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BQ25713B: Faults of ChargerStatus(20h) register

Part Number: BQ25713B

Hello team, I have some questions about the faults of ChargerStatus(20h) register:

1. "The faults are latched until a read from host" Let's say a ACOV fault occured, namely the VBUS voltage is greater than 24 (typ. 26V according to INPUT OVER-VOLTAGE COMPARATOR (ACOVP) information). "Fault ACOV" bit in the ChargerStatus register is set (value is "1"). I read the ChargerStatus register through I2C. Does it mean that after I have read the register this bit becomes "0" even though the voltage on VBUS is still greater than 24V (still in ACOV fault)? How am I going to know that VBUS voltage returned to normal (no fault voltage) if this bit is zero after I read the register?

2. SYSOVP_STAT: " After the SYSOVP is removed, the user must write a 0 to this bit or unplug the adapter to clear the SYSOVP condition to enable the converter again." How do I detect the SYSOVP is removed? Does it mean that after SYSOVP_STAT bit becomes 1, once the SYSOVP bit becomes 0, I have to reset it to enable the converter again?

  • Hi Di,

    Here are some comments on your questions. The best way to understand faults is to play with an EVM, because condition varies case by case and event sequence matters.

    1. No, if device is still in ACOV, you won't be able to clear the fault.

    2. Yes, host has to reset it to 0. This is for user's protection, to make sure it's now safe to turn on charger again.

    Best Regards,

    Linhong