PXB15-xxWDxx
Dual Output 15 Watt DC/DC Converters
(with wide range input)
The PXB15 series is approved to UL/CSA/EN/IEC 60950-1.
Table of contents
Absolute Maximum Rating
Output Specification
Input Specification
General Specification
Characteristic Curves
Testing Configurations
EMC Consideration
Input Source Impedance
Output Over Current Protection
Output Over Voltage Protection
Short Circuit Protection
P2
P2
P3
P4
P5
P17
P18
P20
P20
P20
P21
Thermal Consideration
Heat Sink Consideration
Remote ON/OFF Control
Mechanical Data
Recommended Pad Layout
Soldering Considerations
Packaging Information
Part Number Structure
Safety and Installation Instruction
MTBF and Reliability
P21
P21
P22
P23
P24
P25
P25
P26
P26
P26
Data Sheet
Jul. 20, 2010
15W, Dual Output
Absolute Maximum Rating
Parameter
Model
Input Voltage
Continuous
Transient (100mS)
Input Voltage Variation
(complies with ETS300 132 part 4.4)
Operating Ambient Temperature (with derating)
Operating Case Temperature
Storage Temperature
Min
Max
Unit
24WDXX
48WDXX
24WDXX
48WDXX
36
75
50
100
All
5
V/mS
85
105
125
ºC
ºC
ºC
All
-40
All
-55
VDC
Output Specification
Parameter
Output Voltage
(Vin = Vin(nom) ; Full Load ; TA=25 ºC)
Model
Min
Typ
Max
XXWD05
4.95
5
5.05
XXWD12
11.88
12
12.12
XXWD15
14.85
15
15.15
Unit
VDC
Output Regulation
Line (Vin(min) to Vin(max) at Full Load)
All
Load (0% to 100% of Full Load)
Cross Regulation
Asymmetrical Load 25% / 100% of Full Load
All
-0.5
+0.5
-1.0
+1.0
-5
5
%
%
Output Ripple & Noise(See Page 17)
Peak-to-Peak (20MHz bandwidth)
All
100
mVP-P
(Measured with a 1uF M/C and a 10uF T/C )
Temperature Coefficient
Output Voltage Overshoot
(Vin(min) to Vin(max) ; Full Load ; TA=25 ºC)
All
-0.02
+0.02
%/ ºC
3
% VOUT
All
0
All
300
mV
All
250
μS
Dynamic Load Response
(Vin = Vin(nom) ; TA=25 ºC)
Load step change from
75% to 100% or 100 to 75% of Full Load
Peak Deviation
Settling Time (VOUT＜10% peak deviation)
Output Current
Output Over Voltage Protection
(Voltage Clamped)
XXWD05
0
±1500
XXWD12
0
±625
XXWD15
0
±500
XXWD05
5.6
7.0
XXWD12
13.5
19.6
XXWD15
16.8
20.5
Output Over Current Protection
All
Output Short Circuit Protection
All
150
mA
VDC
% FL.
Hiccup, automatic recovery
PXB15-xxWDxx
2
Data Sheet
Jul. 20, 2010
15W, Dual Output
Input Specification
Parameter
Operating Input Voltage
Input Current
(Maximum value at Vin = Vin(nom); Full Load)
Model
Min
Typ
Max
24WDXX
9
24
36
48WDXX
18
48
75
24WD05
772
24WD12
753
24WD15
744
48WD05
386
48WD12
382
48WD15
Input Standby Current
(Typical value at Vin = Vin(nom) ; No Load)
Under Voltage Lockout Turn-on Threshold
Under Voltage Lockout Turn-off Threshold
Input Reflected Ripple Current (See Page 17)
(5 to 20MHz, 12μH source impedance)
Unit
VDC
mA
377
24WD05
20
24WD12
25
24WD15
25
48WD05
15
48WD12
15
48WD15
20
mA
24WDXX
9
48WDXX
18
24WDXX
8
48WDXX
16
All
VDC
VDC
30
mAP-P
Start Up Time
(Vin = Vin(nom) and constant resistive load)
Power up
All
30
Remote ON/OFF
mS
30
Remote ON/OFF Control (See Page 22)
(The ON/OFF pin voltage is referenced to -VIN)
Negative Logic DC-DC ON(Short)
DC-DC OFF(Open)
Positive Logic
All
DC-DC ON(Open)
DC-DC OFF(Short)
0
1.2
3
15
3
15
0
Remote Off Input Current
All
Input Current of Remote Control Pin
All
1.2
2.5
-0.5
VDC
mA
1.0
mA
PXB15-xxWDxx
3
Data Sheet
Jul. 20, 2010
15W, Dual Output
General Specification
Parameter
Efficiency(See Page 17)
(Vin = Vin(nom) ; Full Load ; TA=25 ºC)
Model
Min
Typ
24WD05
85
24WD12
87
24WD15
88
48WD05
85
48WD12
86
48WD15
87
Max
Unit
%
Isolation Voltage
Input to Output
All
Input (Output) to Case
VDC
1600
1000
Isolation Resistance
All
Isolation Capacitance
All
1
GΩ
Switching Frequency
All
400
KHz
Weight
All
15
g
All
1.330×10
1000
pF
MTBF(See Page 26)
Bellcore TR-NWT-000332, TC=40 ºC
MIL-HDBK-217F
6
hours
5
5.630×10
PXB15-xxWDxx
4
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves
All test conditions are at 25 ºC. PXB15-24WD05
Efficiency versus Output Current
Typical Output Ripple and Noise.
Vin = Vin(nom) ; Full Load
Efficiency versus Input Voltage. Full Load
Transient Response to Dynamic Load Change from
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Derating OutputCurrentversus AmbientTemperature andAirflow
Typical Input Start-Up and Output Rise Characteristic
Vin = Vin(nom)
Vin = Vin(nom) ; Full Load
PXB15-xxWDxx
5
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24WD05
Conduction Emission of EN55022 Class A
Using ON/OFF Voltage Start-Up and Vo Rise Characteristic
Vin = Vin(nom) ; Full Load
Vin = Vin(nom) ; Full Load
Conduction Emission of EN55022 Class B
Power Dissipation versus Output Current
Vin = Vin(nom); Full Load
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
PXB15-xxWDxx
6
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24WD12
Efficiency versus Output Current
Typical Output Ripple and Noise.
Vin = Vin(nom) ; Full Load
Efficiency versus Input Voltage. Full Load
Transient Response to Dynamic Load Change from
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Derating OutputCurrentversus AmbientTemperature andAirflow
Typical Input Start-Up and Output Rise Characteristic
Vin = Vin(nom)
Vin = Vin(nom) ; Full Load
PXB15-xxWDxx
7
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24WD12
Conduction Emission of EN55022 Class A
Using ON/OFF Voltage Start-Up and Vo Rise Characteristic
Vin = Vin(nom) ; Full Load
Vin = Vin(nom) ; Full Load
Conduction Emission of EN55022 Class B
Power Dissipation versus Output Current
Vin = Vin(nom) ; Full Load
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
PXB15-xxWDxx
8
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24WD15
Efficiency versus Output Current
Typical Output Ripple and Noise.
Vin = Vin(nom) ; Full Load
Efficiency versus Input Voltage. Full Load
Transient Response to Dynamic Load Change from
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Derating OutputCurrentversus AmbientTemperature andAirflow
Typical Input Start-Up and Output Rise Characteristic
Vin = Vin(nom)
Vin = Vin(nom) ; Full Load
PXB15-xxWDxx
9
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24WD15
Conduction Emission of EN55022 Class A
Using ON/OFF Voltage Start-Up and Vo Rise Characteristic
Vin = Vin(nom) ; Full Load
Vin = Vin(nom) ; Full Load
Conduction Emission of EN55022 Class B
Power Dissipation versus Output Current
Vin = Vin(nom) ; Full Load
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
PXB15-xxWDxx
10
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48WD05
Efficiency versus Output Current
Typical Output Ripple and Noise.
Vin = Vin(nom); Full Load
Efficiency versus Input Voltage. Full Load
Transient Response to Dynamic Load Change from
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Derating OutputCurrentversus AmbientTemperature and Airflow
Typical Input Start-Up and Output Rise Characteristic
Vin = Vin(nom)
Vin = Vin(nom) ; Full Load
PXB15-xxWDxx
11
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48WD05
Conduction Emission of EN55022 Class A
Using ON/OFF Voltage Start-Up and Vo Rise Characteristic
Vin = Vin(nom) ; Full Load
Vin = Vin(nom) ; Full Load
Conduction Emission of EN55022 Class B
Power Dissipation versus Output Current
Vin = Vin(nom) ; Full Load
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
PXB15-xxWDxx
12
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48WD12
Efficiency versus Output Current
Typical Output Ripple and Noise.
Vin = Vin(nom) ; Full Load
Efficiency versus Input Voltage. Full Load
Transient Response to Dynamic Load Change from
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Derating OutputCurrentversus AmbientTemperature andAirflow
Typical Input Start-Up and Output Rise Characteristic
Vin = Vin(nom)
Vin = Vin(nom) ; Full Load
PXB15-xxWDxx
13
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48WD12
Conduction Emission of EN55022 Class A
Using ON/OFF Voltage Start-Up and Vo Rise Characteristic
Vin = Vin(nom) ; Full Load
Vin = Vin(nom) ; Full Load
Conduction Emission of EN55022 Class B
Power Dissipation versus Output Current
Vin = Vin(nom) ; Full Load
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
PXB15-xxWDxx
14
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48WD15
Efficiency versus Output Current
Typical Output Ripple and Noise.
Vin = Vin(nom) ; Full Load
Efficiency versus Input Voltage. Full Load
Transient Response to Dynamic Load Change from
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Derating OutputCurrentversus AmbientTemperature andAirflow
Typical Input Start-Up and Output Rise Characteristic
Vin = Vin(nom)
Vin = Vin(nom) ; Full Load
PXB15-xxWDxx
15
Data Sheet
Jul. 20, 2010
15W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48WD15
Conduction Emission of EN55022 Class A
Using ON/OFF Voltage Start-Up and Vo Rise Characteristic
Vin = Vin(nom) ; Full Load
Vin = Vin(nom) ; Full Load
Conduction Emission of EN55022 Class B
Power Dissipation versus Output Current
Vin = Vin(nom) ; Full Load
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
PXB15-xxWDxx
16
Data Sheet
Jul. 20, 2010
15W, Dual Output
Testing Configurations
Input reflected-ripple current measurement
CURRENT PROBEMEASURE POINT
+Vin
L
+
BATTERY
C1
+
C2
-Vin
Component
L
C1
C2
Value
12μH
10μF
10μF
Voltage
---100V
100V
Reference
---Aluminum Electrolytic Capacitor
Aluminum Electrolytic Capacitor
Peak-to-peak output ripple & noise measurement
Output voltage and efficiency measurement
Note: All measurements are taken at the module terminals.
V Io
Efficiency o
Vin I in
100%
PXB15-xxWDxx
17
Data Sheet
Jul. 20, 2010
15W, Dual Output
EMC considerations
Suggested schematic for EN55022 conducted emission Class A limits
Recommended layout with input filter
To meet conducted emissions EN55022 CLASS A, the following components are needed:
Component
C1
C2
C3,C4
Value
6.8uF
6.8uF
470pF
Voltage
50V
50V
3KV
Component
C1
C2
C3,C4
Value
2.2uF
2.2uF
470pF
Voltage
100V
100V
3KV
PXB15-24WDXX
Reference
1812 MLCC
1812 MLCC
1808 MLCC
PXB15-48WDXX
Reference
1812 MLCC
1812 MLCC
1808 MLCC
PXB15-xxWDxx
18
Data Sheet
Jul. 20, 2010
15W, Dual Output
EMC considerations (Continued)
C5
L1
－ INPUT
+Vin
C1
C2
+Vout
Load
C3
COM
Load
-Vin
－ INPUT
-Vout
D/D Converter
C4
Suggested schematic for EN55022 conducted emission Class B limits
Recommended layout with input filter
To meet conducted emissions EN55022 CLASS B, the following components are needed:
PXB15-24WDXX
Component
Value
C1,C3
6.8μF
C2
---C4,C5
470pF
L1
325μH
PXB15-48WDXX
Component
Value
C1,C3
2.2μF
C2
2.2μF
C4,C5
1000pF
L1
325μH
Voltage
50V
---3KV
----
Reference
1812 MLCC
---1808 MLCC
Common Choke
Voltage
100V
100V
3KV
----
Reference
1812 MLCC
1812 MLCC
1808 MLCC
Common Choke
PXB15-xxWDxx
19
Data Sheet
Jul. 20, 2010
15W, Dual Output
Input Source Impedance
The power module should be connected to a low impedance input source. Highly inductive source impedance can
affect the stability of the power module. The addition of an external C-L-C filter is recommended to minimize input
reflected ripple current. The inductor is simulated source impedance of 12μH and capacitor is Nippon chemi-con KZE
series 10μF/100V&10μF/100V. The capacitor must be located as close as possible to the input terminals of the power
module for lower impedance.
Output Over Current Protection
When excessive output currents occur in the system, circuit protection is required on all power supplies. Normally,
overload current is maintained at approximately 150 percent of rated current for PXB15W Dual output series.
Hiccup-mode is a method of operation in a power supply whose purpose is to protect the power supply from being
damaged during an over-current fault condition. It also allows the power supply to restart when the fault is removed.
One of the problems resulting from over current is that excessive heat may be generated in power devices; especially
MOSFET and Schottky diodes and the temperature of those devices may exceed their specified limits. A protection
mechanism has to be used to prevent those power devices from being damaged.
Output Over Voltage Protection
The output over-voltage protection consists of a Zener diode that monitors the output voltage on the feedback loop. If
the voltage on the output terminals exceeds the over-voltage protection threshold, then the Zener diode will send a
signal to the control IC to limit the output voltage.
PXB15-xxWDxx
20
Data Sheet
Jul. 20, 2010
15W, Dual Output
Short Circuit Protection
Continuous, hiccup and auto-recovery mode.
During a short circuit condition the converter will shut down. The average current during this condition will be very low
and damage to this device should not occur.
Thermal Consideration
The power module operates in a variety of thermal environments. However, sufficient cooling should be provided to
help ensure reliable operation of the unit. Heat is removed by conduction, convection, and radiation to the surrounding
Environment. Proper cooling can be verified by measuring the point as shown in the figure below. The temperature at
this location should not exceed 105 ºC. When Operating, adequate cooling must be provided to maintain the test point
temperature at or below 105 ºC. Although the maximum point Temperature of the power modules is 105 ºC,
maintaining a lower operating temperature will increase the reliability of this device.
TEMPERATURE MEASURE POINT
Heat Sink Consideration
The addition of a heat sink may be needed to decrease the temperature of the module; thus increasing its reliability.
7G-0047C-F
All dimensions in millimeters
PXB15-xxWDxx
21
Data Sheet
Jul. 20, 2010
15W, Dual Output
Remote ON/OFF Control
The Remote ON/OFF Pin is used t o turn the DC/DC power module on and off. The user must connect a switch
between the on/off pin and the Vi (-) pin. The switch can be an open collector transistor, FET, or Photo-Coupler. The
switch must be capable of sinking up to 1 mA when using a low logic level voltage. When using a high logic level,
the maximum signal voltage is 15V and the maximum allowable leakage current of the switch is 50 uA.
Remote ON/OFF Implementation Circuits
Isolated-Closure Remote ON/OFF
Level Control Using TTL Output
Level Control Using Line Voltage
There are two remote control options available, positive logic and negative logic.
a. Positive logic - The DC/DC module is turned on when the ON/OFF pin is at a high logic level. A low logic signal is
needed to turn off the device.
When PXB15W module is turned off at When PXB15W module is turned on
Low logic level
at High logic level
b. Negative logic – The DC/DC module is turned on when the ON/OFF pin is at low logic level. Ahigh logic level signal is
needed to turn off the device.
When PXB15W module is turned on at When PXB15W module is turned off
Low logic level
at High logic level
PXB15-xxWDxx
22
Data Sheet
Jul. 20, 2010
15W, Dual Output
Mechanical Data
PIN CONNECTION
PIN
1
2
3
4
5
6
PXB15-WD Series
+ INPUT
- INPUT
ON/OFF
+VOUT
COMMON
-VOUT
OPTIONS
1. All dimensions in Inches (mm)
Tolerance: X.XX±0.02 (X.X±0.5)
X.XXX±0.01 (X.XX±0.25)
2. Pin pitch tolerance ±0.01(0.25)
3. Pin dimension tolerance ±0.004 (0.1)
Suffix
Description
P
N
T
+ INPUT
- INPUT
ON/OFF
-NT as standard. Delete
suffix if not required
PXB15-xxWDxx
23
Data Sheet
Jul. 20, 2010
15W, Dual Output
Recommended Pad Layout
Soldering Considerations
PXB15-xxWDxx
24
Data Sheet
Jul. 20, 2010
15W, Dual Output
Lead free wave solder profile for PXB15-xxWDxx-SERIES
Zone
Preheat zone
Actual heating
Reference Parameter.
Rise temp. speed: 3 ºC /sec max.
Preheat temp.: 100~130 ºC
Peak temp.: 250~260 ºC
Peak time(T1+T2 time): 4~6 sec
Reference Solder: Sn-Ag-Cu; Sn-Cu
Hand Welding: Soldering iron: Power 90W
Welding Time: 2~4 sec
Temp.: 380~400 ºC
Packaging Information
300
26.5
19
6
All dimensions in millimeters
10 PCS per TUBE
PXB15-xxWDxx
25
Data Sheet
Jul. 20, 2010
15W, Dual Output
Part Number Structure
PXB 15 – 24W D 05 -A
Total Output power
15 Watt
Option Suffix
Input Voltage Range
24xxx : 9~36V
48xxx : 18~75V
Output Voltage
05 : ±5V
12 : ±12V
15 : ±15V
Dual Output
Model
Number
Input
Range
Output
Voltage
(2)
Output Current
Full Load
Input Current
(1)
Full Load
Eff
(%)
±1500mA
±625mA
±500mA
±1500mA
±625mA
±500mA
772mA
753mA
744mA
386mA
382mA
377mA
85
87
88
85
86
87
PXB15-24WD05
9 - 36 VDC
±5VDC
PXB15-24WD12
9 - 36 VDC
±12VDC
PXB15-24WD15
9 - 36 VDC
±15VDC
PXB15-48WD05
18- 75 VDC
±5VDC
PXB15-48WD12
18 - 75 VDC
±12VDC
PXB15-48WD15
18 - 75 VDC
±15VDC
Note 1. Maximum value at nominal input voltage and full load.
Note 2. Typical value at nominal input voltage and full load.
Safety and Installation Instruction
Fusing Consideration
Caution: This power module is not internally fused. An input line fuse must always be used.
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone
operation to an integrated part of sophisticated power architecture. For maximum flexibility, internal fusing is not
included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety
agencies require a normal-blow fuse with maximum rating of 3A for PXB15-24WDXX modules and 1.5A for
PXB15-48WDXX modules. Based on the information provided in this data sheet on Inrush energy and maximum DC
input current; the same type of fuse with lower rating can be used. Refer to the fuse manufacturer’s data for further
information.
MTBF and Reliability
The MTBF of PXB15WD SERIES of DC/DC converters has been calculated using
Bellcore TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40 ºC (Ground fixed and controlled
6
environment ). The resulting figure for MTBF is 1.330×10 hours.
MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25 ºC . The resulting figure for MTBF is
5
5.630×10 hours.
PXB15-xxWDxx
26
