PXF40xxWSxx Single Output DC/DC Converter
9 to 36 Vdc and 18 to 75 Vdc input, 3.3 to 15 Vdc Single Output, 40W
Features
Single output current up to 10A
40 watts maximum output power
4:1 ultra wide input voltage range of 9-36 and 18-75VDC
Six-sided continuous shield
Case grounding
High efficiency up to 88%
Low profile: 2.00 x 2.00 x 0.40 inch (50.8x50.8x10.2 mm )
Fixed switching frequency
RoHS directive compliant
Input to output isolation: 1600Vdc,min
Over-temperature protection
Input under-voltage protection
Output over-voltage protection
Over-current protection, auto-recovery
Output short circuit protection, auto-recovery
Remote ON/OFF
Applications
Wireless Network
Telecom/Datacom
Industry Control System
Measurement Equipment
Semiconductor Equipment
Options
Heat sinks available for extended operation
Remote ON/OFF logic configuration
General Description
The PXF40-xxWSxx single output offers 40 watts of output power from a 2.00 x 2.00 x 0.4 inch package.
This series with 4:1 ultra wide input voltage of 9-36VDC and 18-75VDC, features 1600VDC of isolation,
short-circuit,over-voltage and over-temperature protection, as well as six sided shielding. All models are
particularly suited for telecommunications, industrial, mobile telecom and test equipment applications.
Table of Contents
Absolute Maximum Rating
Output Specification
Input Specification
General Specification
Characteristic Curves
Test Configurations
EMC Considerations
Input Source Impedance
Output Over Current Protection
Output Over Voltage Protection
Thermal Consideration
P2
P2
P3
P4
P5
P21
P22
P24
P24
P24
P25
Heat Sink Consideration
Remote ON/OFF Control
Mechanical Data
Recommended Pad Layout
Output Voltage Adjustment
Remote Sense Application Circuit
Soldering Consideration
Packaging Information
Part Number Structure
Safety and Installation Instruction
MTBF and Reliability
P25
P26
P27
P27
P28
P29
P29
P30
P30
P31
P31
DataSheet
40W, Single Output
Absolute Maximum Ratings
Parameter
Model
Input Voltage
Continuous
Transient (100ms)
Operating Ambient Temperature (with derating)
Operating Case Temperature
Storage Temperature
24WSxx
48WSxx
24WSxx
48WSxx
All
All
All
Min
Max
Unit
36
75
50
100
105
105
125
-40
-55
VDC
°C
°C
°C
Output Specifications
Parameter
Output Voltage
(Vin = Vin(nom) ; Full Load ; TA=25°C)
Voltage Adjustability
Model
Min
Typ
Max
xxWS3P3
3.267
3.3
3.333
Unit
xxWS05
4.95
5
5.05
xxWS12
11.88
12
12.12
xxWS15
14.85
15
15.15
All
-10
+10
%
All
-0.2
+0.2
%
-0.5
+0.5
VDC
Output Regulation
Line (Vin(min) to Vin(max) at Full Load)
Load (Min. to 100% of Full Load)
Output Ripple & Noise
Peak-to-Peak (20MHz bandwidth)
xxWS3P3
50
xxWS05
50
xxWS12
75
xxWS15
Temperature Coefficient
Output Voltage Overshoot
(Vin(min) to Vin(max) ; Full Load ; TA=25°C)
All
mVp-p
75
-0.02
All
+0.02
%/°C
3
% VOUT
Dynamic Load Response
(Vin = Vin(nom) ; TA=25°C)
Load step change from
75% to 100% or 100 to 75% of Full Load
Peak Deviation
Setting Time (VOUT-10% peak deviation)
Output Current
Output Over Voltage Protection
(Zener diode clamp)
All
250
mV
All
250
μS
xxWS3P3
0
10000
xxWS05
0
8000
xxWS12
50
3333
xxWS15
50
2666
xxWS3P3
3.9
xxWS05
6.2
xxWS12
15
xxWS15
18
Output Over Current Protection
All
Output Short Circuit Protection
All
mA
VDC
150
% FL.
Hiccup, automatic recovery
VER:00 Page 2 of 31 Issued Date：2009/03/02
DataSheet
40W, 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
Under Voltage Lockout Turn-off Threshold
Input Reflected Ripple Current
(5 to 20MHz, 12μH Source Impedance)
Model
Min
Typ
Max
24WSxx
9
24
36
48WSxx
18
48
75
24WS3P3
1677
24WS05
2008
24WS12
2008
24WS15
2008
48WS3P3
838
48WS05
992
48WS12
1004
48WS15
1004
24WS3P3
80
24WS05
100
24WS12
50
24WS15
50
48WS3P3
60
48WS05
65
48WS12
30
48WS15
30
9
48WSxx
18
8
48WSxx
16
All
20
VDC
mA
mA
24WSxx
24WSxx
Unit
VDC
VDC
mAp-p
Start Up Time
(Vin = Vin(nom) and Constant Resistive Load)
Power Up
20
All
Remote ON/OFF
mS
20
Remote ON/OFF Control
(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
Input Current of Remote Control Pin
0
1.2
3
12
3
12
0
1.2
24WSxx
10
48WSxx
5
All
-0.5
VDC
mA
0.5
mA
VER:00 Page 3 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
General Specifications
Parameter
Efficiency
(Vin = Vin(nom) ; Full Load ; TA=25°C)
Model
Min
Typ
24WS3P3
86
24WS05
87
24WS12
87
24WS15
87
48WS3P3
86
48WS05
88
48WS12
87
48WS15
87
Max
Unit
%
Isolation Voltage
Input to Output
All
Input (Output) to Case
VDC
1600
1600
Isolation Resistance
All
1
GΩ
Isolation Capacitance
All
Switching Frequency
All
300
KHz
Weight
All
60
g
All
1.105×106
2500
pF
MTBF(See Page 31)
Bellcore TR-NWT-000332, TC=40°C
1.511×105
MIL-HDBK-217F
Over Temperature Protection
All
110
hours
°C
VER:00 Page 4 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves
All test conditions are at 25°C.The figures are for PXF40-24WS3P3.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin = Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 5 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WS3P3.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin = Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin = Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin = Vin(nom), Full Load
Vin = Vin(nom), Full Load
VER:00 Page 6 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WS05.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 7 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WS05.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 8 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WS12.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 9 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WS12.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 10 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C..The figures are for PXF40-24WS15.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 11 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WS15.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 12 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25C. The figures are for PXF40-48WS3P3
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating Output CurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 13 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WS3P3.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 14 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C..The figures are for PXF40-48WS05.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 15 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WS05.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 16 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WS12.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 17 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WS12.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 18 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are identical for PXF40-48WS15.
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature andAirflow
Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 19 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WS15.
Typical Output Ripple and Noise.
Transient Response to Dynamic Load Change from
Vin=Vin(nom), Full Load
100% to 75% to 100% of Full Load ; Vin=Vin(nom)
Typical Input Start-Up and Output Rise Characteristic
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 A
Conduction Emission of EN55022 Class B
Vin=Vin(nom), Full Load
Vin=Vin(nom), Full Load
VER:00 Page 20 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Test Configurations
Input reflected-ripple current measurement test:
Component
L
C
Value
12μH
47μF
Voltage
---100V
Reference
---Aluminum Electrolytic Capacitor
Peak-to-peak output ripple & noise measurement test:
Output voltage and efficiency measurement test:
Note:All measurements are taken at the module terminals.
V Io
Efficiency o
Vin I in
100%
VER:00 Page 21 of 31 Issued Date：2009/03/02
DataSheet
40W, Single 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:
Value
PXF40-24WSxx
Voltage
Component
C1,C2
C3,C4
----
----
1000pF
2KV
Component
C1,C2
C3,C4
Value
2.2uF
1000pF
Reference
----
1206 MLCC
PXF40-48WSxx
Voltage
Reference
100V
1812 MLCC
2KV
1206 MLCC
VER:00 Page 22 of 31 Issued Date：2009/03/02
DataSheet
40W, 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:
Component
C1,C3
C5,C6
L1
Value
4.7uF
1000pF
450uH
Component
Value
C1,C2
2.2uF
C3,C4
2.2uF
C5,C6
1000pF
L1
830uH
This Common Choke L1 is defined as follows:
PXF40-24WSxx
Voltage
Reference
50V
1812 MLCC
2KV
1206 MLCC
---Common Choke
PXF40-48WSxx
Voltage
Reference
100V
1812 MLCC
100V
1812 MLCC
2KV
1206 MLCC
---Common Choke
■
L: 450μH±35% / DCR:25mΩ, max
A height:9.8 mm, Max
■
L: 830μH±35% / DCR:31mΩ, max
A height:8.8 mm, Max
■ Test condition:100KHz / 100mV
■ Recommended through hole:Φ0.8mm
■ All dimensions in millimeters
VER:00 Page 23 of 31 Issued Date：2009/03/02
DataSheet
40W, 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 DC-DC converter. Input external L-C filter is recommended to minimize input reflected
ripple current. The inductor has a simulated source impedance of 12μH and the capacitor is Nippon chemi-con KZE
series 47μF/100V. The capacitor must be located as close as possible to the input terminals of the converter for lower
impedance.
Output Over Current Protection
When excessive output currents occur in the system, circuit protection is required on all converters. Normally,
overload current is maintained at approximately 150 percent of rated current for PXF40-xxWsxx series.
Hiccup-mode is a method of operation in the converter whose purpose is to protect the converter from being
damaged during an over-current fault condition. It also enables the converter 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 an output Zener diode that monitors the voltage on the output
terminals. If the voltage on the output terminals exceeds the over-voltage protection threshold, then the Zener diode
clamps the output voltage.
VER:00 Page 24 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Thermal Consideration
The converter operates in a variety of thermal environments. 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°C. When operating, adequate cooling must be provided to maintain the test point
temperature at or below 105°C. Although the maximum point temperature of the converter is 105°C, limiting this
temperature to a lower value will increase the reliability of the unit.
Heat Sink Consideration
Use heat-sink (7G-0026A) for lowering temperature; thus increasing the reliability of the converter.
All dimensions in millimeters
VER:00 Page 25 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Remote ON/OFF Control
The Remote ON/OFF Pin is used to turn the converter on and off. The user must use a switch to control the logic
voltage (high or low level) of the pin referenced to Vi (-). The switch can be an open collector transistor, FET or
Opto-Coupler. The switch must be capable of sinking up to 0.5 mA at low-level logic voltage. Using High-level logic, the
maximum allowable leakage current of the switch at 12V is 0.5 mA.
Remote ON/OFF Implementation Circuits
Isolated-Control 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:
Turned off at Low-level logic
Tturned on at High-level logic
b. Negative logic:
Turned on at Low-level logic
Turned off at High-level logic
VER:00 Page 26 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Mechanical Data
2.00 (50.8)
DIA. 0.04(1.0)
1.10 (27.9)
0.400 (10.16)
3
2
1
6 5
1.800 (45.72)
2.00 (50.8)
BOTTOM
VIEW
8 7
4
0.10 (2.5)
0.100 (2.54)
0.300 (7.62)
0.600 (15.24)
0.800 (20.32)
PIN
1
2
3
4
5
6
7
8
0.40(10.2)
0.200 (5.08)
0.200 (5.08)
0.22 (5.6)
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)
PIN CONNECTION
EXTERNAL OUTPUT TRIMMING
FUNCTION
+INPUT
-INPUT
CTRL
-SENSE
+SENSE
+OUTPUT
-OUTPUT
TRIM
Output can be externally trimmed by
using the method shown below.
TRIM UP
TRIM DOWN
4
8
RU
8
RD
5
Recommended Pad Layout
VER:00 Page 27 of 31 Issued Date：2009/03/02
DataSheet
40W, 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 SENSE(+) or
SENSE(-) pins. With an external resistor between the TRIM and SENSE(-) pin, the output voltage set point increases.
With an external resistor between the TRIM and SENSE(+) pin, the output voltage set point decreases.
TRIM UP
TRIM DOWN
4
8
RU
RD
5
8
TRIM TABLE
PXF40-xxWS3P3
Trim up (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
3.333
3.366
3.399
3.432
3.465
3.498
3.531
3.564
3.597
3.630
RU (K Ohms)=
57.930
26.165
15.577
10.283
7.106
4.988
3.476
2.341
1.459
0.753
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)=
69.470
31.235
18.490
12.117
8.294
5.745
3.924
2.559
1.497
0.647
PXF40-xxWS05
Trim up (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
5.050
5.100
5.150
5.200
5.250
5.300
5.350
5.400
5.450
5.500
RU (K Ohms)=
36.570
16.580
9.917
6.585
4.586
3.253
2.302
1.588
1.032
0.588
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
RD (K Ohms)=
45.533
20.612
12.306
8.152
5.660
3.999
2.812
1.922
1.230
0.676
1
2
3
PXF40-xxWS12
Trim up (%)
4
5
6
7
8
9
10
VOUT (Volts)=
12.120
12.240
12.360
12.480
12.600
12.720
12.840
12.960
13.080
13.200
RU (K Ohms)=
367.910
165.950
98.636
64.977
44.782
31.318
21.701
14.488
8.879
4.391
Trim down (%)
1
VOUT (Volts)=
RD (K Ohms)=
2
3
4
11.880
11.760
11.640
11.520
460.990
207.950
123.600
81.423
2
3
4
5
11.400
6
7
8
9
10
10.920
10.800
18.162
11.132
5.509
8
9
10
11.280
11.160
11.040
56.118
39.249
27.199
5
6
7
PXF40-xxWS15
Trim up (%)
1
VOUT (Volts)=
15.150
15.300
15.450
15.600
15.750
15.900
16.050
16.200
16.350
16.500
RU (K Ohms)=
404.180
180.590
106.060
68.796
46.437
31.531
20.883
12.898
6.687
1.718
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
14.850
14.700
14.550
14.400
14.250
14.100
13.950
13.800
13.650
13.500
RD (K Ohms)=
499.820
223.410
131.270
85.204
57.563
39.136
25.974
16.102
8.424
2.282
VER:00 Page 28 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Remote Sense Application Circuit
The Remote Sense function, when used, regulates the voltage at the load terminals; this
compensates for any voltage drop that may exist between the output of the converter and the load. The
voltage compensation is limited to less than 10 % of the nominal output voltage rating of the converter.
i.e.:
[Vo (+) to Vo (-)] – [Sense (+) to Sense (-)] < 10% Vo
If the Remote Sense function is not used the SENSE (+) should be connected to OUTPUT (+) and
the SENSE (-) should be connected to OUTPUT(-) of the converter.
Remote Sense shown connected to the load.
Soldering Consideration
Lead free wave solder profile for PXF40WS-SERIES
Zone
Preheat zone
Reference Parameter
Rise temp. speed : 3°C/ sec max.
Preheat temp. : 100~130°C
Actual heating
Peak temp. : 250~260°C
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 °C
VER:00 Page 29 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Packaging Information
10 PCS per TUBE
Part Number Structure
PXF 40 – 48 WS 05 – N
Max. Output Power
40Watts
Negative Logic
Output Voltage
3P3 : 3.3V
05 : 5V
12 : 12V
15 : 15V
Input Voltage Range
24 : 9 ~ 36V
48 : 18 ~ 75V
Single Output
Model
Number
Input
Range
Output
Voltage
PXF40-24WS3P3
9 – 36 VDC
3.3 VDC
PXF40-24WS05
9 – 36 VDC
5 VDC
PXF40-24WS12
9 – 36 VDC
12 VDC
PXF40-24WS15
9 – 36 VDC
15 VDC
PXF40-48WS3P3
18 – 75 VDC
3.3 VDC
PXF40-48WS05
18 – 75 VDC
5 VDC
PXF40-48WS12
18 – 75 VDC
12 VDC
PXF40-48WS15
18 – 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.
Output Current
Full Load
10000mA
8000mA
3333mA
2666mA
10000mA
8000mA
3333mA
2666mA
Input Current
(1)
Full Load
1677mA
2008mA
2008mA
2008mA
838mA
992mA
1004mA
1004mA
(2)
Eff
(%)
86
87
87
87
86
88
87
87
VER:00 Page 30 of 31 Issued Date：2009/03/02
DataSheet
40W, Single Output
Safety and Installation Instruction
Fusing Consideration
Caution: This converter is not internally fused. An input line fuse must always be used.
This encapsulated converter can be used in a wide variety of applications, ranging from simple stand-alone operation
to an integrated part of a 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 slow-blow fuse with a maximum rating of 8A for PXF40-24WSxx converters and 5A for PXF40-48WSxx
converters. Based on the information provided in this data sheet on Inrush energy and maximum DC input current;
the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data for further information.
MTBF and Reliability
The MTBF of PXF40-xxWSxx series of DC/DC converters has been calculated using:
Bellcore TR-NWT-000332 Case I: 50% stress, Operating Temperature at 40°C (Ground fixed and controlled
6
environment ). The resulting figure for MTBF is 1.105×10 hours.
MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25°C ℃. The resulting figure for MTBF is1.511×
5
10 hours.
VER:00 Page 31 of 31 Issued Date：2009/03/02
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