They don't? I guess I'm not using "modern" NFETs then ... :(
Or are you just gonna rely on the body diode?
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2 months ago
Re: relay switching circuit
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2 months ago
Body diode doesn’t come into play. Some modern fets have published avalanche energy ratings, so exceeding Vbvds can be permitted.
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2 months ago
Even when fets are specified for avalanche energy, there is seldom a hint of what the avalanche voltage might be.
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2 months ago
I don't mind helping beginners. Their questions sometimes evoke interesting issues.
My pcb designer thinks he can route out 134 available balls of our FPGA, and I think I can drive all those relays with just one sot23 fet under each relay.
We'll selective-solder the thru-hole relay pins and the solder nozzle will just barely not desolder the fet.