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BQ25703A: About Basic Question for BQ25703A

March Jasper
Expert 2340 points
Part Number: BQ25703A

Hi  

I have some basic question for  BQ25703A. 

Sorry...  I am very beginner for this device  please tell me these question.

1)  About  PROCHO Pin    

    We dose not use this pin ,  Dose we need   Pull UP or Open ??     

2)  About CMPIN snd CMPOUT pin 

    We dose not use these pin .   Dose we need  Pull UP or Open ?

    * DS said  CMPIN is ground   How to do CMPOUT Pin ?? 

3) About  EN_OTG Pin 

   We dose not use OTG function .   Dose we need  Pull Down or Open ?? 

4)  About  ILIM   function 

   We understood about  ILIM  voltage setting with current limit.  . 

   But we wonder about this  ILIM function,  what  happen after ILIM Current detect ?? 

   Charge Current Stop ??      Input current keep Limit Current ??  or   device became to  HIZ mode ??

Sorry ... very simple question . 

Thanks and Regard

March Jasper   (  Disty  Sugimoto ) 

 

    

  • 0
    TI__Expert 3320 points

    Hi March: 

    1)  This pin is defined for laptop customers, if you don't use it for laptop, you can use 3.3V/1.8V pull up with 10kohm resistor.

    2)  CMPIN should connect to GND if not use. CMPOUT should be 3.3V/1.8V pulled up with 10kohm resistor.

    3) About  EN_OTG Pin

        If you are not using OTG  then you can connect this pin to GND.

    4)  About  ILIM   function 

       When you touch the input current limit, the charger will clamp the input current, if system load increase further the charging current will reduce to to supply power to system as priority. If system load further increase, battery will work in supplement mode to provide power to system.

     When you pull LIM_HIZ pin lower than 0.4V the part will go into HIZ mode and latch off converter.

    Regards

    Shishuo

  • 0 in reply to Shishuo Zhao
    Expert 2340 points

    Hi Shishuo

    Thank you very much.

    I understood about this one .

    Thanks and Regard

    March Jasper  (  Disty Sugimoto )