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BQ76200: BQ76200

Part Number: BQ76200
Other Parts Discussed in Thread: BQ78350, , BQ76940

Hello,

   I am using BQ76200 with BQ76940 and BQ78350 for 48V battery pack. 

BQ76200 is making Buzz sound and CHG and DSC of diver IC are not turning ON wat may be the reason. 

  • Hi Gururaj,

    It sounds like the part is being pulled into UVLO when it tries to turn on.  The charge pump capacitor may be too small, the charge pump overloaded,  or the loss may be high during DSG turn on.  See the application note http://www.ti.com/lit/pdf/slua794 

    You might debug with the BQ78350 FET test commands to see if the problem occurs with CHG or DSG.