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BQ29200: battery application

mario soccini
Intellectual 730 points
Part Number: BQ29200

Hi.

I have a 2 cell lithium  battery application.

I charge with MCP73842-8.4  from  12V (AC ADAPTER) , the batteries go to dc-dc  converter.

I woul like to use BQ29200.

The question are ?

Can i  have the Cell balancing always enabled, during the charge and during the discharge of the battery  ?

How can i know if the balance is ok ? Maybe i have to measure the voltage of the battery ?

Do you think the schematic is correct ?

Thanks in advance

Mario.

  • 0
    TI__Mastermind 25955 points
    Hi Mario,

    The bq29200 can perform automatic voltage-based cell imbalance correction by modifying the loading of each cell. Balance can start when the cell voltages differ by > 30 mV nominally and stops when the difference between the cells is 0 mV nominally.

    You can confirm the voltage balance of the cells by using a multimeter or oscilloscope on your bench.

    A host MCU may disable/enable cell balancing through use of the CB_EN pin.

    The System Example Schematic in section 9.3.1 of the bq29200 datasheet is correct. Values may differ based on application.

    If the above answers your question, please click on "This Resolved my Issue" button to benefit others who have the same issue.

    Sincerely,
    Bryan Kahler