PAH50S48-2.5 TDK Corporation, PAH50S48-2.5 Datasheet - Page 39

• Manufacturer Part Number: PAH50S48-2.5
• Manufacturer: TDK Corporation

・All specifications are subject to change without notice.
PAH
 Isolation Resistance
Use DC isolation tester (MAX 500V) between output and
baseplate. Isolation resistance value is 100MΩ and above
at 500VDC applied voltage. Also take note that depending
on the isolation tester used, some testers generate high
voltage pulse. Discharge the power module after test using
a resistor, etc.
Verify following items before concluding power module
damage.
1） No output voltage
2） Output voltage is high
● Is specified input voltage applied?
● Are the ON/OFF control terminal (CNT), remote
● For cases where output voltage adjustment is used,
● Are there no abnormalities in the output load used?
● Is the baseplate temperature within the specified
● Are the remote sensing terminals (+S, -S) correctly
● Is the measurement done at the sensing points?
● For cases where output voltage adjustment is used,
sensing terminal (+S, -S), output voltage trimming
terminal (TRM) correctly connected?
is the resistor or variable resistor setting, connec-
tions correctly done?
temperature range?
connected?
is the resistor or volume setting, connections cor-
rectly done?
300S24, 350S24
3. Before concluding power module damage
DC Isolation Tester
Over 100MΩ at 500VDC
Fig.20-1 Isolation Test
＋Vin
CNT
CASE
−Vin
TRM
＋V
−V
＋S
−S
 Vibration
Vibration of power module is defined in case of mounting
on printed circuit board.
 Shock
Withstand shock value is defined to be the value at Den-
sei -Lambda shipment and packaging conditions.
 Others
Please refer to "Power Module Application Note" for ther-
mal design and mounting direction.
3） Output voltage is low
4） Load regulation and line regulation is large
5） Output ripple voltage is large
● Is specified input voltage applied?
● Are the remote sensing terminals (+S, -S) correctly
● Is the measurement done at the sensing points?
● For cases where output voltage adjustment is used,
● Are there no abnormalities in the output load used?
● Is specified input voltage applied?
● Are the input terminals and the output terminals
● Is the measurement done at the sensing points?
● Is the input or output wire too thin?
● Is the measuring method used the same or equiva-
● Is the input ripple voltage value within the specified
connected?
is the resistor or variable resistor setting, connec-
tions correctly done?
firmly connected?
lent with the specified method in the Application
Notes?
value?
B-181
PAH