They make that statement because this class of ICs (FET gate drivers) are especially prone to latch-up. Just because it is resistant doesn't mean it cannot happen. You still need to make sure that you don't subject the IC to any disallowed conditions as specified in the datasheet. Sean On Sat, Apr 6, 2013 at 8:42 PM, veegee wrote: > On 2013-04-06 8:15 PM, Bob Blick wrote: > > It could be latchup, which is when the parasitic SCR that many IC's > > contain gets triggered. This usually happens if the IC has a signal on > > an input pin before(and during) power is applied. It can also (rarely) > > happen if an input is floating. > > > > Capacitance from an output to ground can cause oscillation, that would > > be my number 2 guess. > > > > I suspected latchup as well. The funny thing is, the MOSFET driver IC > I'm using (TC427) claims to be latchup resistant. > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .