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BQ40Z80: Cannot turn on CHG

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Part Number: BQ40Z80

Hi,

I am testing my circuit about bq40z80.

I tried to turn on the CHG mos by CHG_FET_toogle, and Vgs of CHG fet doesn't change, but samely, when using EVM of BQ40z80,I can see Vgs  of CHG becomes 10V.

Could I know why?'

Thank you !!


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