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CDM resistance calculation

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saha.123

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Hi

What is the range of resistance will be kept for Rcdm resistor.HOw its calculated from CDM voltage like 200V??

Thanks in advance. Screenshot-17.png
 

1. the outside HBM diodes must be able to stand several CDM voltage pulses
2. the inner CDM diodes must be able to stand the limited current due to the CDM voltage spikes.
If you know which current they can stand, you can calculate Rcdm.

Usually it's in the order of 100..200Ω.
 

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