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TPS23730: current limit design

Allen yang
Intellectual 910 points
Part Number: TPS23730

Tool/software:

Hi Team,

The input adopts a shunt design with two sets of inputs, 30W and 50W

50W for other adapters

30W is powered by POE

POE design Vin = 54V, Vout=12V，Iout=2.5A

Can the output be controlled to maintain 2.5A output?

  • 0
    TI__Mastermind 37101 points

    Hi Allen,

    Thanks for reaching out! 

    We will take a look on your question and get back by this week.

    Best regards,

    Diang 

  • 0 in reply to Diang Xing
    TI__Mastermind 37101 points

    Hi Allen,

    It is recommended to use TPH and TPL pins as indicators of adapter input or PoE input. When SCDIS pin is open, you can enable the 50W only when TPH and TPL are both low. 

    Class 0-3 or passive injector (0 - 1 class event): TPH = Hi-Z, TPL = Hi-Z

    Class 4 (2 - 3 class event): TPH = Hi-Z, TPL = Low

    Class 5-8 (4 - 5 class event): TPH = Low, TPL = Hi-Z

    APD = High: TPH = Low, TPL = Low

    Best regards,

    Diang