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BQ25792: How to direct to modified the ICHG in BQ25792

Jimmy Lai
Expert 6845 points
Part Number: BQ25792
Other Parts Discussed in Thread: TPS25750

Dear Team,

We want to modify the BQ25792 REG3 ICHG directly to limit the charging current.

However, I cannot change this register.

We connected the host soc I2C bus to BQ25792 , so both the host soc and PD TPS25750 can control the BQ25792.

 

I successfully changed the other register values, but cannot change the ICHG.

Have any idea how to modify the ICHG, if we want to dynamically change the ICHG. 

Many Thanks,

Jimmy

  • 0
    TI__Mastermind 40635 points

    Dear Jimmy,

    Can you please describe the exact bytes you are sending to the charger? For multi-byte registers you need to write the upper byte first followed by the lower byte.

    For example, if you wanted to change the charge current to 1400 mA, you would write the register address with write configuration, then 0x03, 0x00, and 0x8C.

    Thanks,

    Mike Emanuel

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