Hello, i just had a problem with a TPA3116 amplifier that worked fine for 2.5 years... Then, few days ago, it failed in a weird way:
The bluetooth chip in that board blew to smithereens for no apparent reason. I was not using it though, i bypassed it because it was garbage. The external (much much better) bluetooth module is intact. But the TPA3116 is NOT intact...
There is no output. No output at all. The chip is in SHUTDOWN mode, and i cant wake it up and make it work like before. The only way is to pull the SHUTDOWN pin high with a resistor to VCC. But it is sketchy to do and that resistor would block the heatsink over the Tpa3116.
Can someone help me figuring out what actually happened? The fried Bluetooth chip was on its own, i dont even know how it managed to damage the TPA3116...
The mute pin is LOW, so the outputs should be enabled... But the FAULTZ pin is LOW, which means it is in FAULT mode. But by doing that trick with the resistor, the FAULT mode goes away and the outputs are enabled. Disconnecting that resistor puts everything in FAULT mode again.
Before, it worked fine... Is the chip partially damaged? Maybe if i replace it the problem goes away?
The bluetooth chip in that board blew to smithereens for no apparent reason. I was not using it though, i bypassed it because it was garbage. The external (much much better) bluetooth module is intact. But the TPA3116 is NOT intact...
There is no output. No output at all. The chip is in SHUTDOWN mode, and i cant wake it up and make it work like before. The only way is to pull the SHUTDOWN pin high with a resistor to VCC. But it is sketchy to do and that resistor would block the heatsink over the Tpa3116.
Can someone help me figuring out what actually happened? The fried Bluetooth chip was on its own, i dont even know how it managed to damage the TPA3116...
The mute pin is LOW, so the outputs should be enabled... But the FAULTZ pin is LOW, which means it is in FAULT mode. But by doing that trick with the resistor, the FAULT mode goes away and the outputs are enabled. Disconnecting that resistor puts everything in FAULT mode again.
Before, it worked fine... Is the chip partially damaged? Maybe if i replace it the problem goes away?