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TPS25751EVM: TPS25751EVM Board with DC-JACK Input

Sky Lin
Prodigy 10 points
Part Number: TPS25751EVM
Other Parts Discussed in Thread: BQ25751, BQ25758A

Tool/software:

HI There

I have a project about  a charge Docking(Blue block) . My BlockDiagram as Below

There is a adatper supply 20V to Docking ,then we can put tablet on docking for charging

I  want to make sure how to connect VIN side and VBAT Side of Charger IC BQ25751

how about the block diagra as below ,is it right??  if it`s wrong,please share a right Block diagram ,thanks

  • 0
    Prodigy 10 points

    we try to use the BD as below capture ,we find the VBUS of type-C connector  is  0~5V  up and down  ,it can`t be stable as 5V

    Do you have any idea about this situation ??

    BTW ,the adapter is DC-IN adapter ,it`s not type-C adapter.  

    Quick Buy

  • 0 in reply to Sky Lin
    TI__Mastermind 30132 points

    Hi Sky, 

    Thank you for reaching out!

    From the PD perspective, this is a Source-only application, correct? (i.e. the USB-C port will be a power provider only?). 

    I will loop in the BQ team to assist further on the BQ input adapter. 

    Best Regards, 

    Aya Khedr

  • 0 in reply to Aya Khedr
    Prodigy 10 points

    Yes ,its a source-only docking .please make him reply me ASPS,thanks

  • 0 in reply to Sky Lin
    TI__Mastermind 30865 points

    Hello Sky,

    I'm confused as to the application. It looks like the customer needs a DC-DC converter to dock the tablet.

    The BQ25751 is a lead-acid battery charger. Does this application have a battery? Are you referring to the BQ25758A? The BQ25758A is a DC-DC converter that can support 20V input and 5/9/15/20V output.

    If your system was referring to the BQ25758A, the TPS part and the BQ part will need to swapped around.

    Best Regards,
    Ethan Galloway