But doesn't the worst-case VOL of the 595 at 0.33V turn the FET off ?Nope- with Vd = 12 Volts, the gate still sees 7 volts when the IO pin is HIGH- you cannot turn it off.
It's a PFET with the source connected to 12V, setting the output low makes Vgs = 12 V - even more ON than before!But doesn't the worst-case VOL of the 595 at 0.33V turn the FET off ?
So basically I just "got away with it" on the older project with VD at 6V ?It's a PFET with the source connected to 12V, setting the output low makes Vgs = 12 V - even more ON than before!