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BQ25970: standalone charge pump board doens't work

peter huang
Prodigy 70 points
Part Number: BQ25970

Hello Sr,

As caption ,base on BQ25970EVM-893 I made a standalone board but it doens't work,none of regulate the input voltage how many volts there is no charge current delivered out from it even if up to 10-12Vdc on input,  and the IIC communication is ok(I followed up the guidance of bq25970 PWR893 Evaluation Module), any tips(from HW side/SW side) can you provide me to guide me how debug this board is very appreciated!BTW is anything hidden on the user guideline :)..?

Best regards!

Peter

  • 0
    TI__Mastermind 34055 points

    Hi Peter,

    Can you please explain in more detail the issues you are seeing? Did you follow Sections 2.1, 2.2, 2.3, 2.4, and 2.5 of the User Guide as well as Table 3?

    Regards,

    Mike Emanuel

  • 0 in reply to Michael Emanuel35
    Prodigy 70 points

    HI Michael,

    In fact ,before to make this standalone board I had follow above you mentioned Sections run your demo, it works well with EV2300 Kit,also I had try this demo board through our own protocol board, it works well too, then I re-designed a standalone board base on bq25970EVM-893 Schematic and it's index,rightnow the new board doesn't work,there is no charge current deliver out to cell,none-of adapter deliver how many volts , MCU can  write & read commands via IIC with BQ25970.right now I am urently needing to fix this board,any tips can you help to examine it?

    Best regards!

    Peter

  • 0 in reply to peter huang
    TI__Mastermind 34055 points

    Peter,

    Can you please describe in more detail what you are doing differently? Can you include a register dump?

    Regards,

    Mike Emanuel