PAH350S48-28 TDK Corporation, PAH350S48-28 Datasheet - Page 80

• Manufacturer Part Number: PAH350S48-28
• Description: POWER SUPPLY: PAH35048-28
• Manufacturer: TDK Corporation

Specifications of PAH350S48-28

• Rohs Compliant: YES

PAH
B-222
（1）Output Derating by ambient temperature
PAH
input. Insulation resistance value is 100MΩ and above at
500VDC applied voltage. Make sure that during testing,
the isolation testers does not produce a high pulse when
the applied voltage is varied. Ensure that the tester is fully
discharged after the test.
1 Output Derating
There is no restriction on mounting direction but there
Fig. 1-2, 1-3, and 1-4 shows output derating vs ambient
temperature.
In this case, natural convection cooling means occurance
of 0.2m/s airflow due to self heating of the power mod-
ule. If the product is used out of derating curve, they shut
down by OTP (over temperature protection).
Please note that OTP cannnot operate correctly when
cooling is concentrated on thermal detector only
Output derating by ambient temperature
Vin=48VDC at standard vertical mounting
should be enough consideration for airflow so that
heat does not accumulate around the power module
vicinity. Determine external components configuration
and mounting direction on PCB such that air could
flow through power module at forced air cooling or
convection cooling. Take note, output power derating
is needed as shown in followings. The derating curves
provided is based on the below set-up condition.
200H
Fig.1-1 Output derating set-up condition
100MΩ and above at 500VDC
3. Mounting Method and Thermal Condition
Isolation tester
Top view
Airflow
Withstand
Voltage tester
500VDC
AC
C L
Fig.20-1 Isolated test
Ta and air velocity
measurement point
+Vin
CNT
−Vin
+Vin
CNT
−Vin
25.4mm
12.7mm
Airflow
PCB
TRM
TRM
-Vin
-Vin
-Vin
-Vin
+V
+V
+V
+V
-S
-S
-S
-S
PCB
Power
Module
（2）Output derating by PCB
 Vibration
Vibration of power module is defined in case of mounting
on PCB.
 Shock
Value for the conditions of out shipping and packing.
PAH200H48-1R8 (include /P, /V, /PV option)
PAH200H48-2R5 (include /P, /V, /PV option)
PAH200H48-3R3 (include /P, /V, /PV option)
PCB temperature is decided by temperature of ther-
When use with different measurement conditions from
output derating by ambient temperature, use output
derating by PCB temperature as in Fig.1-6.
mal sensor in below Fig.1-5. As the thermal sensor
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0
0
0
0
0
0
0
0
0
-40
-40
-40
-40
-40
-40
-40
-40
-40
Air Velocity
Air Velocity
Air Velocity
Air Velocity
Air Velocity
Air Velocity
Air Velocity
Air Velocity
Air Velocity
-20
-20
-20
-20
-20
-20
-20
-20
-20
natural convection cooling
natural convection cooling
1m/s
1m/s
2m/s
2m/s
natural convection cooling
1m/s
2m/s
natural convection cooling
natural convection cooling
1m/s
1m/s
2m/s
2m/s
natural convection cooling
1m/s
2m/s
natural convection cooling
natural convection cooling
1m/s
1m/s
2m/s
2m/s
natural convection cooling
1m/s
2m/s
・All specifications are subject to change without notice.
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0
0
0
0
0
0
0
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Ambient Temperature (℃)
Fig.1-2
Fig.1-3
Fig.1-4
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