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TPA3110D2: Input voltage protection

Part Number: TPA3110D2
Hello,

Could you show me the input voltage protection structure inside the TPA3110D2PWRR? Is there zener diodes to prevent an overvoltage inside? My customer wants to know it because of the following background.

My customer trying to destroy the IC by overvoltage from an external power supply in order to figure out the fault condition because the overvoltage issue is happened in their manufacturing process. They increased the PVCC voltage by an external power supply gradually, and the IC stopped the operation at the PVCC ~26V. After that the IC was not destroyed even though the PVCC voltage was increased up to 37V.

Best Regards,
Kazuto Tatsumi