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bq76200's DSG pin issue

Tino Pan
Intellectual 300 points
Other Parts Discussed in Thread: BQ76200

Hi , 

I use the bq76200 on 6S battery pack , Attached is my circuit and layout .

Enable DSG_EN pin , I'm going to measure the output voltage on bq76200's DSG pin . The voltage is fail  , tat time is 34V and at time is 6.5V ...  

  • 0
    TI__Expert 6085 points

    Hi  Pan,

    (1) Please check , if Charge Pump is ENABLED all the time.

    (2) CHG and DSG pin can drive a load C= 10nF. With paralleling of FET, capacitance  will add up. Hence , you may want

    to select  a series resistance to the gates .   Q= I T ; you will need to comprise the rise-time for a clean Turn ON /Off.

    Please send a scope capture and trigger from the  DSG-EN to the DSG  

    hope this helps.