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TPS61236 application question

Chen Bogey8
Mastermind 9990 points

Dear Sir

we want use TPS61236 in Vin 3.2~5V/ Vout 5V /3A application. 

may we check if TPS61236 have 100% Duty-Cycle Mode when VIN > VOUT?

or if there have any risk that Vin=Vout =5V?

                                          Best regards,

                                                            Bogey

  • 0
    TI__Mastermind 46905 points
    HI Bogey

    this device can't support VIN=VOUT, the VIN must be 0.6V lower than VOUT

    may i know why there is 5V in the VIN?

    thanks
    Jasper Li
  • 0 in reply to Jasper Li
    Mastermind 9990 points

    Hi Jasper

    it is due to customer have 2 power source battery in and DC in.

                                     Best regsrds,

                                                    Bogey

  • 0 in reply to Chen Bogey8
    TI__Mastermind 46905 points

    hi Bogey

    i guess the battery voltage is 3.3~4.2 V and DC voltage is 5 V from USB. What about bypass the 5V input directly to the VOUT of the TPS61236 using an external mosfet? So the device don't need to operate at VIN=VOUT condition.

    may i know more about the application

    1. how customer separate the two input power: battery and 5-V DC .

    2. what is the end product and what TPS61236 is used to power?

    Thanks

    Jasper Li