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Noob here. I did a dumb thing few days ago that destroyed my TPA3110 amplifier board which is running on 24V 15A Lithium battery pack with BMS.

I placed a 35V 4700uF capacitor across the 24V output of the BMS while the amplifier is running then immediately amplifier stopped giving sound output. And also the IC is not heating up.

This question is not on fixing the amplifier but why did it stop working after this incident?

Here's the amp:

TPA3110 based amplifier

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  • \$\begingroup\$ What do you mean by "placed a 35V 4700uF capacitor"? Did you connect it across an output (between L+ and L- for example), or across the battery input (between GND and VCC) or something else? Was it being fed with an audio input signal at the moment you connected the capacitor? \$\endgroup\$
    – Simon Fitch
    Commented Aug 11, 2023 at 10:20
  • \$\begingroup\$ Oh sorry, I connected the capacitor in parallel to 24V output of the BMS. \$\endgroup\$
    – Warriorrev6300
    Commented Aug 11, 2023 at 10:51
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    \$\begingroup\$ Hopefully you just sinked the voltage rail below undervoltage lockout of the amplifier when the surge current into the capacitor caused voltage drop and/or tripped your BMS. \$\endgroup\$
    – winny
    Commented Aug 11, 2023 at 11:00
  • \$\begingroup\$ The BMS had no issues after that but the amplifier didn't work. \$\endgroup\$
    – Warriorrev6300
    Commented Aug 11, 2023 at 11:03
  • \$\begingroup\$ Have you tried with a different power supply? \$\endgroup\$
    – Rohat Kılıç
    Commented Aug 11, 2023 at 11:05

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