Anyone know what outputs and driver ic’s go in this amp ?
I received the amp and someone has been inside it and the outputs and driver ic’s are missing
I received the amp and someone has been inside it and the outputs and driver ic’s are missing
What gate resistors are they using with the PS FETs?
What microcontroller are they using?
Photo of the PS drive and control circuit?
What microcontroller are they using?
Photo of the PS drive and control circuit?
It’s marked IR4427 on the board to throw people off . The power supply driver ic is the one that’s missing in the pic but it’s not an ir4427
Yes the mislabeled the other ic’s as well and the drivers ic’s for the outputs are scratched off .
Leg 1 of the driver ic in question is directly connected to the power supply fet gate legs /gate resistors also leg 3 is connected to the other half of the power supply fets gate leg .
So leg 1 is connected to half the power supply fets and leg 3 is connected to the other half of the fets
Leg 1 of the driver ic in question is directly connected to the power supply fet gate legs /gate resistors also leg 3 is connected to the other half of the power supply fets gate leg .
So leg 1 is connected to half the power supply fets and leg 3 is connected to the other half of the fets
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Are you sure that leg 1 is tied to the gate of the FETs?
It appears that pins 1, 6 and 8 are tied together. Isn't pin 6 tied to B+ or 15v via the 10 ohm resistor?
It appears that pins 1, 6 and 8 are tied together. Isn't pin 6 tied to B+ or 15v via the 10 ohm resistor?
My mistake pins 5,7 are tied to the gate of the fets . Pin 6 is tied to B+ through the 10 ohm resistor
They use UCC27524DSDR for power supply driver and also output buffers.
The drivers are IRS20957.
The outputs are RAIL DEPENDENT....if not reach 150v, IRFB4115 IS OK, otherwise IRFB4127, also depend on the impedance version, 1 or 2 ohm.
The drivers are IRS20957.
The outputs are RAIL DEPENDENT....if not reach 150v, IRFB4115 IS OK, otherwise IRFB4127, also depend on the impedance version, 1 or 2 ohm.