TDK-Lambda PH-A280 Series Instruction Manual - Tdk-Lambda
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TDK-Lambda
PH-A280 Series
INSTRUCTION MANUAL
Withstand Voltage Testing with External Application
The above Withstand Voltage Testing specification applies only to power supply as stand–alone unit. Please take
note of the following points when Withstand Voltage Testing is performed with attached external application.
For applications that require capacitor connections between input to FG and output to FG as shown in the
Fig. 6-21, if the total capacitance value of C2, C5 is 4,200pF or more, must be set capacitor to between output
and FG according to the below formula in order to satisfy 3kVAC Withstand Voltage test between Input
terminal and Output terminal.
If the formula below is not satisfied, power supply might be damaged
.
Formula for calculating total capacitance between Output terminal and FG terminal
(C6+C7) > 5×(C2+C5)-21250 [pF]
Fig.6-21 Example of connecting external application
6-21. Isolation Resistance
Use DC isolation tester (MAX 500V) between output and base-plate. Isolation resistance value is 100MΩ and
above at 500VDC applied voltage. Make sure that during testing, the isolation testers do not generate a high pulse
when the applied voltage is varied.
Ensure that the tester is fully discharged after the test.
Over 100MΩ at 500VDC
Fig.6-22 Isolation Resistance Test
6-22.
Vibration
Vibration of power supply is defined when mounted on printed circuit board.
For details, refer to “7. Mounting Method”.
6-23. Shock
Withstand shock value is defined to be the value at TDK -Lambda shipment and packaging conditions, or when
mounted on printed circuit board.
When mounting on printed circuit board, refer to “7. Mounting Method”.