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TPA2031D1EVM: output abnormal with 100nF direct output capacitor

Will Wang47
Expert 7900 points
Part Number: TPA2031D1EVM
Other Parts Discussed in Thread: TPA2031D1

Hi team,

Customer is using TPA2031D1 in their project, and the following is their schematic, they find there is no output; after remove the output cap AC5, AC6, AC7, the output comes to be normal, could you help explain why there is no output when with caps?

Thanks and best regards,

Will

  • 0
    TI__Guru* 84915 points

    Hi, Will,

    These output capacitors must be used with an additional inductor or ferrite bead replacing the 0-ohms resistors (AR4 and AR5). Otherwise, if the output capacitors are only used, it will result in over-current events. Placing the device in a protected state.

    Best regards,
    Luis Fernando Rodríguez S.