Have this amp in, amp works perfectly with input voltage up to 13.2v after 13.2 the audio is muted. The amp remains on and power supply still supplies + and - 80v
With the black probe on the negative rail, is the voltage on the SD terminal of the IC switching/changing when it goes mute?
Do you lose rail-rail oscillation when it goes mute?
Do you lose rail-rail oscillation when it goes mute?
Black probe on negative I get -136v on SD which increases to -144v when it mutes I also lose rail to rail oscillation
The black probe wasn't on the negative rail.
It appears to be going into protect. Is the protect LED lighting up?
Does the protect LED light up when you initially power the amp up.
It appears to be going into protect. Is the protect LED lighting up?
Does the protect LED light up when you initially power the amp up.
Sorry my bad had black probe on positive rail, black probe on negative I get 0.6v on SD that doesn't change when it mutes. Amp powers up red protect led then goes to green. when the input voltage goes over 13.2 the power supply remains on and producing rail volatges, the green light remains on it just loses output and rail to rail oscillation above 13.2v
Reduce the input Voltage back to 13.2 or below, rail to rail oscillation starts again and amp produces audio
Reduce the input Voltage back to 13.2 or below, rail to rail oscillation starts again and amp produces audio
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At first I though overvoltage protection on the power supply, but it only loses audio at higher voltage, power supply still switching and producing rail volatges