Hi,
The amplifier turns on correctly and there is audio on the output. but without load increasing the volume increases the input current from 1 to 4 amps. sometimes it goes into protection.
No shorted or leaky mosfets at source like output stage, all transistors on sub pcb board were replaced. I have noticed that when using an exact 12v source, the voltage on the secondary of the source is 63V symmetrical. Connected in the car to 13.5v the voltage in the secondary changes to 71v symmetrical. with 13.5v the transistors on the sub pcb (MOSFET driver) get too hot (Q111, Q116 and Q118). the switching frequency on the source mosfets remains constant with both input voltages.
The source controller is an IC SG3525AP. I don't know if that behavior in the source is correct.
The schematic
any suggestions?
Note: the diagram corresponds to the mosfet controller, sorry if I made a mistake when passing it.
The amplifier turns on correctly and there is audio on the output. but without load increasing the volume increases the input current from 1 to 4 amps. sometimes it goes into protection.
No shorted or leaky mosfets at source like output stage, all transistors on sub pcb board were replaced. I have noticed that when using an exact 12v source, the voltage on the secondary of the source is 63V symmetrical. Connected in the car to 13.5v the voltage in the secondary changes to 71v symmetrical. with 13.5v the transistors on the sub pcb (MOSFET driver) get too hot (Q111, Q116 and Q118). the switching frequency on the source mosfets remains constant with both input voltages.
The source controller is an IC SG3525AP. I don't know if that behavior in the source is correct.
The schematic
any suggestions?
Note: the diagram corresponds to the mosfet controller, sorry if I made a mistake when passing it.
