I have some questions on ESD tests performed when device connected with power and not and searching for help here. I am asking this question because I think ESD can go into the power through TVS diodes, if the device is powered.
- It seems that most ESD tests are performed when device is powered(connected with power). Am I correct?
- For same ESD, will the harm be same to the device when connected with power and when not connected with power?
- If the board is not powered, for a single ESD shock, the ESD protection designs shall be still effective. Especially if there are power planes, since the planes can absorb charges. Am I correct?
- If the board is not powered, for accumulated ESD shocks, will ESD protection designs(schottky diodes, TVS diodes and etc.) still be effective? The charge will accumulate on the power lines.