PXF40-xxTxx Triple Output DC/DC Converters
9 to 18 Vdc and 18 to 36 Vdc and 36 to 75 Vdc input, 3.3 to ±15 Vdc Triple Output, 40W
Features
Triple output current up to 6A
40 watts maximum output power
2:1 wide input voltage range
Six-sided continuous shield
High efficiency up to 88%
Low profile: 2.002.000.40 inch (50.850.810.2 mm )
Fixed switching frequency
RoHS 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
Options
APPLICATIONS
Wireless Network
Telecom/Datacom
Industrial Control
Test & Measurement
Semiconductor Equipment
Heat sinks available for extended operation
General Description
The PXF40xxTxxxx series offers 40 watts of output power from a 2 x 2 x 0.4 inch package. It has a 2:1 wide input
voltage range of 9-18VDC,18-36VDC and 36-75VDC and features 1600VDC of isolation, short-circuit and
over-voltage protection.
Table of Contents
Absolute Maximum Ratings
Output Specification
Input Specification
General Specification
Characteristic Curves
Test Configurations
EMC Consideration
Input Source Impedance
Output Over Current Protection
Output Over Voltage Protection
Short Circuit Protection
P2
P2
P3
P4
P5
P29
P30
P32
P32
P33
P33
Thermal Consideration
Heat Sink Consideration
Remote ON/OFF Control
Mechanical Data
Recommended Pad Layout
Soldering and Reflow Consideration
Packaging Information
Part Number Structure
Safety and Installation Instruction
MTBF and Reliability
P33
P34
P35
P36
P37
P38
P39
P39
P40
P40
DataSheet
40W, Triple Output
Absolute Maximum Rating
Parameter
Model
Input Voltage
Continuous
Min
12Txxxx
24Txxxx
48Txxxx
12Txxxx
24Txxxx
48Txxxx
All
All
All
Transient (100ms)
Operating Ambient Temperature (with derating)
Operating Case Temperature
Storage Temperature
Max
Unit
18
36
75
36
50
100
85
100
105
-40
-55
Vdc
°C
°C
°C
Output Specification
Parameter
Output Voltage
(Vin = Vin(nom) ; Full Load ; TA=25°C)
Model
xxT3312
Min
3.267/±11.4
Typ
3.3 /±12
Max
3.333/±12.6
xxT3315
3.267/±14.25
3.3 /±15
3.333/±15.75
xxT0512
4.95/±11.4
5 /±12
5.05/±12.6
xxT0515
4.95/±14.25
5 /±15
5.05/±15.75
Unit
Vdc
Output Regulation
Line (Vin(min) to Vin(max) at Full Load)
Load (Min. to 100% of Full Load)
Main
-1
+1
Auxiliary
-5
+5
Main
-2
+2
Auxiliary
-5
+5
%
Output Ripple & Noise (See Page 29 )
Peak-to-Peak (20MHz bandwidth)
(Measured with a 0.1μF/50V MLCC)
Temperature Coefficient
Output Voltage Overshoot
(Vin(min) to Vin(max) ; Full Load ; TA=25°C )
All
All
50 / 75
-0.02
mVp-p
+0.02
%/℃
5
% Vo
All
0
All
250
mV
All
250
μS
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
Settling Time (VOUT＜10% peak deviation)
Output Current
Output Over Voltage Protection
(Zener diode clamp)
xxT3312
600 ± 40
6000 / ±400
xxT3315
600 ± 30
6000 / ±300
xxT0512
600 ± 40
6000 / ±400
xxT0515
600 ± 30
6000 / ±300
xxT3312
3.9/15
xxT3315
3.9/18
xxT0512
6.2/15
xxT0515
6.2/18
Output Over Current Protection
All
Output Short Circuit Protection
All
mA
Vdc
150
% FL.
Hiccup, automatic recovery
VER:00 Page 2 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Input Specification
Parameter
Operating Input Voltage
Input Current
(Maximum value at Vin = Vin(nom); Full Load)
Model
Min
Typ
Max
12Txxxx
9
12
18
24Txxxx
18
24
36
48Txxxx
36
48
(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 29)
(5 to 20MHz, 12μH Source Impedance)
Vdc
75
12T3312
3063
12T3315
3000
12T0512
4024
12T0515
3963
24T3312
1512
24T3315
1481
24T0512
1989
24T0515
1958
48T3312
747
48T3315
732
48T0512
982
48T0515
Input Standby Current
Unit
mA
967
12T3312
215
12T3315
230
12T0512
280
12T0515
255
24T3312
65
24T3315
65
24T0512
60
24T0515
75
48T3312
35
48T3315
35
48T0512
30
48T0515
40
mA
12Txxxx
9
24Txxxx
17.8
48Txxxx
36
12Txxxx
8
24Txxxx
16
48Txxxx
34
All
40
Vdc
Vdc
mAp-p
Start Up Time
(Vin = Vin(nom) and Constant Resistive Load)
Power Up
All
25
Remote ON/OFF
25
Remote ON/OFF Control (See Page 35)
Vdc
(The ON/OFF pin voltage is referenced to -VIN)
Positive Logic
DC-DC ON
mS
All
DC-DC OFF
Remote Off Input Current
All
Input Current of Remote Control Pin
All
3.5
12
0
1.2
2.5
-0.5
mA
+0.5
mA
VER:00 Page 3 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
General Specification
Parameter
Efficiency (See Page 29 )
(Vin = Vin(nom) ; Full Load ; TA=25°C )
Model
Min
Typ
12T3312
84
12T3315
84
12T0512
86
12T0515
86
24T3312
85
24T3315
85
24T0512
87
24T0515
87
48T3312
86
48T3315
86
48T0512
88
48T0515
88
Max
Unit
%
Isolation Voltage
Input to Output
All
Input to Case, Output to Case
Vdc
1600
1600
Isolation Resistance
All
Isolation Capacitance
All
1
GΩ
Switching Frequency
All
300
KHz
Weight
All
60
g
All
1.398×10
5
3.585×10
hours
All
115
℃
1000
pF
MTBF(See Page 41 )
Bellcore TR-NWT-000332, TC=40°C ℃
MIL-HDBK-217F
Over Temperature Protection
6
VER:00 Page 4 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves
All test conditions are at 25°C. The figures are for PXF40-12T3312
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin = Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 5 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T3312
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T3315
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 7 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T3315
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T0512
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 9 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T0512
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T0515
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 11 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-12T0515
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24T3312
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 13 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24T3312
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24T3315
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 15 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF24T3315
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF24T0512
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 17 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24T0512
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24T0515
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 19 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24T0515
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 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF48T3312
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 21 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T3312
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 22 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T3315
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 23 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T3315
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 24 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T0512
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating Output CurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 25 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T0512
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 26 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T0515
Efficiency Versus Output Current
Efficiency Versus Input Voltage. Full Load
Power Dissipation Versus Output Current
Derating OutputCurrentVersusAmbientTemperature and
Airflow Vin=Vin(nom)
Derating OutputCurrentVersusAmbientTemperature with Heat-Sink
andAirflow, Vin = Vin(nom)
VER:00 Page 27 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48T0515
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 28 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Test Configurations
Input reflected-ripple current measurement test:
Component
L
C
Value
12μH
220μF
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
100%
Efficiency o
Vin I in
VER:00 Page 29 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
EMC Considerations
Suggested Schematic for EN55022 Conducted Emission Class A Limits
Recommended Layout with Input Filter
To meet conducted emissions EN55022 CLASS A needed the following components：
PXF40-12Txxxx
Component
C1
C3、C4
Value
6.8uF
1000pF
Voltage
50V
2KV
1812 MLCC
1808 MLCC
PXF40-24Txxxx
Component
C1
C3、C4
Value
6.8uF
1000pF
Voltage
50V
2KV
1812 MLCC
1808 MLCC
PXF40-48Txxxx
Component
C1
C3、C4
Value
2.2uF
1000pF
Voltage
100V
2KV
1812 MLCC
1808 MLCC
Reference
Reference
Reference
VER:00 Page 30 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple 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 needed the following components：
PXF40-12Txxxx
Component
C1、C3
C5、C6
L1
Value
4.7uF
1000pF
450uH
Voltage
50V
2KV
----
Reference
1812 MLCC
1808 MLCC
Common Choke
PXF40-24Txxxx
Component
C1、C3
C5、C6
L1
Value
6.8uF
1000pF
450uH
Voltage
50V
2KV
----
Reference
1812 MLCC
1808 MLCC
Common Choke
PXF40-48Txxxx
Component
C1、C2
C3、C4
C5、C6
L1
Value
2.2uF
2.2uF
1000pF
830uH
Voltage
100V
100V
2KV
----
Reference
1812 MLCC
1812 MLCC
1808 MLCC
Common Choke`
VER:00 Page 31 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
VER:00 Page 32 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
EMC Considerations (Continued)
This Common Choke L1 has been define as follows:
■
L1：450μH±35% / DCR：25mΩ, max
A height：9.8 mm, Max
■
L1：830μH±35% / DCR：31mΩ, max
A height：8.8 mm, Max
■ Test condition：100KHz / 100mV
■ Recommended through hole：Φ0.8mm
■ All dimensions in millimeters
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. Input external L-C filter is recommended to minimize input reflected ripple
current. The inductor has a source impedance of 12μH and capacitor is Nippon chemi-con KY series 220μF/100V.
The capacitor must be located as close as possible to the input terminals of the power module for lowest 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 PXF40-xxTxxxx series.
Hiccup-mode is a method of operation in a converter whose purpose is to protect the power supply from being
damaged during an over-current fault condition. It also enables the converter to restart when the fault is removed.
There are other ways of protecting the converter when it is over-loaded, such as the maximum current limiting or
current foldback methods.
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 these devices may exceed their specified limits. A
protection mechanism has to be used to prevent these power devices from being damaged.
The operation of hiccup is as follows. When the current sense circuit sees an over-current event, the controller
shuts off the converter for a given time and then tries to start up the converter again. If the over-load condition has
been removed, the converter will start up and operate normally; otherwise, the controller will see another over-current
event and will shut off the converter again, repeating the previous cycle. Hiccup operation has none of the drawbacks
of the other two protection methods, although its circuit is more complicated because it requires a timing circuit. The
excess heat due to overload lasts for only a short duration in the hiccup cycle, hence the junction temperature of the
power devices is much lower.
VER:00 Page 33 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
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.
Short Circuit Protection
Continuous, hiccup and auto-recovery mode.
During a short circuit the converter shuts down. The average current during this condition will be very low.
Thermal Consideration
The converter 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 100°C. When operating, adequate cooling must be provided to maintain the test point
temperature at or below 100°C. Although the maximum point temperature of the power module is 100°C, limiting this
temperature to a lower value will increase the reliability of the unit.
VER:00 Page 34 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Heat Sink Consideration
All dimensions in millimeters
Use heat-sink (7G-0026A) for lowering temperature and higher reliability of the module.
VER:00 Page 35 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Remote ON/OFF Control
The Remote ON/OFF Pin is used to turn on and off the DC-DC converter. The user must use a switch to control
the logic voltage (high or low level ) of the ON /OFF pin, referenced to Vi (-). The switch can be a open collector
transistor, FET, or Opto-Coupler, that is capable of sinking up to 0.5 mA at a low-level logic Voltage. For high-level logic
of the ON/OFF signal (maximum voltage): the 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
Positive logic:
PXF40 module is turned off using
PXF40 module is turned on using
Low-level logic
High-level logic
VER:00 Page 36 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Mechanical Data
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
PIN
1
2
3
4
5
6
7
8
9
FUNCTION
+INPUT
-INPUT
CTRL
+AUX
COMMON
-AUX
+OUTPUT
COMMON
NC
VER:00 Page 37 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Recommended Pad Layout
TOP VIEW
1.All dimensions in Inches (mm)
Tolerance: X.XX±0.02 (X.X±0.5)
2. Pin pitch tolerance ±0.014(0.35)
VER:00 Page 38 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Soldering and Reflow Consideration
Lead free wave solder profile for PXF40xxTxxxx DIP type
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
Soldering Time -2 to 4 sec
Temp.:380 - 400°C
VER:00 Page 39 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Packaging Information
10 PCS per TUBE
Part Number Structure
PXF 40 – 48 T 0512
Max. Output Power
40 Watts
Input Voltage Range
12 : 9 ~18 V
24 : 18 ~ 36 V
48 : 36 ~ 75 V
Output Voltage
3312 : 3.3 /±12Vdc
3315 : 3.3 /±15Vdc
0512 : 5 /±12Vdc
0515 : 5 /±15Vdc
Triple Output
Model
Number
Input
Range
Output
Voltage
Output Current
Min. load
Full Load
3.3 / ±12 VDC 600mA/ ±40mA 6000mA/ ±400mA
PXF40-12T3312
9 – 18 VDC
3.3 / ±15 VDC 600mA/ ±30mA 6000mA/ ±300mA
PXF40-12T3315
9 – 18 VDC
5 / ±12 VDC 600mA/ ±40mA 6000mA/ ±400mA
PXF40-12T0512
9 – 18 VDC
5 / ±15 VDC 600mA/ ±30mA 6000mA/ ±300mA
PXF40-12T0515
9 – 18 VDC
PXF40-24T3312 18 – 36 VDC 3.3 / ±12 VDC 600mA/ ±40mA 6000mA/ ±400mA
PXF40-24T3315 18 – 36 VDC 3.3 / ±15 VDC 600mA/ ±30mA 6000mA/ ±300mA
5 / ±12 VDC 600mA/ ±40mA 6000mA/ ±400mA
PXF40-24T0512 18 – 36 VDC
5 / ±15 VDC 600mA/ ±30mA 6000mA/ ±300mA
PXF40-24T0515 18 – 36 VDC
PXF40-48T3312 36 – 75 VDC 3.3 / ±12 VDC 600mA/ ±40mA 6000mA/ ±400mA
PXF40-48T3315 36 – 75 VDC 3.3 / ±15 VDC 600mA/ ±30mA 6000mA/ ±300mA
5 / ±12 VDC 600mA/ ±40mA 6000mA/ ±400mA
PXF40-48T0512 36 – 75 VDC
5 / ±15 VDC 600mA/ ±30mA 6000mA/ ±300mA
PXF40-48T0515 36 – 75 VDC
Note 1. Typical value at nominal input voltage and no load.
Note 2. Maximum value at nominal input voltage and full load of standard type.
Note 3. Typical value at nominal input voltage and full load.
(3)
Input Current
(1)
No load
215mA
230mA
280mA
255mA
65mA
65mA
60mA
75mA
35mA
35mA
30mA
40mA
Eff
(%)
Full Load
(2)
3063mA
3000mA
4024mA
3963mA
1512mA
1481mA
1989mA
1958mA
747mA
732mA
982mA
967mA
84
84
86
86
85
85
87
87
86
86
88
88
VER:00 Page 40 of 40 Issued Date：2009/03/02
DataSheet
40W, Triple Output
Safety and Installation Instructions
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 maximum rating of 8A. 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-xxT-xxxx triple output 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 1.398×10 hours.
MIL-HDBK-217F NOTICE2 FULL LOAD, Operating Temperature at 25°C ℃. The resulting figure for MTBF is
5
3.585×10 hours.
VER:00 Page 41 of 40 Issued Date：2009/03/02
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