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BQ76907-Q1: how to trigger VC0 or TS when supercapacitor is dead?

Josh Wei
Prodigy 10 points
Part Number: BQ76907-Q1
Other Parts Discussed in Thread: TIDA-010268, BQ76907

Hi team,

Could you help to share how to trigger rising edge to VC0 or TS to wake BQ76907-Q1 from shundowm mode when super capacitor is dead?

When there is no energy in 5s supercapacitors, DSG/CHG are controlling Back-to-back MOSFETS in off state. In this scenario, how to generate a rising edge trigger?

Supercapacitor itself energy can't be ultilized in this condition. as said TIDA-010268 Schematic isn't workable.

Thank you!

Josh

  • 0
    TI__Mastermind 30525 points

    Hello, we have received your case and the investigation will take some time. Thank you for your patience.

  • +1
    TI__Mastermind 41505 points

    您好

    您在那里分享的原理图没有显示TS或VC1引脚周围的唤醒电路。您可以参考BQ76907 EVM用户指南或您引用的TIDA设计，以获取唤醒电路的示例。代替使用1P，它可以连接到另一个输入端，在TS引脚上提供所需的电压。

    Josh Wei 说：

    Could you help to share how to trigger rising edge to VC0 or TS to wake BQ76907-Q1 from shundowm mode when super capacitor is dead?

    When there is no energy in 5s supercapacitors, DSG/CHG are controlling Back-to-back MOSFETS in off state. In this scenario, how to generate a rising edge trigger?

    当你说超级电容器已经死了，我对这个问题有点困惑。如果超级电容器没电了，设备将如何通电？该设备是否会向BAT引脚提供任何电压？