The well working one uses two k3595 mosfets
The less working one uses two irfb31n20d
Could decreasing the switching frequency via the potentiometer reduce pressure on mosfets and stop it from going into protect?
Or replacing the mosfets with a better pair?
The less working one uses two irfb31n20d
Could decreasing the switching frequency via the potentiometer reduce pressure on mosfets and stop it from going into protect?
Or replacing the mosfets with a better pair?
Found the circuit diagram for the irs2092s on my amp module.
Found an issue so far that resistor r7 on my board is 100ohm, not 3k.
I'm guessing this has been effecting the switching frequency
Replaced the 100ohm with 3k, and the cutting out issue at high volume has been fixed.
However, the amplifier isn't as loud as before anymore.
I'm going to play around with resistor values in the range 100ohm to 3k, and see which ones still allow for the highest volume with no cutting out.
However, the amplifier isn't as loud as before anymore.
I'm going to play around with resistor values in the range 100ohm to 3k, and see which ones still allow for the highest volume with no cutting out.
You could try replacing R24 and R25 with 10R resistors.
This will double dis/charge rate, providing 2092 can keep up of course.
When I used IRFB4227's I used gate driver IC's.
I suspect changing frequency wont help because its the edges of signal that affect over current detect.
I've found the perfect resistor value on r7 where there is no cutting out but high volume to be 1.3k.
Replaced r24 and r25 10r also improves it further, its working very nicely now
Replaced r24 and r25 10r also improves it further, its working very nicely now