BQ25619: INT low pulse when VBUS plug in

Will Wang47

Part Number: BQ25619

Hi team,

According to our datasheet, there should be 2 INT low pulses, 1st is from poor source qualification; 2nd is input source type detection. Does my understanding correct? I only find 1 pulse after VBUS plugged in, could you help check about this?

Thanks and Best Regards,

Will

over 4 years ago

0 Ning T over 4 years ago

TI__Guru 57681 points

Will,

Please use a separate power supply (available before VBUS powers up) as the INT pin pull-up and try again.

Thanks,

Ning.

0 Will Wang47 over 4 years ago in reply to Ning T

TI__Expert 7710 points

Hi Ning,

Before VBUS powers up, VBAT serve as the pull-up voltage. We should see 2 pulses, correct? Could you help verify on EVM?

Thanks,

Will

0 Ning T over 4 years ago in reply to Will Wang47

TI__Guru 57681 points

Will,

Could you please provide the VBUS (voltage at VBUS pin), REGN, INT, VBAT waveforms for the whole power-up process? There should be two INT pulses.

Thanks,

Ning.

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BQ25619: INT low pulse when VBUS plug in