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BQ21061: design review

Yuan_1980
Intellectual 410 points
Part Number: BQ21061

Hi,

please help to check  my design. 

and layout as below 。 thanks. 

1.brd

  • 0
    TI__Mastermind 23410 points

    Hi Yuan,

    For the schematic, there are a few questions/statement just to ensure they match what you intend. 

    • /MR pin pulled low. By default the BQ21061 uses this as a hardware reset button. Do you intend to change this? Pulling the /MR pin low may create issues when configured as a reset button by default. 
    • /LP pin pulled to VIO. The /LP pin allows for the configuration of low power mode when powered by the battery. By pulling this high, the device will not operate in low power mode when only powered by the battery

  • 0 in reply to Anthony P Pham
    Intellectual 410 points

    Anthony,

    Thanks for the reply. Actually, I will use a MCU(3.3V ) to control BQ21061 in this design,  Please kindly further suggest how to connect below four pins to MCU. 

    I really didn't find a close reference design . 

    LP -  does this pin need to be pull-up?

    PG -  does this pin need to be pull-up ?

    INT -  

    MR - can this pin be directly connect to MCU?

     

  • 0 in reply to Yuan_1980
    TI__Mastermind 23410 points

    Hi,

    The /LP pin is an input pin for the BQ21061, it does not need a pull up if your MCU is going to be controlling the /LP pin. The /INTand /PG pins do require a pull-up, as they are open-drain status indicator outputs. 

    The /MR pin is intended to used with a push-button for a manual user reset. You can look at the typical application design in the datasheet that I've attached.