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BQ25790: BQ25790 OTG function

Part Number: BQ25790

Tool/software:

I would like to know how to enable the OTG function without a OTG device insert? And if it can, what happens when a charger attach to Vin and the OTG is turn on at this time?

  • Hi Haiyang,

    Reverse/OTG mode can only be enabled via I2C write to REG0x12[6] (and ACDRVx in REG0x13[7:6} if input MUX FETs used).  The IC has no way to know if an adapter with voltage <= OTG-OVP threshold is plugged in.  So, it will stay in OTG mode and provide power back to the adapter.

    Regards,

    Jeff