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Original question:

BQ76952EVM: Questions Regarding BQ76952EVM Behavior During Sleep Mode and Protection Recovery

BQ76952EVM: Questions Regarding BQ76952EVM Behavior During Sleep Mode

joy zhou1
Intellectual 530 points
Part Number: BQ76952EVM
Other Parts Discussed in Thread: BQ76952

Tool/software:

Hi Alexis,

Following up on my last post — regarding the first question: on the EVM circuit board, the Precharge function is disabled by default. I followed the instructions and configured the DCHG/DDSG pins to 0xB2, but the function still isn’t working.

Could you please advise further?

BQ76952EVM: Questions Regarding BQ76952EVM Behavior During Sleep Mode and Protection Recovery - Power management forum - Power management - TI E2E support forums

Best regards,

Joy

  • 0
    Intellectual 530 points

    Hi TI team,

    Do you have any further suggestions?

    I measured the TP33 (PACK pin), and when a charger is plugged in, it does receive a high voltage jump. Could you please clarify: if the CHG FET is set to OFF during sleep mode and the precharge function is disabled, why does the BQ76952 not turn on the CHG FET when a charger is connected during sleep mode?

    Looking forward to your advice.

    Best regards,

    Joy

  • 0 in reply to joy zhou1
    Intellectual 530 points

    Hi TI team,

    After configuring the Sleep Charger Voltage Threshold to an appropriate value, it is working now.

    Best regards,

    Joy