PXB15-xxSxx
Single Output 15 Watt DC/DC Converters
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
Output Voltage Adjustment
P2
P2
P3
P4
P5
P29
P30
P32
P32
P32
P33
Short Circuit Protection
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
P34
P34
P34
P35
P36
P37
P37
P38
P38
P39
P39
Data Sheet
Jul. 20, 2010
15W, Single Output
Absolute Maximum Rating
Parameter
Model
Input Voltage
Continuous
Min
Max
12SXX
24SXX
48SXX
12SXX
24SXX
48SXX
Transient (100mS)
Input Voltage Variation
(complies with ETS300 132 part 4.4)
Operating Ambient Temperature (with derating)
Operating Case Temperature
Storage Temperature
Unit
18
36
75
36
50
100
All
All
-40
All
-55
VDC
5
V/mS
85
105
125
ºC
ºC
ºC
Output Specification
Parameter
Output Voltage Range
(Vin = Vin(nom) ; Full Load ; TA=25 ºC)
Voltage Adjustability(See Page 33)
Model
Min
XXS3P3
3.267
3.3
Typ
3.333
Max
Unit
XXS05
4.95
5
5.05
XXS12
11.88
12
12.12
XXS15
14.85
15
15.15
All
-10
+10
%
All
-0.2
+0.2
%
-0.2
+0.2
VDC
Output Regulation
Line (Vin(min) to Vin(max) at Full Load)
Load (0% to 100% of Full Load)
Output Ripple & Noise(See Page 29)
XXS3P3
Peak-to-Peak (20MHz bandwidth)
XXS05
(Measured with a 1uF M/C and a 10uF T/C )
XXS12
75
mVP-P
100
XXS15
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)
XXS3P3
0
4000
XXS05
0
3000
XXS12
0
1300
XXS15
0
1000
XXS3P3
3.7
5.4
XXS05
5.6
7.0
XXS12
13.5
19.6
XXS15
16.8
20.5
Output Over Current Protection
All
Output Short Circuit Protection
All
150
mA
VDC
% FL.
Hiccup, automatic recovery
PXB15-xxSxx
2
Data Sheet
Jul. 20, 2010
15W, Single Output
Input Specification
Parameter
Operating Input Voltage
Input Current
(Maximum value at Vin = Vin(nom); Full Load)
Input Standby Current
(Typical value at Vin = Vin(nom) ; No Load)
Under Voltage Lockout Turn-on Threshold
Min
Typ
Max
12SXX
Model
9
12
18
24SXX
18
24
36
48SXX
36
48
75
12S3P3
1375
12S05
1524
12S12
1605
12S15
1506
24S3P3
671
24S05
763
24S12
783
24S15
744
48S3P3
336
48S05
372
48S12
387
48S15
372
12S3P3
Input Reflected Ripple Current (See Page 29)
(5 to 20MHz, 12μH source impedance)
VDC
mA
120
12S05
90
12S12
40
12S15
40
24S3P3
50
24S05
65
24S12
20
24S15
20
48S3P3
40
48S05
40
48S12
15
48S15
15
mA
12SXX
9
24SXX
18
48SXX
Under Voltage Lockout Turn-off Threshold
Unit
VDC
36
12SXX
8
24SXX
14.5
48SXX
30.5
VDC
All
30
mAP-P
All
30
mS
Start Up Time
(Vin = Vin(nom) and constant resistive load)
Power up
Remote ON/OFF
30
Remote ON/OFF Control (See Page 35)
(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)
Remote Off Input Current
All
Input Current of Remote Control Pin
All
0
1.2
3
15
3
15
0
1.2
2.5
-0.5
VDC
mA
1.0
mA
PXB15-xxSxx
3
Data Sheet
Jul. 20, 2010
15W, Single Output
General Specification
Parameter
Efficiency(See Page 29)
(Vin = Vin(nom) ; Full Load ; TA=25 ºC)
Model
Min
Typ
12S3P3
84
12S05
86
12S12
85
12S15
87
24S3P3
86
24S05
86
24S12
87
24S15
88
48S3P3
86
48S05
88
48S12
88
48S15
88
Max
Unit
%
Isolation Voltage
Input to Output
All
Input (Output) to Case
1600
VDC
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 39)
Bellcore TR-NWT-000332, TC=40 ºC
MIL-STD-217F
6
hours
5
5.630×10
PXB15-xxSxx
4
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves
All test conditions are at 25 ºC. PXB15-12S3P3
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-xxSxx
5
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S3P3
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-xxSxx
6
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S05
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-xxSxx
7
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S05
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-xxSxx
8
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S12
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-xxSxx
9
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S12
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-xxSxx
10
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S15
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-xxSxx
11
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-12S15
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-xxSxx
12
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S3P3
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-xxSxx
13
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC . PXB15-24S3P3
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-xxSxx
14
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S05
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-xxSxx
15
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S05
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-xxSxx
16
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S12
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-xxSxx
17
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S12
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-xxSxx
18
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S15
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-xxSxx
19
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-24S15
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-xxSxx
20
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S3P3
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-xxSxx
21
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S3P3
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-xxSxx
22
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S05
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-xxSxx
23
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S05
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-xxSxx
24
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S12
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-xxSxx
25
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S12
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-xxSxx
26
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXB15-48S15
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-xxSxx
27
Data Sheet
Jul. 20, 2010
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC . PXB15-48S15
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-xxSxx
28
Data Sheet
Jul. 20, 2010
15W, Single 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-xxSxx
29
Data Sheet
Jul. 20, 2010
15W, Single Output
EMC considerations
C3
－ INPUT
C1
－ INPUT
+Vin
+Vout
-Vin
-Vout
C2
D/D Converter
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
10uF
---470pF
Voltage
25V
---2KV
Component
C1
C2
C3,C4
Value
6.8uF
6.8uF
470pF
Voltage
50V
50V
2KV
Component
C1
C2
C3,C4
Value
2.2uF
2.2uF
470pF
Voltage
100V
100V
2KV
PXB15-12SXX
Reference
1812 MLCC
---1808 MLCC
PXB15-24SXX
Reference
1812 MLCC
1812 MLCC
1808 MLCC
PXB15-48SXX
Reference
1812 MLCC
1812 MLCC
1808 MLCC
PXB15-xxSxx
30
Data Sheet
Jul. 20, 2010
15W, Single Output
EMC considerations (Continued)
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:
PXB15-12SXX
Component
Value
C1,C3
10μF
C2
---C4,C5
470pF
L1
145μH
Voltage
25V
---2KV
----
Reference
1812 MLCC
---1808 MLCC
Common Choke
PXB15-24SXX
Component
Value
C1,C3
6.8μF
C2
---C4,C5
470pF
L1
325μH
Voltage
50V
---2KV
----
Reference
1812 MLCC
---1808 MLCC
Common Choke
PXB15-48SXX
Component
Value
C1,C3
2.2μF
C2
2.2μF
C4,C5
1000pF
L1
325μH
Voltage
100V
100V
2KV
----
Reference
1812 MLCC
1812 MLCC
1808 MLCC
Common Choke
PXB15-xxSxx
31
Data Sheet
Jul. 20, 2010
15W, Single 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 PXB15 single 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-xxSxx
32
Data Sheet
Jul. 20, 2010
15W, Single Output
Output Voltage Adjustment
Output voltage set point adjustment allows the user to increase or decrease the output voltage set point of a module.
This is accomplished by connecting an external resistor between the TRIM pin and either the Vo (+) or Vo (-) pins. With
an external resistor between the TRIM and Vo (-) pin, the output voltage set point increases. With an external resistor
between the TRIM and Vo (+) pin, the output voltage set point decreases.
Trim up equation
G L
RU
H
VO ,up L K
-Vout
RU
Trim down equation
-Vin
VO , down L G
RD
H
VO VO , down
Trim
+Vin
RD
Trim constants
+Vout
Module
G
H
K
L
PXB15-XXS3P3
5110
2050
0.8
2.5
PXB15-XXS05
5110
2050
2.5
2.5
PXB15-XXS12
10000
5110
9.5
2.5
PXB15-XXS15
10000
5110
12.5
2.5
TRIM TABLE
Trim up (%)
VOUT (Volts)=
RU (K Ohms)=
PXB15-XXS3P3
1
2
3
3.333
3.366
3.399
385.071
191.511
126.990
4
3.432
94.730
5
3.465
75.374
6
3.498
62.470
7
3.531
53.253
8
3.564
46.340
9
3.597
10
3.630
40.963
36.662
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
3.267
3.234
3.201
3.168
3.135
3.102
3.069
3.036
3.003
2.970
RD (K Ohms)=
116.719
54.779
34.133
23.810
17.616
13.486
10.537
8.325
6.604
5.228
PXB15-XXS05
Trim up (%)
VOUT (Volts)=
RU (K Ohms)=
1
2
3
4
5
6
7
8
9
10
5.050
5.100
5.150
5.200
5.250
5.300
5.350
5.400
5.450
5.500
253.450
125.700
83.117
61.825
49.050
40.533
34.450
29.888
26.339
23.500
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
4.950
4.900
4.850
4.800
4.750
4.700
4.650
4.600
4.550
4.500
248.340
120.590
RD (K Ohms)=
78.007
56.715
43.940
35.423
29.340
24.778
21.229
18.390
PXB15-XXS12
Trim up (%)
VOUT (Volts)=
1
12.120
2
12.240
3
12.360
4
12.480
5
12.600
6
12.720
7
12.840
8
12.960
9
13.080
10
13.200
RU (K Ohms)=
203.223
99.057
64.334
46.973
36.557
29.612
24.652
20.932
18.038
15.723
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
11.880
11.760
11.640
11.520
11.400
11.280
RD (K Ohms)=
776.557
380.723
248.779
182.807
143.223
116.834
97.985
11.160
83.848
11.040
72.853
10.920
64.057
10.800
Trim up (%)
1
2
5
6
7
8
9
10
PXB15-XXS15
VOUT (Volts)=
15.150
15.300
3
15.450
4
15.600
15.750
15.900
16.050
16.200
16.350
16.500
RU (K Ohms)=
161.557
78.223
50.446
36.557
28.223
22.668
18.700
15.723
13.409
11.557
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
RD (K Ohms)=
14.850
14.700
14.550
14.400
14.250
14.100
13.950
818.223
401.557
262.668
193.223
151.557
123.779
103.938
13.800
89.057
13.650
77.483
13.500
68.223
PXB15-xxSxx
33
Data Sheet
Jul. 20, 2010
15W, Single 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 Measurement 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-xxSxx
34
Data Sheet
Jul. 20, 2010
15W, Single 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 PXB15 module is turned off at When PXB15 module is turned on at
Low logic level
High logic level
b. Negative logic – The DC/DC module is turned on when the ON/OFF pin is at low logic level. A high logic level signal
is needed to turn off the device.
When PXB15 module is turned on at When PXB15 module is turned off at
Low logic level
High logic level
PXB15-xxSxx
35
Data Sheet
Jul. 20, 2010
15W, Single Output
Mechanical Data
PIN CONNECTION
PIN
PXB15 Series
1
2
3
4
5
6
+ INPUT
- INPUT
ON/OFF
+VOUT
TRIM
-VOUT
OPTIONS
1.All dimensions in inches(mm)
2.Tolerance : x.xx±0.02(x.x±0.5)
x.xxx±0.010(x.xx±0.25)
3.Pin pitch tolerance ±0.014(0.35)
Suffix
Description
P
N
T
Positive Logic
Negative Logic
Trim
EXTERNAL OUTPUT TRIMMING
Output can be externally trimmed by using
the method shown below.
TRIM UP
TRIM DOWN
6
5
RU
5
-NT as standard. Delete suffix if
not required
RD
4
PXB15-xxSxx
36
Data Sheet
Jul. 20, 2010
15W, Single Output
Recommended Pad Layout
Soldering Considerations
Lead free wave solder profile for PXB15-SERIES
Zone
Preheat zone
Actual heating
Reference Parameter.
Rise temp. speed: 3 ºC /sec max.
Preheat temp.: 100~130ºC
Peak temp.: 250~260ºC
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
PXB15-xxSxx
37
Data Sheet
Jul. 20, 2010
15W, Single Output
Packaging Information
300
26.5
19
6
All dimensions in millimeters
10 PCS per TUBE
Part Number Structure
PXB 15 – 48 S 05 -A
Total Output power
15 Watt
Input Voltage Range
12xxx : 9~18V
24xxx : 18~36V
48xxx : 36~75V
Model
Number
Option Suffix
Output Voltage
3P3 : 3.3V
05 : 5V
Single Output
Input
Range
Output
Voltage
PXB15-12S3P3
9 - 18 VDC
3.3 VDC
PXB15-12S05
9 - 18 VDC
5 VDC
PXB15-12S12
9 - 18 VDC
12 VDC
PXB15-12S15
9 - 18 VDC
15 VDC
PXB15-24S3P3
18 - 36 VDC
3.3 VDC
PXB15-24S05
18 - 36 VDC
5 VDC
PXB15-12S12
18 - 36 VDC
12 VDC
PXB15-24S15
18 - 36 VDC
15 VDC
PXB15-48S3P3
36 - 75 VDC
3.3 VDC
PXB15-48S05
36 - 75 VDC
5 VDC
PXB15-48S12
36 - 75 VDC
12 VDC
PXB15-48S15
36 - 75 VDC
15 VDC
Note 1. Maximum value at nominal input voltage and full load.
Note 2. Typical value at nominal input voltage and full load.
(2)
Output Current
Full Load
Input Current
(1)
Full Load
Eff
(%)
4000mA
3000mA
1300mA
1000mA
4000mA
3000mA
1300mA
1000mA
4000mA
3000mA
1300mA
1000mA
1375mA
1524mA
1605mA
1506mA
671mA
763mA
783mA
744mA
336mA
372mA
387mA
372mA
84
86
85
87
86
86
87
88
86
88
88
88
PXB15-xxSxx
38
Data Sheet
Jul. 20, 2010
15W, Single Output
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 PXB15-12SXX modules and 1.5A for
PXB15-24SXX modules and 1A for PXB15-48SXX 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 PXB15S 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-xxSxx
39
