And, now you are at it:
Supply voltages?
Speaker impedance?
I have chokes (35A rating) with a core looking somewhat similar (yellow/greenish). They are absolutely unsuited for output filters due to core losses.
I guess "4K5 watt" means an amplifier that is supposed to deliver 4500W. Then it is no surprise if the power-FETs are stressed.
My impression is that with IRS2110 you cannot increase the dead-time further?
Supply voltages?
Speaker impedance?
I have chokes (35A rating) with a core looking somewhat similar (yellow/greenish). They are absolutely unsuited for output filters due to core losses.
I guess "4K5 watt" means an amplifier that is supposed to deliver 4500W. Then it is no surprise if the power-FETs are stressed.
My impression is that with IRS2110 you cannot increase the dead-time further?
IRS2110 doesn't have internal dead-time, it has independent high/low inputs, so that would need to be taken care of "upstream" of it.
You can use a diode across gate resistor to discharge mosfet gate quicker than it is charged up for more deadtime.
A very logical solution.
But, if you are dealing with a 4500W amplifier and your shoot-through's, choke losses, parasitic oscillations etc. are excessive it is not so simple as with lower power amplifiers where we can compensate a little for less optimized operation. Excessive heating may indicate other high level stress.
Ultra power amplifiers just multiply grossly the problems we know how to counter in amplifiers up to a couple of hundred watts.
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4500W recommended --> Class D with efficiency of 90% = 10% loss = 450W heat = heatsink...class A size of heat sink or a lot of strong fans !
4k5w ???? Where are the measurements?
Ask your guru to help you out in this case as well.
The PCB looks like a cheap Class-B amp redention.
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