PXF40-xxWDxx Dual Output DC/DC Converter
9 to 36 Vdc and 18 to 75 Vdc input, ±12 to ±15 Vdc Dual Output, 40W
Features
Dual output current up to ±1.667A
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 86%
Low profile:2.002.000.40 inch (50.850.810.2 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
Applications
Wireless Network
Telecom/Datacom
Industry Control System
Measurement Equipment
Semiconductor Equipment
Remote ON/OFF
Options
Heat sinks available for extended operation
Remote ON/OFF logic configuration
General Description
The PXF40-xxWDxx dual output converters offer 40 watts of output power from a 2.00 x 2.00 x 0.4 inch
package. This series with a 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 Ratings
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
P13
P14
P16
P16
P16
P16
Heat Sink Consideration
Remote ON/OFF Control
Mechanical Data
Recommended Pad Layout
Output Voltage Adjustment
Soldering Consideration
Packaging Information
Part Number Structure
Safety and Installation Instructions
MTBF and Reliability
P17
P18
P19
P19
P20
P21
P21
P22
P22
P22
DataSheet
40W, Dual Output
Absolute Maximum Rating
Parameter
Model
Input Voltage
Continuous
Transient (100ms)
Operating Ambient Temperature (with derating)
Operating Case Temperature
Storage Temperature
24WDxx
48WDxx
24WDxx
48WDxx
All
All
All
Min
Max
Unit
36
75
50
100
105
105
125
-40
-55
VDC
°C
°C
°C
Output Specification
Parameter
Output Voltage
(Vin = Vin(nom) ; Full Load ; TA=25°C)
Model
Min
Typ
Max
xxWD12
11.88
12
12.12
xxWD15
14.85
15
15.15
All
-0.2
+0.2
-1.0
+1.0
-5.0
+5.0
Unit
VDC
Output Regulation
Line (Vin(min) to Vin(max) at Full Load)
Load (Min. to 100% of Full Load)
Cross Regulation
Asymmetrical Load 25% / 100% of Full Load
Output Ripple & Noise
Peak-to-Peak (20MHz bandwidth)
Temperature Coefficient
Output Voltage Overshoot
(Vin(min) to Vin(max); Full Load; TA=25°C)
All
xxWD12
120
xxWD15
150
All
-0.02
All
%
%
mVp-p
+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
200
mV
All
250
μS
xxWD12
±65
±1667
xxWD15
±50
±1333
xxWD12
15
xxWD15
18
Output Over Current Protection
All
Output Short Circuit Protection
All
mA
VDC
150
% FL.
Hiccup, automatic recovery
VER:00 Page 2 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual 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
24WDxx
9
24
36
48WDxx
18
48
75
24WD12
2032
24WD15
2032
48WD12
1016
48WD15
1016
24WD12
60
24WD15
70
48WD12
30
48WD15
30
9
48WDxx
18
8
48WDxx
16
All
20
VDC
mA
mA
24WDxx
24WDxx
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
0
1.2
3
12
DC-DC ON(Open)
3
12
DC-DC OFF(Short)
0
1.2
Remote Off Input Current
Input Current of Remote Control Pin
24WDxx
10
48WDxx
5
All
-0.5
VDC
mA
0.5
mA
VER:00 Page 3 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
General Specification
Parameter
Efficiency
(Vin = Vin(nom) ; Full Load ; TA=25°C)
Model
Min
Typ
24WD12
86
24WD15
86
48WD12
86
48WD15
86
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
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves
All test conditions are at 25°C.The figures are for PXF40-24WD12
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WD12
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-24WD15
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-24WD15
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WD12
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WD12
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C. The figures are for PXF40-48WD15
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Characteristic Curves (Continued)
All test conditions are at 25°C.The figures are for PXF40-48WD15
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 22 Issued Date：2009/03/02
DataSheet
40W, Dual 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
100%
Efficiency o
Vin I in
VER:00 Page 13 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
EMC Considerations
Suggested Schematic for EN55022 Conducted Emissions Class A Limits
Recommended Layout with Input Filter
To meet conducted emissions EN55022 CLASS A needed the following components：
Value
PXF40-24WDxx
Voltage
Component
C1,C2
C3,C4
----
----
1000pF
2KV
Component
C1,C2
C3,C4
Value
2.2uF
1000pF
Reference
----
1206 MLCC
PXF40-48WDxx
Voltage
Reference
100V
1812 MLCC
2KV
1206 MLCC
VER:00 Page 14 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
EMC Considerations (Continued)
Suggested Schematic for EN55022 Conducted Emissions Class B Limits
Recommended Layout with Input Filter
To meet conducted emissions EN55022 CLASS B needed the following components：
Component
C1,C3
C5,C6
L1
Value
4.7uF
1000pF
450uH
PXF40-24WDxx
Voltage
Reference
50V
1812 MLCC
2KV
1206 MLCC
---Common Choke
PXF40-48WDxx
Component
Value
Voltage
Reference
C1,C2
2.2uF
100V
1812 MLCC
C3,C4
2.2uF
100V
1812 MLCC
C5,C6
1000pF
2KV
1206 MLCC
L1
830uH
---Common Choke
This Common Choke L1 is defined as follows:
■
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 15 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Input Source Impedance
The converter should be connected to a low impedance input source. Highly inductive source impedance can
affect the stability of the 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 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 approximately150 percent of rated current for PXF40-xxWDxx 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.
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 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.
VER:00 Page 16 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
VER:00 Page 17 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
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 18 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual 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-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:
Module is turned off using Low-level
Module is turned on using High-level
logic
logic
Module is turned on using Low-level
Module is turned off using High-level
logic
logic
b. Negative logic:
VER:00 Page 19 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual 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 CONNECTION
PIN
1
2
3
4
5
6
7
8
0.40(10.2)
0.200 (5.08)
FUNCTION
+INPUT
-INPUT
CTRL
+OUTPUT
COM
COM
-OUTPUT
TRIM
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)
EXTERNAL OUTPUT TRIMMING
Output can be externally trimmed by
using the method shown below.
TRIM UP
TRIM DOWN
7
8
RU
8
RD
4
Recommended Pad Layout
VER:00 Page 20 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Output Voltage Adjustment
Output voltage set point adjustment allows the user to increase or decrease the output voltage set point of a
converter. 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
TRIM DOWN
7
8
RU
RD
4
8
TRIM TABLE
PXF40-xxWD12
Trim up (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
±12.12
±12.24
±12.36
RU (K Ohms)=
218.21
98.105
58.07
±12.48
±12.6
±12.72
±12.84
±12.96
±13.08
±13.2
38.052
26.042
18.035
12.316
8.026
4.69
2.021
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
±11.88
±11.76
±11.64
±11.52
±11.4
±11.28
±11.16
±11.04
±10.92
±10.8
RD (K Ohms)=
273.44
123.02
72.874
47.803
32.76
22.732
15.568
10.196
6.017
2.675
Trim up (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
±15.15
±15.3
±15.45
±15.6
±15.75
±15.9
±16.05
±16.2
±16.35
±16.5
RU (K Ohms)=
268.29
120.64
71.429
46.822
32.058
22.215
15.184
9.911
5.81
2.529
PXF40-xxWD15
Trim down (%)
1
2
3
4
5
6
7
8
9
10
VOUT (Volts)=
±14.85
±14.7
±14.55
±14.4
±14.25
±14.1
±13.95
±13.8
±13.65
±13.5
RD (K Ohms)=
337.71
152.02
90.126
59.178
40.609
28.23
19.387
12.756
7.598
3.471
VER:00 Page 21 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Soldering Consideration
Lead free wave solder profile for PXF40-xxWDxx -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
Packaging Information
10 PCS per TUBE
VER:00 Page 22 of 22 Issued Date：2009/03/02
DataSheet
40W, Dual Output
Part Number Structure
PXF40 – 48 WD 12 – N
Max. Output Power
40Watts
Negative Logic
Output Voltage
12 : 12V
15 : 15V
Input Voltage Range
24 : 9 ~ 36V
48 : 18 ~ 75V
Dual Output
Model
Number
Input
Range
Output
Voltage
±12 VDC
PXF40-24WD12
9 – 36 VDC
±15 VDC
PXF40-24WD15
9 – 36 VDC
±12 VDC
PXF40-48WD12
18 – 75 VDC
±15 VDC
PXF40-48WD15
18 – 75 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
Input Current
(2)
Full load
Full Load
Eff
(%)
± 1667mA
± 1333mA
± 1667mA
± 1333mA
2032mA
2032mA
1016mA
1016mA
86
86
86
86
(1)
Safety and Installation Instruction
Fusing Consideration
Caution: This power module 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 for PXF40-24WDxx modules and 5A for
PXF40-48WDxx 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 PXF40-xxWDxx 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 NOTICE 2 FULL LOAD, Operating Temperature at 25°C ℃. The resulting figure for MTBF is1.511×
5
10 hours.
VER:00 Page 23 of 22 Issued Date：2009/03/02
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