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TPA3110D2: Absolute Maximum Ratings of Interface pins

Takao Yamamoto
Genius 4135 points
Part Number: TPA3110D2

Dear all,

This device has Vcc+0.3V absolute maximum rating on interface pin(/SD, GAIN0, GAIN1, PBTL, /FAULT).

By the way, could you teach me about the mean of 'Vcc'?

Which is 'Vcc' = PVCC or AVCC?

[Back ground]

If Vcc = AVCC, AVCC pin voltage will decrease to some vlotage because of resistor (=10Ω) between AVCC power and AVCC pin.

In other words, we think that interface pin voltage rating will decrease by AVCC drop.

Is this correct?

Best regards,

  • 0
    TI__Mastermind 24835 points

    Hi Yamamoto-san,

    Thank you for asking question in E2E. And sorry for the confusion.

    In the description of absolute maximum rating on interface pin(/SD, GAIN0, GAIN1, PBTL, /FAULT), Vcc is PVCC voltage. The ressistance between PVCC and AVCC is used to keep class-D noise from entering the input amplifiers. The resistance value is small and the current through is also small, then the voltage drop on the resistance is small. So AVCC is less than PVCC, but very close to PVCC.

    Best regards,

    Shawn Zheng