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Asking for the QC/ PD application

SHH
Mastermind 32146 points
Other Parts Discussed in Thread: TPS2500, TPS65987D


Hi team,

here is the customer design requirement. would you please suggest the proper solution?
Input voltage range: 3~4.4V from battery
Output connector : USB-C connector or USB-A connector
Target ~18W output ability: QC / PD quick charge protocol to charge target device.

BR,
SHH

  • 0
    TI__Mastermind 30000 points
    Hello,

    You will need to add a dc-dc to boost the voltage from the 3~4.4V or higher for 5V on VBUS or higher if you wish to use Type-C PD.

    You could use a device like the TPS2500 that has a built in dc-dc, but from what I know of the part, it is only cable of supporting 7.5W and cannot support QC. I would post another E2E question for this specific part and see what the experts covering this part say.

    If you do integrate a dc-dc, you can use the TPS65987D which is a single Type-C PD port controller, has a built in power path, and will be able to support the 18W output requirement.

    Let me know if this helps answer your question or not!
  • 0 in reply to Adam Mc Gaffin
    TI__Mastermind 32146 points
    Hi Adam,
    What is the boost device that can be controller by TPS65987D?

    BR,
    SHH
  • 0 in reply to SHH
    TI__Mastermind 32146 points
    Hi Adam,
    Can you please help for the question?


    BR,
    SHH
  • 0 in reply to SHH
    TI__Mastermind 30000 points

    Hello,

    You can use almost any boost device connected to the TPS65987D. If you look at the TPS65987-90EVM, we use a buck, but the same approach can be used for a boost. GPIO's from the TPS65987D are connected to a series of fets and resistors to the feedback resistor of the dc-dc. Depending on what voltage contract is negotiated between the two devices, will output a specific voltage. For example, if a voltage of 20V is negotiated between the two PD controllers, and 20V is the 4th PDO option, then that specific GPIO event will be triggered, output a voltage high, enable the external fet, and change the output of the dc-dc to 20V.

    You can refer to the GPIO Events table within the Host Interface Technical Reference manual to see the full list of GPIO events. For this specific feature, you will use "SourcePDO0Contract_Port1" events.

    Hope this answered your question. If so, please click THIS RESOLVED MY ISSUE