BCP Models
www.murata-ps.com
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
OBSOLETE PRODUCT
Last time buy: 04 January 2013
FEATURES
PRODUCT OVERVIEW
Independent 5V and 3.3V outputs
As your new, mixed-logic (5V and 3.3V) design
evolves and your current requirements change,
your new DC/DC converter will not. Murata Power
Solutions' BCP-5/15-3.3/15-D24 (18-36V input)
and BCP-5/15-3.3/15-D48 (36-75V input) are fully
isolated DC/DC converters providing both 5V and
3.3V outputs. Housed in standard "half-brick"
packages (2.3" x 2.4" x 0.525"), the BCP’s can
support any combination of 5V and 3.3V loading
up to a combined total of 15 Amps. Both outputs
are fully isolated (1500Vdc) and independently line
(±0.2%) and load (±0.5% and ±0.6%) regulated.
Both BCP models feature input pi filters, input
undervoltage and overvoltage shutdown, input
reverse-polarity protection, output overvoltage
Each output fully regulated
No minimum load requirements
Up to 15 Amps per output
75 Watts total output power
Standard "half-brick" package
UL1950, EN60950-1 and VDE safety
approvals (BASIC insulation)
Fully isolated, 1500Vdc guaranteed
18-36V or 36-75V input ranges
CE mark available (75V-input models)
Input under and overvoltage shutdown
protection, current limiting, and thermal shutdown.
Each has an on/off control function, and the two
output voltages can be trimmed independently.
BCP Model DC/DC’s deliver low noise
(50mVp-p), high efficiency (87%) and are fully
specified for –40 to +100°C operation. Utilization of
metal baseplate technology with threaded inserts
permits easy heat-sink attachment and/or pcb
mounting. These devices meet IEC950, UL1950,
EN60950-1 and VDE safety standards, including BASIC insulation requirements. CB reports
are available on request. "D48" models are CE
marked (meet the requirements of LVD). Selected
models are available with RoHS-6 hazardous
substance compliance.
Continuous short-circuit protection
Thermal shutdown
SIMPLIFIED SCHEMATIC
+5V OUTPUT
(7)
+INPUT
(4)
SWITCH
CONTROL
5V RETURN (6)
+3.3V OUTPUT
(10)
–INPUT
(1)
3.3V RETURN
(9)
MAG AMP
CONTROLLER
ON/OFF
CONTROL
(3)
PWM
CONTROLLER
For full details go to
www.murata-ps.com/rohs
UV & OV
COMPARATORS
OPTO
ISOLATION
REFERENCE &
ERROR AMP
REFERENCE &
ERROR AMP
3.3V TRIM
(8)
5V TRIM
(5)
Typical topology is shown
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MDC_BCP_75W.B06 Page 1 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE
Output
Model Family
BCP-5/15-3.3/15-D24P-C
BCP-5/15-3.3/15-D48N-C
VOUT
(V)
IOUT
(A)
5
R/N (mVp-p)
Input
Regulation (Max.)
Typ.
Max.
Line
Load
15
50
100
±0.2%
±0.5%
3.3
15
50
100
±0.2%
±0.6%
5
15
50
100
±0.2%
±0.5%
3.3
15
50
100
±0.2%
±0.6%
Typical at TA = +25°C under nominal line voltage and balanced "full-load" (5V @7.5A, 3.3V @ 7.5A)
conditions unless otherwise noted.
Ripple/Noise (R/N) measured over a 20MHz bandwidth. All models are specified with 22µF,
low-ESR, input capacitor and 10µF tantalum in parallel with 1µF ceramic output capacitors.
No load to 100% load, other output at no-load.
VIN Nom.
(V)
Range
(V)
IIN
(mA)
Min.
Typ.
Package
(Case/
Pinout)
24
18-36
215/3720
84%
87.2%
C19, P29
48
36-75
125/1860
84%
88%
C19, P29
Efficiency
Nominal line voltage, no-load/5V at full-load condition.
Current from either output at maximum value, or both outputs to a combined total of 15 A.
5V at full-load condition.
Please refer to the Part Number Structure for additional options when ordering.
PART NUMBER STRUCTURE
BCP - 5 / 15 - 3.3 / 15 - D24 N H LX - T - C
Dual Output/
Standard Half-Brick
V1 Nominal Output Voltage: 5V
I1 Maximum Output Current: 15A
RoHS Hazardous
Substance Compliance
Special Trim Versions:
BCP-5/15-3.3/15-D48 only
(Quantity order only)
V2 Nominal Output Voltage: 3.3V
I2 Maximum Output Current: 15A
Optional Functions:
See also last page
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
Optional Functions—Refer to last page for additional options:
Blank On/Off Control function (positive polarity) pin 3
N
On/Off Control function (negative polarity) pin 3
L1
Pin length: 0.110 in. (2.79mm) ±0.010, quantity order
L2
Pin length: 0.145 in. (3.68mm) ±0.010, quantity order
-Y
RoHS-5 Hazardous substance compliance, with lead
-C
RoHS-6 Hazardous substance compliance, no lead
-H
Conformal Coating (special order):
Blank = no coating, standard
H = coating added, special order
Note: Some model number
combinations may not be available.
Contact Murata Power Solutions.
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MDC_BCP_75W.B06 Page 2 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
MECHANICAL SPECIFICATIONS
Optional Heat Sink (Part Number HS-CPLP2)
2.30
(58.4)
3.50
(88.9)
METAL BASEPLATE
2.00
(50.8)
0.75
(19.1)
0.20
(5.1)
0.545 (13.84) MAX.
0.525 (13.34) TYP.
PLASTIC SHELL
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.20 MIN
(5.1)
0.20
(5.1)
1.900
(48.3)
1.900
(48.3)
2.30
(58.4)
10
1
9
2
8
2.000 1.400
(50.80) (35.56)
1.000
(25.40)
1.600
1.300 (40.64)
1.000 (33.02)
(25.40)
7
3
0.400
(10.16)
6
4
(4) THREADED INSERTS
#M3 THD THRU
0.300
(7.62)
0.140 THRU AND COUNTERSINK
90° TO 0.26 (4 PLACES)
2.40
(61.0)
0.600
(15.24)
0.47
(11.9)
0.16
(4.1)
5
2.48
(63.0)
0.200
(5.08)
0.30
(7.62)
BOTTOM VIEW
0.20
(5.08)
Optional Heat Sink (Part Number HS-CP)
0.50 (12.70) TYP.
051 (12.95) MAX.
2.30
(58.4)
0.10
(2.5)
0.20
(5.1)
1.900
(48.3)
Pin
MATERIAL: BLACK ANODIZED ALUMINUM
INPUT/OUTPUT CONNECTIONS
Function
Pin
Function
1
-Input
6
5V Return
2
Case (Baseplate)
7
+5V Output
3
On/Off Control
8
3.3V Trim
4
+Input
9
3.3V Return
5
5V Trim
10
+3.3V Output
Standard pin length is shown. Please refer to the Part
Number Structure for special order pin lengths.
2.00
(50.8)
TOP VIEW
0.147 DIA. (3.734)
(4 PLACES)
0.20
(5.1)
2.40
(61.0)
MATERIAL: BLACK ANODIZED ALUMINUM
4 MOUNTING SCREWS AND 0.009 (0.229)
THICK THERMAL PAD INCLUDED
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
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MDC_BCP_75W.B06 Page 3 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage, balanced "full-load" conditions, unless noted.
Input
Input Voltage Range:
D24 Models
D48 Models
Dynamic Characteristics
18-36 Volts (24V nominal)
36-75 Volts (48V nominal)
Dynamic Load Response:
5V (50-100% load step to 1% VOUT)
3.3V (50-100% load step to 1% VOUT)
450μsec maximum
450μsec maximum
Overvoltage Shutdown:
D24 Models
D48 Models
37.5-40.5 Volts (39V typical)
78.8-87.0 Volts (83V typical)
Start-Up Time:
VIN to VOUT
On/Off to VOUT
30msec maximum
20msec maximum
Start-Up Threshold:
D24 Models
D48 Models
Switching Frequency
350kHz (±35kHz)
15.5-18 Volts (16.5V typical)
33.5-36 Volts (34.4V typical)
Undervoltage Shutdown:
D24 Models
D48 Models
Bellcore, ground fixed, controlled
1.49M hours (case @ 50°C)
1.72M hours (case @ 50°C)
Operating Temperature (Ambient):
Case to Ambient, No Heatsink
(See Derating Curves)
6.8°C/Watt
–40 to +85°C with derating
5.02 Amps maximum
2.51 Amps maximum
Case Temperature:
Maximum Allowable
For Thermal Shutdown
+100°C
+100°C minimum, +110°C maximum
17mA typical
Storage Temperature
–40 to +120°C
53mArms, 150mAp-p maximum
Dimensions
2.3"x2.4" x 0.525" (58.4x61x13.3mm)
Pi (0.47pF - 4.7μH - 3μF)
Case (Baseplate) Connection
Pin 2
Case Material
Diallyl phthalate, UL94V-0 rated
14-16 Volts (15.3V typical)
30.5-33.5 Volts (31.8V typical)
Input Current:
Normal Operating Conditions
Minimum Input Voltage:
D24 Models
D48 Models
Standby Mode:
Off, OV, UV, Thermal Shutdown
See Ordering Guide
Input Reflected Ripple Current:
Source Impedance <0.1
22μF Low-ESR Capacitor
Environmental
MTBF
D24 Models
D48 Models
Physical
Input Filter Type
Reverse-Polarity Protection:
D24 Models
D48 Models
1 minute duration, 6A maximum
1 minute duration, 4A maximum
On/Off Control: (Pin 3)
D24 & D48 Models
On = open or 2.0 - +VIN, IIN = 50μA max.
Off = 0-0.6V, IIN = 1mA max.
On = 0-0.6V, IIN = 1mA max.
Off = open or 2.0 - +VIN, IIN = 50μA max.
D24N & D48N" Models
Output
VOUT Accuracy
5V Output
3.3V Output
±2% maximum
±2% maximum
Minimum Loading Per Specification
No load
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide and Efficiency Curves
Trim Range
±10% independent
Isolation Voltage:
Input-to-Output
Input-to-Case
Output-to-Case
1500Vdc minimum
1000Vdc minimum
1000Vdc minimum
Isolation Capacitance
470pF
Baseplate
Aluminum
Pin Material
Gold plate over copper alloy
Weight
4.2 ounces (118 grams)
Primary to Secondary Insulation Level Basic
Models are specified at "full load" (5V & 3.3V @ 7.5A), with an external 22µF, low-ESR,
input capacitor and 10µF tantalum in parallel with 1µF ceramic output capacitors.
See Technical Notes for details.
Devices may be ordered with opposite polarity (pin 3 open = off). See Part Number
Suffixes and Technical Notes for additional information.
Output noise may be further reduced with the installation of additional external output
capacitors. See Technical Notes.
These signals must be referenced to the input return pin (–VIN).
Demonstrated MTBF available on request.
Absolute Maximum Ratings
Input Voltage:
Continuous:
D24 Models
D48 Models
Transient (100msec): D24 Models
D48 Models
Input Reverse-Polarity Protection
40.5 Volts
87 Volts
50 Volts
100 Volts
Input Current must be limited. 1 minute
duration. Fusing recommended.
6 Amps
4 Amps
Isolation Resistance
100M
Current Limit Inception:
5V @ 98% VOUT (3.3V no-load)
3.3V @ 98% VOUT (5V no-load)
16-20 Amps
16-20 Amps
Short Circuit Current:
Constant current 25A, indefinite
Output Overvoltage Protection
3.3V Outputs
5V Outputs
Temperature Coefficient
±0.02% per °C
Output Current
Overvoltage Protection:
5V Output
3.3V Output
Magnetic feedback, latching
6.8 volts
4.5Volts
Current limited. Devices can withstand
an indefinite output short circuit.
Storage Temperature
–40 to +120°C
Lead Temperature (Soldering, 10 sec.)
+300°C
D24 Models
D48 Models
3.8 Volts, latching
6.2 Volts, latching
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specifications Table is not implied, nor recommended.
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MDC_BCP_75W.B06 Page 4 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
TECHNICAL NOTES
5V & 3.3V Outputs/Returns
The BCP Series outputs (pins 7 & 10) and returns (pins 6 & 9) are isolated
from the +VIN and –VIN inputs (pins 4 & 1) via a transformer and opto-coupled
transistors.
The +5V Return (pin 6) and +3.3V Return (pin 9) are connected internal
to the DC/DC converter. Though the returns are common within the DC/DC
converter, the regulating control loop for each output is sensed directly at its
respective output and return pins. In order to maintain optimum regulation if
ground plane is not used, it is critical that PC board layouts also return each
output to its corresponding return pin.
Filtering and Noise Reduction
All BCP DC/DC Converters achieve their rated ripple and noise specifications
using the external input and output capacitors specified in the Performance/
Functional Specifications table. In critical applications, input/output noise may
be further reduced by installing additional external I/O caps. Input capacitors
should be selected for bulk capacitance, low ESR and high rms-ripple-current
ratings. Output capacitors should be selected for low ESR and appropriate
frequency response. All caps should have appropriate voltage ratings and be
mounted as close to the converters as possible.
The most effective combination of external I/O capacitors will be a function
of your particular load and layout conditions. Our Applications Engineers will
be pleased to recommend potential solutions and can discuss the possibility of
our modifying a device’s internal filtering to meet your specific requirements.
Contact our Applications Engineering Group for additional details.
Input Fusing
Certain applications and/or safety agencies may require the installation of fuses
at the inputs of power conversion components. Fuses should also be used if
the possibility of sustained, non-current-limited, input-voltage polarity reversals
exists. For BCP DC/DC Converters, you should use fast-blow type fuses with
values no greater than the following.
Fuse Value
VIN Range
"D24" Models
6 Amps
"D48" Models
4 Amps
Fuses should be installed in the +Input line.
Input Overvoltage/Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate until the
ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for
"D48" models). Once operating, devices will not turn off until the input voltage
drops below the Undervoltage Shutdown limit (32V for "D48" models). Subsequent re-start will not occur until the input is brought back up to the Start-Up
Threshold. This built-in hysteresis prevents any unstable on/off situations from
occurring at a single voltage.
Input voltages exceeding the input overvoltage shutdown specification
listed in the Performance/Functional Specifications will cause the device to
shutdown. A built-in hysteresis (2V typical for "D24" models, 4V typical for
"D48" models) will not allow the converter to restart until the input voltage is
sufficiently reduced.
Start-Up Time
The VIN to VOUT start-up time is the interval between the time at which a ramping input voltage crosses the turn-on threshold point and the fully-loaded
output voltage enters and remains within its specified accuracy band. Actual
measured times will vary with input source impedance, external input capacitance, and the slew rate and final value of the input voltage as it appears to the
converter.
The On/Off to VOUT start-up time assumes the converter has its nominal
input voltage applied but is turned off via the On/Off Control. The specification
defines the interval between the time at which the converter is turned on and
the fully loaded output voltage enters and remains within its specified accuracy
band.
On/Off Control (Standard feature)
The On/Off Control (pin 3) may be used for remote on/off operation. As shown
in Figure 1A, the control pin is referenced to the –Input (pin 1) and will be
pulled to a high state internally. The standard BCP converter (no suffix) is
designed so that it is enabled when the control pin is left open and disabled
when the control pin is pulled low (to less than +0.6V relative to –Input).
Dynamic control of the on/off function is best accomplished with a mechanical relay or an open-collector/open-drain drive circuit (optically isolated if
appropriate). The drive circuit should be able to sink approximately 1mA for
logic low.
The on/off control function is designed such that the converter can be
disabled (pin 3 pulled low for no-suffix models) while input power is ramping
up and then "released" once the input has stabilized.
For BCP converters configured with the negative-polarity option on the
On/Off Control pin ("N" suffix added to part number), operation is opposite to
that described above. The converter is disabled when the On/Off Control pin is
left open and enabled when pulled low.
4
3.3V
+INPUT
4
+INPUT
100k
21k
3
3
ON/OFF
CONTROL
ON/OFF
CONTROL
1
1
–INPUT
Figure 1A. No Suffix
–INPUT
Figure 1B. "N" Suffix
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MDC_BCP_75W.B06 Page 5 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
Output Overvoltage Protection
Each voltage output of the BCP Series converter is independently monitored via an auxiliary winding in the output inductor. If the output voltage
should rise to a level which could be damaging to the load circuitry (see
Performance/Functional Specifications for limits), the overvoltage circuitry
will power down the PWM controller and latch off the DC/DC converter. The
device must now be restarted by powering cycling VIN.
Current Limiting
When output current demands exceed the maximum output current rating
by 107% to 133%, the DC/DC converter will go into a current limiting
mode. In this condition the output voltage decreases proportionately as the
output current increases, thereby maintaining a somewhat constant power
dissipation—referred to as Power Limiting (see Figure 2). As the load
approaches a short circuit, the output current will continue to increase until
it reaches the rated Short Circuit Current limit.
Heat Sinks for BCP Series
MPS offers two standard heat sinks that can be mounted to the half-brick
package to extend the converter's operating temperature range. Along with the
standard 2.3" x 2.4" x 0.5" (HS-CP) heat sink, DATEL has designed a low-profile
heat sink for height-restricted applications. This new heat sink (HS-CPLP2) is
designed with radiant fins that extend 0.51" beyond either side of the 2.4"
dimension of the BCP package. The convenience of this design is that the finned
extensions protrude only 0.31" below the top surface of the DC/DC converter,
allowing components with a profile height less than 0.215" to be mounted on
the pc board below the heat sink. Therefore, while the surface area of the lowprofile heat sink measures 2.3" x 3.5", pcb real estate is unaffected.
For optimum thermal performance in a natural convection application, the
low-profile heat sink should be mounted with the fins vertically oriented. Both
models are shipped with 0.009" sellf-adhesive thermal pad and mounting
screws.
BCP-5/15-3.3/15-D24, D48 Current Limiting Characteristics
(Nominal VIN)
6.00
5.00
5V Output
6
3.00
5
˚C
WATT
4.00
4
2.00
3.3V Output
1.00
26
25
24
23.5
22.6
22.4
21.9
20.9
20.3
19.8
19.3
18.8
18.3
17.8
17.2
16.7
16.2
15.7
15.2
0
Output Current, IOUT (Amps)
Figure 2. Current Limiting Characteristics
Short Circuit Condition
As described under "Current Limiting," when the BCP Series DC/DC converter
output is subjected to a short circuit condition, the output current will remain at
the Short Circuit Current limit. In this state there is negligible power dissipated
in the load. Therefore, most of the input power is dissipated within the converter, causing the internal temperature to increase. If this condition persists,
Thermal Shutdown will activate and shutdown the DC/DC converter. When the
internal temperature is sufficiently decreased, the converter will self-start.
THERMAL RESISTANCE
Output Voltage VOUT (Volts)
Input Reverse-Polarity Protection
Upon applying a reverse-polarity voltage to the DC/DC converter, an internal
diode will be forward biased and draw excessive current from the power
source. Therefore, it is required that the input current be limited be either an
appropriately rated input fuse or a current limited power source.
HS-CPLP2
3
HS-CP
2
1
0
0
100
200
300
400
500
600
700
AIR VELOCITY (FT./MIN.)
HS-CP and HS-CPLP2 Heat Sink Performance Vs. Air Flow
(@ 10.5 Watts Power Dissipation)
Thermal Shutdown
The BCP Series is equipped with Thermal Shutdown circuitry. If the internal
temperature of the DC/DC converter rises above the designed operating temperature, a precision temperature sensor will power down the unit. When the
internal temperature decreases below the threshold of the temperature sensor
the unit will self-start.
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MDC_BCP_75W.B06 Page 6 of 14
BCP Models
Output Trimming
Both the 5V and 3.3V outputs of the BCP Series can be independently trimmed
via a trimpot (Figure 3A) or a single fixed resistor as shown (Figures 3B & 3C).
The trimpot can be used to determine the value of a single fixed resistor. A
single fixed resistor can increase or decrease the output voltage depending on
its connection. Fixed resistors should be metal-film types with absolute TCR’s
less than 100ppm/°C to ensure stability.
+3.3V OUTPUT
3.3V TRIM
1
20kΩ
5-22
TURNS
8
+5V OUTPUT
+INPUT
5V TRIM
5V RETURN
+3.3V
LOAD
Table 1 shows the typical fixed Trim Resistor values for output voltage
changes of 0 through 10%. Trim adjustment greater than 10% can have an
adverse affect on the converter’s performance and is not recommended.
3.3V
Trim Down
3.3V
Trim Up
5V
Trim Down
5V
Trim Up
0%
–
–
–
–
1%
47.81k
27.93k
189.75k
61.68k
2%
22.32k
12.78k
91.06k
28.34k
3%
13.82k
7.73k
58.17k
17.23k
4%
9.57k
5.21k
41.72k
11.68k
9
5%
7.02k
3.69k
31.85k
8.34k
7
6%
5.320k
2.68k
25.27k
6.12k
7%
4.10k
1.96k
20.57k
4.53k
8%
3.19k
1.42k
17.05k
3.34k
9%
2.48k
1.00k
14.31k
2.42k
10%
1.92k
0.66k
12.12k
1.68k
–INPUT
3.3V RETURN
4
10
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
20kΩ
5-22
TURNS
5
+5V
LOAD
6
Table 1. Percentage of Output Voltage Change vs Trim Resistor Value (Ohms)
Figure 3A. Trim Connections Using a Trimpot
A resistor connected from the Trim Pin (pin 5 for 5V trim, pin 8 for 3.3V trim)
to the appropriate Return (pin 6 for 5V trim, pin 9 for 3.3V trim) will increase
the output voltage.
The following equations mathematically depict:
Output Voltage for a given Trim Resistor
Trim Resistor for a given Output Voltage
5 Volt Trim Up
+3.3V OUTPUT
3.3V TRIM
1
+5V OUTPUT
+INPUT
5V TRIM
5V RETURN
1
0.30RTUP (kW) + 1.5
VO = 5.0 +
8
–INPUT
3.3V RETURN
4
10
9
+3.3V
TRIM
UP
+3.3V
LOAD
VO = 1.25
0.38 +
1
+5V
LOAD
VO = 3.30 +
VO = 1.23
1.23 +
1
RT UP(kW) + 2.37
+INPUT
9
+3.3V
TRIM
DOWN
5V TRIM
5
5V RETURN
+3.3V
LOAD
RTUP (k7) =
7
6
+5V
TRIM
DOWN
+5V
LOAD
Figure 3C. Decrease Output Voltage Trim Connections Using a Fixed Resistor
+1
RT DOWN(kW) =
RT DOWN(kW)+ 2.37
(5.76 – V O) x 3.3
VO – 5
3.3 Volt Trim Up
8
+5V OUTPUT
RT UP(kW) =
1
VO – 3.3
–2.37
1
1
5 Volt Trim Up
10
3.3V TRIM
4
–0.38
(0.8VO) – 1
2.07
VO –1
1.23
–1.23
–2.37
For Model BCP-5/15-3.3/15-D48-T only (special order only)
RTUP (k7) =
3.3V RETURN
–4.99
1.14
3.3 Volt Trim Down
A single resistor connected from the Trim Pin (pin 5 for 5V trim, pin 8 for
3.3V trim) to its appropriate +Output (pin 7 for 5V trim, pin 10 for 3.3V trim) will
decrease the output voltage.
–INPUT
1
RT DOWN(kW) =
3.3 Volt Trim Up
+5V
TRIM
UP
2.07
1
+1
RT DOWN(kW) + 4.99
5
Figure 3B. Increase Output Voltage Trim Connections Using a Fixed Resistor
+3.3V OUTPUT
–4.99
5 Volt Trim Down
1.14
7
6
1
(0.3VO) – 1.50
RTUP(kW) =
(5.825 – VO) x 0.33
VO – 3.3
5 Volt Trim Down
RTDOWN (k7) =
(VO – 4.42) x 4.3
5 – VO
3.3 Volt Trim Down
RTDOWN (k7) =
(VO – 2.89) x 0.66
3.3 – VO
Note: Resistor values are in k. Accuracy of adjustment is subject to
tolerances of resistor values and factory-adjusted output accuracy.
VO = desired output voltage.
Case Connection
BCP DC/DC's do not have their metal baseplate connected to one of the input
pins. The "uncommitted" baseplate is connected to pin 2 which, depending
upon your system configuration, should be connected to either +Input (pin 4),
–Input (pin 1), Output Returns (pins 6 & 9), or earth ground.
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MDC_BCP_75W.B06 Page 7 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
D24 Model
Typical Performance Curves
D48 Model
Output Ripple and Noise (PARD)
(VIN = 48V, [email protected], 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
Output Ripple and Noise (PARD)
(VIN = 24V, [email protected], 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
3.3V Output
Ripple/Noise
20mV/div
3.3V Output
Ripple/Noise
20mV/div
5V Output
Ripple/Noise
20mV/div
5V Output
Ripple/Noise
20mV/div
1µsec/div
1µsec/div
5V Output Full-Load to Half-Load Transient Response
5V Output Full-Load to Half-Load Transient Response
(VIN = 48V, 3.3V@ 0A, external 10µF || 1µF output capacitors.)
(VIN = 24V, 3.3V@ 0A, external 10µF || 1µF output capacitors.)
5V Output
100mV/div
5V Output
100mV/div
15A
15A
Output
Current
5A/div
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
5V Output Half-Load to Full-Load Transient Response
5V Output Half-Load to Full-Load Transient Response
(VIN = 48V, 3.3V@ 0A, external 10µF || 1µF output capacitors.)
(VIN = 24V, 3.3V@ 0A, external 10µF || 1µF output capacitors.)
5V Output
100mV/div
5V Output
100mV/div
15A
15A
Output
Current
5A/div
Output
Current
5A/div
7.5A
100µsec/div
7.5A
100µsec/div
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MDC_BCP_75W.B06 Page 8 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
Typical Performance Curves
"Half-Brick" 75 W DC/DC Converters
D24 Model
D48 Model
3.3V Output Full-Load to Half-Load Transient Response
3.3V Output Full-Load to Half-Load Transient Response
(VIN = 24V, 5V@ 0A, external 10µF || 1µF output capacitors.)
(VIN = 48V, 5V@ 0A, external 10µF || 1µF output capacitors.)
3.3V Output
100mV/div
3.3V Output
100mV/div
15A
Output
Current
5A/div
15A
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
3.3V Output Half-Load to Full-Load Transient Response
3.3V Output Half-Load to Full-Load Transient Response
(VIN = 24V, 5V@ 0A, external 10µF || 1µF output capacitors.)
(VIN = 48V, 5V@ 0A, external 10µF || 1µF output capacitors.)
3.3V Output
200mV/div
3.3V Output
200mV/div
15A
15A
Output
Current
5A/div
Output
Current
5A/div
7.5A
7.5A
100µsec/div
100µsec/div
Input Ripple Current
Input Ripple Current
(VIN = 24V, 5V @ 15A, 3.3V@ 0A, external 22µF low-ESR input capacitor.)
(VIN = 48V, 5V @ 15A, 3.3V@ 0A, external 22µF low-ESR input capacitor.)
50mA/div
50mA/div
1µsec/div
1µsec/div
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MDC_BCP_75W.B06 Page 9 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
Typical Performance Curves
"Half-Brick" 75 W DC/DC Converters
D24 Model
D48 Model
Input Ripple Current
Input Ripple Current
(VIN = 24V, 5V @ 0A, 3.3V @ 15A, external 22µF low-ESR input capacitor.)
(VIN = 48V, 5V @ 0A, 3.3V @ 15A, external 22µF low-ESR input capacitor.)
50mA/div
50mA/div
1µsec/div
1µsec/div
Start-Up from Remote On/Off Control
Start-Up from Remote On/Off Control
(VIN = 24V, 5V@ 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
(VIN = 48V, 5V@ 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
Remote
On/Off
(Pin 3)
2V/div
Remote
On/Off
(Pin 3)
2V/div
3.3V
Output
2V/div
3.3V
Output
2V/div
5V
Output
2V/div
5V
Output
2V/div
4msec/div
4msec/div
Start-Up from VIN
Start-Up from VIN
(VIN = 24V, 5V@ 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
VIN
10V/div
(VIN = 48V, 5V@ 7.5A, 3.3V @ 7.5A, external 10µF || 1µF output capacitors.)
VIN
20V/div
3.3V
Output
2V/div
3.3V
Output
2V/div
5V
Output
2V/div
5V
Output
2V/div
4msec/div
4msec/div
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MDC_BCP_75W.B06 Page 10 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
Typical Performance Curves
D24 Model
D48 Model
Output Power vs. Ambient Temperature
(Without heat sink, 5V Output, 3.3V @ 0A.)
80
80
70
70
60
60
Output Power (Watts)
Output Power (Watts)
Output Power vs. Ambient Temperature
(Without heat sink, 5V Output, 3.3V @ 0A.)
50
40
Natural Convection Cooling
30
150 Linear Feet Per Minute
20
50
40
Natural Convection Cooling
30
150 Linear Feet Per Minute
20
300 Linear Feet Per Minute
10
300 Linear Feet Per Minute
10
0
–40
–10
0
10
20
30
40
50
60
70
80
90
0
–40
100
–10
0
10
Ambient Temperature (°C)
70
70
60
60
Output Power (Watts)
Output Power (Watts)
80
50
40
Natural Convection Cooling
150 Linear Feet Per Minute
50
60
70
80
90
100
50
40
Natural Convection Cooling
30
150 Linear Feet Per Minute
20
300 Linear Feet Per Minute
300 Linear Feet Per Minute
10
10
0
–40
0
35
40
45
50
55
60
65
70
75
80
85
90
95
0
–40
100
0
35
40
45
Output Power vs. Ambient Temperature
(Without heat sink, 3.3V Output, 5V @ 0A.)
55
60
65
70
75
80
85
90
95
100
Output Power vs. Ambient Temperature
(Without heat sink, 3.3V Output, 5V @ 0A.)
50
Output Power (Watts)
50
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
0
–40
50
Ambient Temperature (°C)
Ambient Temperature (°C)
Output Power (Watts)
40
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 5V Output, 3.3V @ 0A.)
80
20
30
Ambient Temperature (°C)
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 5V Output, 3.3V @ 0A.)
30
20
300 Linear Feet Per Minute
–10
0
10
20
30
40
50
60
Ambient Temperature (°C)
70
80
90
100
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
0
–40
300 Linear Feet Per Minute
–10
0
10
20
30
40
50
60
70
80
90
100
Ambient Temperature (°C)
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MDC_BCP_75W.B06 Page 11 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
Typical Performance Curves
D24 Model
D48 Model
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 3.3V Output, 5V @ 0A.)
Output Power vs. Ambient Temperature
(With HS-CP heat sink, 3.3V Output, 5V @ 0A.)
50
Output Power (Watts)
Output Power (Watts)
50
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
300 Linear Feet Per Minute
0
–40
0
35
40
45
50
55
60
65
70
75
80
85
90
95
40
30
Natural Convection Cooling
20
150 Linear Feet Per Minute
10
300 Linear Feet Per Minute
0
–40
100
0
35
40
45
50
Ambient Temperature (°C)
60
65
90
88
88
86
86
84
84
VIN = 30V
Efficiency (%)
VIN = 24V
80
VIN = 18V
78
75
80
85
90
95
100
5V Efficiency vs. Load
(+3.3V Output @ 0 Amps)
90
82
70
Ambient Temperature (°C)
5V Efficiency vs. Load
(+3.3V Output @ 0 Amps.)
Efficiency (%)
55
76
74
VIN = 75V
VIN = 60V
82
80
VIN = 48V
78
76
74
72
VIN = 36V
72
VIN = 36V
70
70
68
1.875
3.75
5.625
7.5
9.375
11.25
13.125
68
1.875
15
3.75
+5V Output Current (Amps)
5.625
7.5
9.375
11.25
13.125
15
13.125
15
+5V Output Current (Amps)
3.3V Efficiency vs. Load
(+5V Output @ 0 Amps.)
3.3V Efficiency vs. Load
(+5V Output @ 0 Amps.)
75.0
78
72.5
76
74
70.0
72
VIN = 18V
Efficiency (%)
Efficiency (%)
67.5
65.0
VIN = 24V
62.5
60.0
VIN = 30V
57.5
70
VIN = 60V
68
VIN = 48V
66
64
VIN = 36V
62
60
55.0
58
VIN = 36V
52.5
50.0
1.875
VIN = 75V
56
3.75
5.625
7.5
9.375
11.25
+3.3V Output Current (Amps)
13.125
15
54
1.875
3.75
5.625
7.5
9.375
11.25
+3.3V Output Current (Amps)
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MDC_BCP_75W.B06 Page 12 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
Typical Performance Curves
D24 Model
D48 Model
Overall Efficiency vs. Line and Load
90
90
88
88
86
86
84
84
Efficiency (%)
Efficiency (%)
Overall Efficiency vs. Line and Load
82
+3.3V @ 0A and +5V @15A
+3.3V @ 3.75A and +5V @11.25A
+3.3V @ 7.5A and +5V @7.5A
+3.3V @ 15A and +5V @0A
80
78
82
78
76
76
74
74
72
72
70
+3.3V @ 0A and +5V @15A
+3.3V @ 3.75A and +5V @11.25A
+3.3V @ 7.5A and +5V @7.5A
+3.3V @ 15A and +5V @0A
80
70
36
40.4
44.7
49
53.3
57.7
62
66.3
70.7
75
36
40.4
Input Voltage (Volts)
44.7
49
53.3
57.7
62
66.3
70.7
75
Input Voltage (Volts)
Output Ripple and Noise (PARD) vs. Input Voltage
(One output @ 15A, other output @ 0A,
PARD measured on loaded output, 20MHz bandwidth.)
Output Ripple and Noise (PARD) vs. Input Voltage
(One output @ 15A, other output @ 0A,
PARD measured on loaded output, 20MHz bandwidth.)
70
60
Output PARD Voltage (mVp-p)
Output PARD Voltage (mVp-p)
55
60
PARD 3.3V Output
50
PARD 5V Output
40
Ripple 3.3V Output
30
Ripple 5V Output
20
PARD 3.3V Output
50
45
40
35
PARD 5V Output
Ripple 3.3V Output
30
25
20
15
10
18
20.57
23.14
25.71
28.29
Input Voltage (Volts)
30.86
33.43
36
Ripple 5V Output
10
35
40.71
46.43
52.14
57.86
63.57
69.29
75
Input Voltage (Volts)
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MDC_BCP_75W.B06 Page 13 of 14
BCP Models
Dual Output, Mixed Voltage, Isolated 5V & 3.3 V,
"Half-Brick" 75 W DC/DC Converters
Options and Adaptations
Optional Functions
The BCP 75W DC/DC Dual Half-Bricks offer various electrical and mechanical options. Per the Ordering Guide on page 2, the trailing input voltage range
(D24 or D48) in each part number pertains to the base part number. Partnumber suffixes are added after the "input range," indicating the selection of
standard options. The resulting part number is a "standard product" and is
available to any customer desiring that particular combination of options, as
described below.
Suffix
Description
Blank
On/Off Control function with positive polarity on pin 3 and independent trim function on either output (5V trim on pin 5 and 3.3V trim on
pin 8). The pin length remains at 0.2 inches (5.08 mm).
N
On/Off Control function with negative polarity on pin 3.
L1
Trim the pin length to 0.110 ±0.010 inches (2.79 ±0.25mm). This
option requires a 100-piece minimum order quantity.
L2
Trim the pin length to 0.145 ±0.010 inches (3.68 ±0.25mm). This
option requires a 100-piece minimum order quantity.
-Y
-H
RoHS-5 hazardous substance compliance with lead exception
Conformal Coating (special order):
Blank = no coating, standard
H = coating added, special order
-T
Special trim versions (quantity order only)
-C
RoHS-6 hazardous substance full compliance, no lead.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
Adaptations
There are various additional configurations available on BCP 75W DC/DC Dual
Half-Bricks. Because designating each with a standard part-number suffix is not
always feasable, MPS assigns a 5-digit "adaptation code" after the part-number
suffixes. Once a configuration has been requested by a customer and created
by MPS, the resulting product is available to any customer as a "standard"
off-the-shelf product. Contact MPS directly if you are interested in your own
set of options/adaptations. Our policy for minimum order quantities may apply.
Consequently, the following products are offered for sale:
BCP-5/15-3.3/15-D48-30752
BCP-5/15-3.3/15-D48-30752-Y (RoHS-5)
Standard product, 48VIN, 5V/15A and 3.3V/15A Outputs with positive On/Off
logic and modified VOUT Trim functions (pin 5 and 8 positions) to be compatible
with Power-One's HBD-series. Adapted low profile packaging of 0.5 inches
(12.7 mm) and with trimmed pin length to 0.15 inches (3.8 mm).
RoHS-5 compliance refers to the exclusion of the six hazardous substances
in the RoHS specification with the excepion of lead. MPS' RoHS-5 products use
all the conforming RoHS materials, however our solders are reduced lead.
BCP-5/15-3.3/15-D48-T special trim version (quantity order only).
BCP-5/15-3.3/15-D48THL2-Y
Positive On/Off polarity, special trim, conformal coating added, 3.68mm pin
length and RoHS-5 hazardous substance compliance (with lead).
06/02/08
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/
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. Specifications are subject to change without
notice.
© 2012 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_BCP_75W.B06 Page 14 of 14