 24 10-36 15/1225 82% 85% C11, P15
BMP-5/4-D24 ±5 ±4 75 125 ±0.5% ±1% 24 18-36 15/1696 84% 86% C11, P15
BMP-5/4-Q48 ±5 ±4 75 125 ±0.5% ±1% 48 18-75 25/735 82% 85% C11, P15
BMP-5/4-D48 ±5 ±4 75 125 ±0.5% ±1% 48 36-75 20/980 83% 85% C11, P15
BMP-12/1.65-Q12 ±12 ±1.65 60 100 ±0.5% ±1% 24 10-36 20/1224 83% 85% C11, P15
BMP-12/1.65-D24 ±12 ±1.65 60 100 ±0.5% ±1% 24 18-36 15/1667 85% 87% C11, P15
BMP-12/1.65-Q48 ±12 ±1.65 75 120 ±0.5% ±1% 48 18-75 15/727 84% 86% C11, P15
BMP-12/1.65-D48 ±12 ±1.65 75 125 ±0.5% ±1% 48 36-75 15/948 85% 87% C11, P15
BMP-15/1.3-Q12 ±15 ±1.3 60 125 ±0.5% ±1% 24 10-36 20/1225 83% 85% C11, P15
BMP-15/1.3-D24 ±15 ±1.3 60 125 ±0.5% ±1% 24 18-36 15/1648 85% 88% C11, P15
BMP-15/1.3-Q48 ±15 ±1.3 75 125 ±0.5% ±1% 48 18-75 25/727 84% 86% C11, P15
BMP-15/1.3-D48 ±15 ±1.3 60 125 ±0.5% ±1% 48 36-75 20/934 84% 87% C11, P15
IOUT
(Amps)
PART NUMBER STRUCTURE
Model Maximum Output Power
Q12 25 Watts
Q48 30 Watts
D24 35 Watts
D48 40 Watts
OUTPUT POWER CONSIDERATIONS
Output Input
RoHS-6 compliant*
C
* Contact Murata Power Solutions
(Datel) for availability.
-
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 2 of 7
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7
6
8
9
4
1
2
3
510
METAL
CASE
BOTTOM VIEW
INSULATED
BASE
(4) THREADED INSERTS
#4-40 THD THRU
1.200
(30.48)
2.500
(63.50)
2.04
(51.82)
0.20 MIN
(5.08)
1.600
(40.64)
4 EQ. SP. @
0.400 (10.16)
0.55
(13.97)
0.040 ±0.002 DIA.
(1.016 ±0.051)
2.600
(66.04) 0.22
(5.59)
0.22
(5.59)
0.27
(6.86)
0.42
(10.67)
3.04
(77.22)
DIMENSIONS ARE IN INCHES (MM)
MECHANICAL SPECIFICATIONS
Case C11
2.600
(66.04)
0.20
(5.08)
2.00
(50.80)
1.200
(30.48)
3.00
(76.20)
0.50
(12.70)
0.40
(10.16)
0.10
(2.54)
0.120 DIA. (3.048)
(4 PLACES)
MATERIAL: BLACK ANODIZED ALUMINUM
4 MOUNTING SC R EW S AND 0.009 (0.229) THERMAL PAD INCLU DED
TOP VIEW
Optional Heat Sink Kit
(Part Number HS-23 <non-RoHS> or HS-23-C <RoHS>)
I/O Connections
Function P15
No Pin
–Input
+Input
Case
On/Off Control*
–Output
No Pin
Common
+Output
Tr i m
Pin
1
2
3
4
5
6
7
8
9
10
* See note 4 on next page.
Third Angle Projection
Dimensions are in inches (mm shown for ref. only).
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 3 of 7
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Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating." Any
BMP model may be confi gured to produce an output of 10V, 24V or 30V (for
±5V, ±12V or ±15V models, respectively) by applying the load across the
+Output and –Output (pins 9 and 6), with either output grounded. The Com-
mon (pin 8) should be left open. Minimum 20% loading is recommended
under these conditions. The total output voltage span may be externally
trimmed as described below.
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and "full-load" conditions, unless noted. ➀ ➁
Input
Input Voltage Range:
Q12 Models 10-36 Volts (24V nominal)
D24 Models 18-36 Volts (24V nominal)
Q48 Models 18-75 Volts (48V nominal)
D48 Models 36-75 Volts (48V nominal)
Input Current See Ordering Guide
Input Filter Type ➂ Pi
Overvoltage Shutdown:
Q12 and D24 Models 40 Volts
Q48 and D48 Models 80 Volts
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
On/Off Control (Pin 5) ➃ TTL high (or open) = on, low = off
Output
VOUT Accuracy (50% load) ±1%, maximum
Temperature Coeffi cient ±0.02% per °C
Ripple/Noise (20MHz BW) ➂ See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage ➄ 1500Vdc, minimum
Isolation Capacitance 620pF
Current Limiting Continuous, auto-recovery
Overvoltage Protection Zener/transorb clamps, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 300μsec max. to ±1.5% of fi nal value
Switching Frequency 125kHz (±10%)
Environmental
Operating Temperature (ambient):
Without Derating –40 to +60°C (Model dependent)
With Derating to +90°C (See Derating Curves)
Maximum Case Temperature +90°C
Storage Temperature –40 to +105°C
Relative Humidity To 85°C /85% RH, non-condensing
Physical
Safety Designed to meet UL/cUL/EN/IEC 60950-1
Dimensions 2.04" x 3.04" x 0.55" (51.8 x 77.2 x 14mm)
Shielding 5-sided
Case Connection Pin 4
Case Material Aluminum, black anodized fi nish
with plastic header
Flammability Rating UL94V-0
Pin Material Gold-plated copper alloy with nickel
underplate
Weight 6 ounces (170 grams)
➀ These converters require a minimum 10% loading on each output to maintain
specifi ed regulation. Operation under no-load conditions will not damage these devices;
however they may not meet all listed specifi cations.
➁ "Full load" varies by part number and is determined by the input voltage range as indi
cated by the part number suffi x. See Technical Notes and Output Power Considerations.
➂ Application-specifi c input/output fi ltering can be recommended or perhaps added inter
nally upon request. Contact DATEL Applications Engineering for details.
➃ Applying a voltage to the On/Off Control pin when no input power is applied to the con
verter can cause permanent damage to the converter.
➄ Listed specifi cation is for input-to-output isolation. Input-to-case and output-to-case
isolation is 1000Vdc, minimum.
Filtering and Noise Reduction
All BMP 25-40 Watt DC/DC Converters achieve their rated ripple and noise
specifi cations without the use of external input/output capacitors. In criti-
cal applications, input/output ripple and noise may be further reduced by
installing electrolytic capacitors across the input terminals and/or low-ESR
tantalum or electrolytic capacitors across the output terminals. Output
capacitors should be connected between their respective output pin (pin 6 or
9) and Common (pin 8). See Figure 7. The caps should be located as close
to the converters as possible. Typical values are listed in the below. In many
applications, using values greater than those listed will yield better results.
To Reduce Input Ripple
"Q12, D24" Models 47μF, 50V
"Q48, D48" Models 10μF, 100V
To Reduce Output Ripple
±5V Outputs 47μF, 10V, Low ESR
±12/15V Outputs 22μF, 20V, Low ESR
Input Voltage:
Q12/D24 Models 44 Volts
Q48/D48 Models 88 Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection
±5V Outputs 6.8 Volts, limited duration
±12V Outputs 15 Volts, limited duration
±15V Outputs 18 Volts, limited duration
Output Current Current limited. Max. current and
short-circuit duration are model
dependent.
Storage Temperature –40 to +105°C
Lead Temperature See soldering guidelines
These are stress ratings. Exposure of devices to greater than any of these conditions may
adversely affect long-term reliability. Proper operation under conditions other than those
listed in the Performance/Functional Specifi cations Table is not implied.
Absolute Maximum Ratings
TECHNICAL NOTES
VIN Range Q12 D24 Q48 D48
Fuse Value 4A 4A 3A 2A
Input Fusing
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 4 of 7
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Temperature Derating and Electrical Performance Curves
Q12 Models (25 Watts)
Output Power (Watts)
Ambient Temperature (°C)
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Power (Watts)
Ambient Temperature (°C)
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9
0
Figure 2a. Temperature Derating Without Heat Sink Figure 2b. Temperature Derating With Heat Sink
Output Power (Watts)
Ambient Temperature (°C)
30
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9
0
Output Power (Watts)
Ambient Temperature (°C)
30
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9
0
Figure 3a. Temperature Derating Without Heat Sink Figure 3b. Temperature Derating With Heat Sink
Q48 Models (30 Watts)
Output Power (Watts)
Ambient Tem
p
erature
(
°C
)
35
30
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Output Power (Watts)
Ambient Temperature (°C)
35
30
25
20
15
10
5
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Figure 4a. Temperature Derating Without Heat Sink Figure 4b. Temperature Derating With Heat Sink
D24 Models (35 Watts)
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 5 of 7
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40
35
30
25
20
15
10
5
0
Output Power (Watts)
Ambient Tem
p
erature
(
°C
)
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Figure 5a. Temperature Derating Without Heat Sink Figure 5b. Temperature Derating With Heat Sink
D48 Models (40 Watts)
Output Power (Watts)
Ambient Tem
p
erature
(
°C
)
40
35
30
25
20
15
10
5
0
–40 0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 9
0
Natural Convection Cooling
150 Linear Feet Per Minute
300 Linear Feet Per Minute
Temperature Derating and Electrical Performance Curves
Output Power
BMP Model, dual-output DC/DC converters incorporate a design tradeoff be-
tween total available output power and input voltage range. The total available
power is a function of both the nominal input voltage and the "width" of the
input voltage range. For a given nominal input (24V or 48V), narrower ranges
(2:1 vs. 4:1) have more available power. For a given "width" of input range
(2:1 or 4:1), higher nominal inputs (48V vs. 24V) have more available power.
Each device, as indicated by its part-number suffi x (Q12, Q48, D24 or D48)
has a total output power limitation of 25, 30, 35 or 40 Watts, respectively.
Observing these power limitations is the user's responsibility.
As indicated by its Part Number Structure, each ±5V, ±12V or ±15V BMP
device is capable of sourcing up to ±4, ±1.65 or ±1.3 Amps, respectively.
Users have the fl exibility of loading either output up to these limits; however
you must be extremely careful not to exceed the total output power rating of
any given device. If, for example, a ±5V device with a 30W power rating
(BMP-5/4-Q48) is sourcing 4A from its +5V output (representing 20W of
+Output power), that device can only supply an additional 10W (2 Amps)
from its –Output.
As a consequence of this "power-allocation" fl exibility, the defi nition of "full
load," as the condition under which performance specifi cations are tested
and listed, is ambiguous. The following table lists the positive and negative
output currents that DATEL uses to defi ne each device’s "full load."
Threaded Inserts and Heatsink Installation
CAUTION: Do not use the threaded inserts to bolt the converter down to a
PC board. That will place unnecessary force on the mounting pins. Instead,
the converter is held securely by only soldering the mounting pins.
When attaching the heat sink from above the converter, use a maximum
torque of 2 inch-pounds (0.23 N-m) on the 4-40 bolts to avoid damaging the
threaded inserts. Use a tiny amount of fastener adhesive or 4-40 lockwashers
to secure the bolts.
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing these converters. These specifi cations vary depending on the solder type. Exceeding these
specifi cations may cause damage to the product. Be cautious when there is high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for 30 minutes). Your
production environment may differ; therefore please thoroughly review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products (THMT)
For Sn/Ag/Cu based solders: For Sn/Pb based solders:
Maximum Preheat Temperature 115° C. Maximum Preheat Temperature 105° C.
Maximum Pot Temperature 270° C. Maximum Pot Temperature 250° C.
Maximum Solder Dwell Time 7 seconds Maximum Solder Dwell Time 6 seconds
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 6 of 7
www.murata-ps.com/support
Figure 7. Using External Capacitors
to Reduce Input/Output Ripple/Noise
–OUTPUT
+INPUT
–INPUT
+OUTPUT
3
2
9
6
COMMON
8
C
IN
C
OUT
C
OUT
+
+
+
Figure 8. Trim Connections Using a Trimpot
20k9
5-10
Turns
+INPUT
–INPUT
TRIM
COMMON
3
2
9
6
8
LOAD
LOAD
10
–OUTPUT
+OUTPUT
+INPUT
–INPUT
3
2
+10V
10k9
5
ON/OFF
CONTROL
Figure 6. Driving the On/Off Control Pin
Voltage Output
Model Number Range Power ±5V Currents ±12V Currents ±15V Currents
BMP-5/4-Q12 10-36V 25 Watts ±2.5A (25W) – –
BMP-5/4-Q48 18-75V 30 Watts ±3A (30W) – –
BMP-5/4-D24 18-36V 35 Watts ±3.5A (35W) – –
BMP-5/4-D48 36-75V 40 Watts ±4A (40W) – –
BMP-12/1.65-Q12 10-36V 25 Watts – ±1.04A (24.96W) –
BMP-12/1.65-Q48 18-75V 30 Watts – ±1.25A (30W) –
BMP-12/1.65-D24 18-36V 35 Watts – ±1.46A (35W) –
BMP-12/1.65-D48 36-75V 40 Watts – ±1.67A (40.1W) –
BMP-15/1.3-Q12 10-36V 25 Watts – – ±833mA (24.99W)
BMP-15/1.3-Q48 18-75V 30 Watts – – ±1A (30W)
BMP-15/1.3-D24 18-36V 35 Watts – – ±1.17A (35.1W)
BMP-15/1.3-D48 36-75V 40 Watts – – ±1.33A (39.9W)
Defi nition of "Full Load" for Specifi cation Purposes
Table 1. Output Currents Comprising "Full Load"
BMP Models
25-40W, Dual Output, DC/DC Converters
MDC_BMP25-40W.C02 Page 7 of 7
www.murata-ps.com/support
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without
notice. © 2012 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
