Using Si8751 for High power DC SSR on
Isolation Forum - Isolator
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1. I would like to know if Si8751 is suitable to drive large FET (IRFP7718) with gate charge of 552nC and CiSS = 29550 pF . ( as in the data sheet the gate capacitance is assumed to be 100pF_).
2. The switching frequency of the load is slow at 1Hz. The load is a 20,000uF capacitor . The Supply voltage is a 48v battery. will this cause stress on the FET ? as it will see the load as short circuit and stay in linear region for app 10ms ( my calculations for TT connected to GND)
3. I will use a 100pF capacitor from MCAP1 to FET Drain for miller clamp . Any comment on making circuit more robust and reliable ?
Oct 27 2020, 11:54 AM