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TAS5630: Even without a input signal it runs really hot.

Part Number: TAS5630

I am using the TSA5630 in ptbl mode with a subwoofer. I am using a 48 volt battery which runs at 53volts max. I completely unpluged the input signal but it still runs hot to the touch. And with a small input signal it wil overheat and turn off. I am using a multimeter and it says its pulling 0,22 ampere without any input. I do have a heatsink installed