Hi all, I'm at a stalemate with an American Bass VFL 20k Competition series. I replaced several damaged components including 20N50F output mosfet, TC4452 gate driver, IR2184 Half Bridge driver but still the amp won't work.
I believe that the problem revolves around the IR2184 driver and its reference power supplies on pins 5 and 8. In fact, during the start-up phase, the 12v referred to the negative rail is fixed on pin 5; while on pin 8 the 12v referred to gnd are missing after a few seconds. In this condition pin 4 (low side output) seems to work properly while pin 7 (High Side output) does not work. This situation puts the amp in protection mode and the power supply switches off. I checked everything, but something still escapes me .... do you have any suggestions???? Thank you for what you are going to do, greetings.
Andrea.
I believe that the problem revolves around the IR2184 driver and its reference power supplies on pins 5 and 8. In fact, during the start-up phase, the 12v referred to the negative rail is fixed on pin 5; while on pin 8 the 12v referred to gnd are missing after a few seconds. In this condition pin 4 (low side output) seems to work properly while pin 7 (High Side output) does not work. This situation puts the amp in protection mode and the power supply switches off. I checked everything, but something still escapes me .... do you have any suggestions???? Thank you for what you are going to do, greetings.
Andrea.