Guru
Joined: 02/02/2017
Location: AustraliaPosts: 1471
| Posted: 03:20am 09 Feb 2026 |
for reference, here is Wiseguy's gate voltages under the two tests
200 W and 1300 W AC output.
first is 200W:
and
I see the low side gate is being yanked up as the high side switches on.
not too much no doubt.
and for 1300 W output I saw this:
and
clearly the low side FET gate is being pulled high enough
to make it switch on while the high side FET is switching on.
this is shoot through.
overall the voltages seem better controlled than my 1 FET board as seen above.
I probed the gate voltages using the isolated probe and one non-isolated probe
which was on the low side FET's gate.
