Mmats M3000.1D

[imraneesa]

Hi all

Amp has two irs21844s. One IC has good oscillations other IC high side fets has waveform as attached. Fets are good. I tried replacing new IC also. Same problem.

 

[Perry Babin]

What terminal of what component was that taken from?

 

[imraneesa]

The wave form is from the gate of high side fet. Q11

 

[Perry Babin]

What does the input to the IC look like?

What does the low-side drive look like?

 

[imraneesa]

Here are the pictures of waveform of pin1 of IC

And gate of low side.

 

[Hexhclass]

what about the bad cap next to the output inductor

 

[imraneesa]

It was showing good value in both farads and esr. 22uf 100v. I only have 10uf 100v. I changed u15. Now it just played good. But I still have to monitor.