skywalker898
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Hi we are designing a totem pole pulsed power supply and a question has come up about overcurrent situations.
We have a floating power supply, 12VDC connected to a 10uF capacitor. This is isolated from ground and the power supply and capacitor float with respect to the high voltage output (going from -300V to +500V square wave pulses at 25us). We are getting overcurrent hiccup protection coming on after a certain number of pulses, and I'm wondering if it is due to the common mode voltage change on the 10uF capacitor. If both leads of a floating capacitor change voltage from -300V to 500V, doesn't charge have to be flowing in this capacitor so that effectively we are charging the capacitor up over and over again?
Basically, what current flows when a floating capacitor has common mode voltage changes?
Thanks,
Brandon
We have a floating power supply, 12VDC connected to a 10uF capacitor. This is isolated from ground and the power supply and capacitor float with respect to the high voltage output (going from -300V to +500V square wave pulses at 25us). We are getting overcurrent hiccup protection coming on after a certain number of pulses, and I'm wondering if it is due to the common mode voltage change on the 10uF capacitor. If both leads of a floating capacitor change voltage from -300V to 500V, doesn't charge have to be flowing in this capacitor so that effectively we are charging the capacitor up over and over again?
Basically, what current flows when a floating capacitor has common mode voltage changes?
Thanks,
Brandon