I recently bought an amplifier from AliExpress based on TPA 3255 chip. Board had a single power supply requirement of 48v dc. But my switch mode power supply had 51v dc out put. Amp worked without any problem the first day. Both clip and fault leds were lit during operation , which was normal as per the supplier. However the second day upon powering it up I noticed the fault led was off and the clip led was on as usual. But amp was not working. Upon contacting the supplier he maintained that due to higher voltage than 48 v would have destroyed the IC. Is it possible ? Since the max voltage for TPA 3255 is 53.5 v.dc. Does the ic have any protection against high voltage? How can I check the ic to ensure it’s faulty?
Your support is very much appreciated,
Also where can I buy an replacement TPA 3255?
Thanks in advance
Rasika