Came in with blown power supply. Replaced PS fets, gate resistors and ucc27524 driver.
When I apply power, no remote, the ucc27524 shorts its outputs(pins 5 & 7) to ground with 5.4 ohms resistance. This also happens with the fets removed. I tried another ucc27524 and no change. Parts are from mouser and work in another amp I have here with the same driver(stetsom ex6000eq).
With the ucc27524 removed I can see drive signal on both input pins(2 & 4). I get 12volts on the vdd (pin 6) and ground on pin 3.
After a few minutes disconnected from power the short goes away.
I am at a loss.
When I apply power, no remote, the ucc27524 shorts its outputs(pins 5 & 7) to ground with 5.4 ohms resistance. This also happens with the fets removed. I tried another ucc27524 and no change. Parts are from mouser and work in another amp I have here with the same driver(stetsom ex6000eq).
With the ucc27524 removed I can see drive signal on both input pins(2 & 4). I get 12volts on the vdd (pin 6) and ground on pin 3.
After a few minutes disconnected from power the short goes away.
I am at a loss.
When the output reads 5.4 ohms to ground, do you read 0v from the input to ground?
You read 5.4 ohms to ground with your meter. Is there no waveform on the output pins of the IC when you have a square wave input?
You read 5.4 ohms to ground with your meter. Is there no waveform on the output pins of the IC when you have a square wave input?
I get 1k from input to ground.
There is a waveform on the output and it tries to drive the fets but maxes out my ps (10amps) and the fets immediately start to get very hot. They are dumping the 10amps to ground through the 5.4 ohms.
There is a waveform on the output and it tries to drive the fets but maxes out my ps (10amps) and the fets immediately start to get very hot. They are dumping the 10amps to ground through the 5.4 ohms.
