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BQ24133: BQ24133 Q1,Q2 broken

Part Number: BQ24133

Hi

My customer design with BQ24133, and find the MOS CSD17313Q2 is often damaged, the maximum charging current is 1.6A.

The adapter input voltage 12V.

Please give some suggestion.

Thanks

Star

  • Hi Star,

    How are the FETs damaged, across S-D or from G to S or D?  Does the output of the ACDRV charge pump have overshoot?  If the current limiting 4.02k resistors and soft start capacitors, I doubt the charge pump has enough power to overvoltage the gates of the FETs. 

    Regards,

    Jeff