Spl Dynamics D5s big current problem and blow

[drtapfesz]

Welcome! There is a spl dynamics D5s amplifier.
The output stage is one of the four pop

I changed the all IR21844 . There is a PWM signal at the FET gate, but the quiescent current of 13A and rising. What could be the problem?

Thanks in advance!

 

[JonSnell Electronic]

If the output FETS are not switched off fast enough or the base frequency is too high, both High and Low output will be switched on at the same time.

 

[drtapfesz]

I use Irfp360lc if insert 1-1 piece all stage, current stable.