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About BQ24193 OTG / PSEL Status judgment after Device power ON.

March Jasper
Expert 2340 points

Hi

I have question OTG / PSEL Status check timing after Power ON.

Now  I wonder about these OTG / PSEL after Device Power ON  ( Vbus IN).

Because of   Device ILIM ( Current Limit ) select by  OTG / PSEL High or Low Status.

If Device just Power ON (  Vbus IN ) , if  these pin is Low Level  , device  ILIM setting will be  3A .

 * 3A  is device default .

[ Question ]

   When device chekc OTG / PSEL ( H or L ) Level  after Device Power ON ??

  Device REGN will  be OK after  100msec .

 Some People said   USB Charger spec is  after  " 600msec "    is it correct?

 We want to know about these spec after Power ON .

Could  you tell us about these spec.

 

Thanks and Regard

M.Jasper

  

 

 

  • 0
    TI__Mastermind 31120 points

    There is no defined power up spec, but the REGN typically comes up within 300mS of the VBUS being good.  I would suggest 400ms maximum and then after the REGN is up the charging starts within 200ms, so I would use 500ms as a time to expect the charging to be implemented.

    Many times it will be faster depending on how the charge is enabled and disabled.