PXA15-xxWSxx
Single Output 15 Watt DC/DC Converters
The PXA15 series is approved to UL/CSA/EN/IEC 623681, 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
P21
P22
P24
P24
P24
P25
Short Circuit Protection
Thermal Consideration
Remote ON/OFF Control
Mechanical Data
Recommended Pad Layout
Soldering and Reflow Considerations
Cleaning and Drying Considerations
Part Number Structure
Safety and Installation Instruction
MTBF and Reliability
P26
P26
P27
P28
P29
P30
P31
P32
P32
P32
Data Sheet
12 July, 2022
15W, Single Output
Absolute Maximum Rating
Parameter
Model
Input Voltage
Continuous
Transient (100mS)
Operating Ambient Temperature (with derating)
Storage Temperature
24WSXX
48WSXX
24WSXX
48WSXX
All
All
Min
Max
-40
-55
36
75
50
100
85
125
Unit
VDC
ºC
ºC
Output Specification
Parameter
Output Voltage Range
(Vin = Vin(nom) ; Full Load ; TA=25 ºC)
Voltage Adjustability(See Page 25)
Model
Min
XXWS3P3
3.267
Typ
3.3
Max
Unit
3.333
XXWS05
4.95
5
5.05
XXWS12
11.88
12
12.12
XXWS15
14.85
15
15.15
VDC
All
-10
+10
%
All
-0.2
+0.2
%
-0.2
+0.2
Output Regulation
Line (Vin(min) to Vin(max) at Full Load)
Load (0% to 100% of Full Load)
Output Ripple & Noise(See Page 21)
Peak-to-Peak (20MHz bandwidth)
All
100
mVP-P
(Measured with a 1uF M/C and a 10uF T/C )
Temperature Coefficient
Output Voltage Overshoot
(Vin(min) to Vin(max) ; Full Load ; TA=25 ºC)
All
-0.02
All
+0.02
%/ ºC
3
% VOUT
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)
All
300
mV
All
250
μS
XXWS3P3
0
4000
XXWS05
0
3000
XXWS12
0
1300
XXWS15
0
1000
XXWS3P3
3.7
5.4
XXWS05
5.6
7.0
XXWS12
13.8
17.5
XXWS15
16.8
Output Over Current Protection
All
Output Short Circuit Protection
All
mA
VDC
20.5
150
% FL.
Hiccup, automatics recovery
PXA15-xxWSxx
2
Data Sheet
12 July, 2022
15W, Single Output
Input Specification
Parameter
Operating Input Voltage
Input Current
(Maximum value at Vin = Vin(nom); Full Load)
Model
Min
Typ
Max
24WSXX
9
24
36
48WSXX
18
48
75
24WS3P3
680
24WS05
754
24WS12
793
24WS15
763
48WS3P3
340
48WS05
377
48WS12
397
48WS15
Input Standby Current
(Typical value at Vin = Vin(nom); No Load)
Under Voltage Lockout Turn-on Threshold
Under Voltage Lockout Turn-off Threshold
Input Reflected Ripple Current (See Page 21)
(5 to 20MHz, 12μH source impedance)
Unit
VDC
mA
382
24WS3P3
60
24WS05
70
24WS12
10
24WS15
10
48WS3P3
40
48WS05
40
48WS12
10
48WS15
10
mA
24WSXX
9
48WSXX
18
24WSXX
8
48WSXX
16
All
30
All
30
VDC
VDC
mAP-P
Start Up Time
(Vin = Vin(nom) and constant resistive load)
Power up
Remote ON/OFF
mS
30
Remote ON/OFF Control (See Page 27)
(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
PXA15-xxWSxx
3
Data Sheet
12 July, 2022
15W, Single Output
General Specification
Parameter
Efficiency(See Page 21)
(Vin = Vin(nom) ; Full Load ; TA=25 ºC)
Isolation Voltage
Input to Output
Isolation Resistance
Model
Min
Typ
24WS3P3
85
24WS05
87
24WS12
86
24WS15
86
48WS3P3
85
48WS05
87
48WS12
86
48WS15
86
All
All
Unit
%
2250
VDC
1
GΩ
Isolation Capacitance
All
Switching Frequency
XXWS3P3
350
XXWS05
350
XXWS12
400
Weight
Max
1000
pF
KHz
XXWS15
400
All
10.5
All
1.322×10
g
MTBF(See Page 32)
Bellcore TR-NWT-000332, TC=40 ºC
MIL-HDBK-217F
6
hours
5
5.147×10
PXA15-xxWSxx
4
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves
All test conditions are at 25 ºC. PXA15-24WS3P3
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
PXA15-xxWSxx
5
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS3P3
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
PXA15-xxWSxx
6
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS05
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
PXA15-xxWSxx
7
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS05
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
PXA15-xxWSxx
8
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS12
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
PXA15-xxWSxx
9
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS12
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
PXA15-xxWSxx
10
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS15
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
PXA15-xxWSxx
11
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-24WS15
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
PXA15-xxWSxx
12
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS3P3
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
PXA15-xxWSxx
13
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS3P3
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
PXA15-xxWSxx
14
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS05
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
PXA15-xxWSxx
15
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS05
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
PXA15-xxWSxx
16
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS12
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
PXA15-xxWSxx
17
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS12
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
PXA15-xxWSxx
18
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS15
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
PXA15-xxWSxx
19
Data Sheet
12 July, 2022
15W, Single Output
Characteristic Curves (Continued)
All test conditions are at 25 ºC. PXA15-48WS15
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
PXA15-xxWSxx
20
Data Sheet
12 July, 2022
15W, Single Output
Testing Configurations
Input reflected-ripple current measurement
Component
L
C
C
Value
12μH
220μF
33μF
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
100%
Vin I in
PXA15-xxWSxx
21
Data Sheet
12 July, 2022
15W, 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:
Component
Value
Voltage
L1
10μH
----
C1
C2 & C3
6.8μF
470pF
50V
3KV
Component
Value
Voltage
L1
18μH
----
C1
C2 & C3
2.2μF
470pF
100V
3KV
PXA15-24WSXX
Reference
2.6A 0.04Ω 0705 SMD Inductor
1812 MLCC
1808 MLCC
PXA15-48WSXX
Reference
1.6A 0.1Ω 0705 SMD Inductor
1812 MLCC
1808 MLCC
PXA15-xxWSxx
22
Data Sheet
12 July, 2022
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:
PXA15-24WSXX
Component
Value
C1
---C2, C3 & C4
6.8μF
C5 & C6
470pF
L1
145μH
L2
10μH
PXA15-48WSXX
Component
Value
C1
2.2μF
C2, C3 & C4
2.2μF
C5 & C6
470pF
L1
325μH
L2
33μH
Voltage
---50V
3KV
------Voltage
100V
100V
3KV
-------
Reference
---1812 MLCC
1808 MLCC
Common Choke
2.6A 0.04Ω 0705 SMD Inductor
Reference
1812 MLCC
1812 MLCC
1808 MLCC
Common Choke
1.2A 0.13Ω 0705 SMD Inductor
PXA15-xxWSxx
23
Data Sheet
12 July, 2022
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. Input external C-L-C filter is recommended to minimize input reflected ripple
current. The inductor is simulated source impedance of 12μH and the capacitor is Nippon chemi-con KZE series
220μF/100V&33μF/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 PXA15WS 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 enables 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.
PXA15-xxWSxx
24
Data Sheet
12 July, 2022
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
RU
Trim down equation
VO , down L G
RD
H
VO VO , down
RD
Trim constants
Module
G
H
K
L
PXA15-XXWS3P3
5110
2050
0.8
2.5
PXA15-XXWS05
5110
2050
2.5
2.5
PXA15-XXWS12
10000
5110
9.5
2.5
PXA15-XXWS15
10000
5110
12.5
2.5
TRIM TABLE
Trim up (%)
VOUT (Volts)=
RU (K Ohms)=
PXA15-XXWS3P3
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
PXA15-XXWS05
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
PXA15-XXWS12
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
Trim up (%)
1
2
5
6
7
8
9
10
10.800
PXA15-XXWS15
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
PXA15-xxWSxx
25
Data Sheet
12 July, 2022
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 120 ºC. When Operating, adequate cooling must be provided to maintain the test point
temperature at or below 120 ºC. Although the maximum point temperature of the power module is 120 ºC, maintaining
a lower operating temperature will increase the reliability of this device.
TOP VIEW
PXA15-xxWSxx
26
Data Sheet
12 July, 2022
15W, Single Output
Remote ON/OFF Control
The Remote ON/OFF Pin is used to 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 open collector transistor, FET, or Photo-Coupler. The switch
must be capable of sinking up to 1 mA at 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 PXA15WS module is turned off When PXA15WS module is turned on
at Low logic level
at High logic level
b. Negative logic – The DC/DC module is turned on when the ON/OFF pin is at low logic level. Ahigh logic level signal is
needed to turn off the device.
When PXA15WS module is turned on When PXA15WS module is turned off
at Low logic level
at High logic level
PXA15-xxWSxx
27
Data Sheet
12 July, 2022
15W, Single Output
Mechanical Data
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)
PIN CONNECTION
PIN
PXA15WS SERIES
1
2
3
4
5
6
+ INPUT
- INPUT
ON/OFF
+VOUT
TRIM
-VOUT
EXTERNAL OUTPUT TRIMMING
Output can be externally trimmed by using the
method shown below.
6
TRIM
RU
UP
OPTIONS
Suffix
Description
P
N
S
T
Positive Logic
Negative Logic
Surface Mount
Trim
5
TRIM
DOWN
4
RD
-NST or NT as standard
Delete suffix if not required
PXA15-xxWSxx
28
Data Sheet
12 July, 2022
15W, Single Output
Recommended Pad Layout
Recommended pad layout for DIP type
Recommended pad layout for SMD type
PXA15-xxWSxx
29
Data Sheet
12 July, 2022
15W, Single Output
Soldering and Reflow Considerations
Lead free wave solder profile for DIP type
Zone
Preheat zone
Actual heating
Reference Parameter.
Rise temp. speed: 3 ºC /sec max.
Preheat temp.100~130 ºC
Peak temp. :250~260 ºC
Peak time(T1+T2 time):4~6 sec
Lead free reflow profile for SMD type
Zone
Preheat zone
Actual heating
Cooling
Reference Parameter.
Rise temp. speed:1~3 ºC /sec
Preheat time:60~90sec
Preheat temp.155~185 ºC
Rise temp. speed:1~3℃/sec
Melting time:20~40 sec Melting temp:220 ºC
Peak temp. :230~240 ºC
Peak time:10~20 sec
Rise temp. speed: -1~-5 ºC /sec
PXA15-xxWSxx
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Data Sheet
12 July, 2022
15W, Single Output
Cleaning and Drying Considerations
Cleaning process
a. PWB cooling prior to cleaning:
Power modules and their associated application PWB assemblies should not be cleaned after
soldering until the power modules have had an opportunity to cool to within the cleaning solution
temperature. This will prevent vacuum absorption of the cleaning liquid into the module between the pins
and the potting during cooling.
b. Cleaning process:
In aqueous cleaning, it is preferred to have an in-line system consisting of several cleaning stages
(prewash, wash, rinse, final rinse, and drying). De-Ionized (DI) water is recommended for aqueous
cleaning; the minimum resistivity level is 1MΩ-cm. Tap-water quality varies per region in terms of
hardness, chloride, and solid contents; therefore, the use of tap water is not recommended for aqueous
cleaning. The total time of ultrasonic wave shall be less than 3 minutes.
Drying
After cleaning, dry converters at 100 ºC, more than 10minutes to assure that the moisture and other
potential foreign contaminants are driven out. For open power module construction having transformers
and inductors that have unspotted windings, a baking process of 100 ºC for 30 min. is recommended for
the assembly to ensure that the moisture and other potential foreign contaminants are driven out from the
open windings.
The drying section of the cleaning system should be equipped with blowers capable of generating
1000 cfm-1500 cfm of air so that the amount of rinse water left to be dried off with heat is minimal.
Handheld air guns are not recommended due to the variability and inconsistency of the operation.
Product Post-wash external appearance
The marking or date-code may fade or disappear after cleaning.
PXA15-xxWSxx
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Data Sheet
12 July, 2022
15W, Single Output
Part Number Structure
PXA 15 – 24W S 05 -A
Total Output power
15 Watt
Option Suffix
Input Voltage Range
24xxx : 9~36V
48xxx : 18~75V
Output Voltage
3P3 : 3.3V
05 : 5V
12: 12V
15: 15V
Single Output
Model
Number
Input
Range
Output
Voltage
(2)
Output Current
Full Load
Input Current
(1)
Full Load
Eff
(%)
4000mA
3000mA
1300mA
1000mA
4000mA
3000mA
1300mA
1000mA
680mA
754mA
793mA
763mA
340mA
377mA
397mA
382mA
85
87
86
86
85
87
86
86
PXA15-24WS3P3
9 - 36 VDC
3.3 VDC
PXA15-24WS05
9 - 36 VDC
5 VDC
PXA15-24WS12
9 - 36 VDC
12 VDC
PXA15-24WS15
9 - 36 VDC
15 VDC
PXA15-48WS3P3
18 - 75 VDC
3.3 VDC
PXA15-48WS05
18 - 75 VDC
5 VDC
PXA15-48WS12
18 - 75 VDC
12 VDC
PXA15-48WS15
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.
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 PXA15-24WSXX modules and 1.5A for
PXA15-48WSXX 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 PXA15WS 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 1.322×10 hours.
MIL-HDBK 217F NOTICE2 FULL LOAD, Operating Temperature at 25 . The resulting figure for MTBF is
5
5.147×10 hours.
PXA15-xxWSxx
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