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TPS62442: dual phase operation possible?

Julian Affholderbach
Prodigy 170 points
Part Number: TPS62442

Tool/software:

Hello,

as I'm planning to use TPS62442 as a dual output step-down converter, I was thinking of using the same regulator in the same project in a dual phase configuration to provide more output current (4A) by "shorting" both output channels as in the attached picture and using only one resistor divider to connect to both feedback pins (green: new connections, red: removed).



Is there anything I should be aware of when using the regulator in a dual phase configuration, or would you not recommend using the regulator in this mode?

Many thanks in advance

  • 0
    TI__Mastermind 22150 points

    Hello Julian,

    thanks for using E2E.

    The configuration, you have in mind has not been tested. I quickly simulated this configuration with the help of the available PSpice transient model and it worked but Vout did not look stable.

    I would not recommend this configuration because there are several single phase 4A devices available (such as the TPS62810) which operate in a tested configuration and you would also save solution size and BOM cost.

    Best regards,

    Andreas.

  • 0 in reply to Andreas Mueller
    Prodigy 170 points

    Hello Andreas,

    thanks for your fast reply and your simulation.

    Of course there are other small devices, which are capable of higher currents, but the idea was, that if I'm using this regulator on the same board, I might be able to reuse it.

    Also Vout looks instable in the simulation, maybe I'll get an eval board and test it. If the transfer function is stable, there is no need to worry.

    Best regards,

    Julian

  • 0
    TI__Mastermind 22150 points

    Hello Julian,

    thanks a lot for your feedback.

    Then I will close this thread for now. You can still reply to this thread after it is closed, or you can create a new thread if you have more questions.

    Best regards,

    Andreas.