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BQ2057C: Heating issues in BQ2057W

Sankar Karuppannan
Prodigy 200 points
Part Number: BQ2057C

Tool/software:

Hi,

I am using BQ2057WSN for my project. Please  find the schmatic below.

When I am connecting battery, Q2 is heating up and reaches up to 60 deg. 

Thanks,

Sankar.K

  • 0
    TI__Guru** 103930 points

    Hello Sankar,

    Can you clarify what the conditions are? Do you have a load after R26 so the body diode is heating the MOSFET? This is a linear charger so Q2 should heat up during charge.

    What is the current flowing through Q2? What is VBAT and DC+ voltage?

    Sincerely,

    Wyatt Keller