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TPD4E001: can IO1&IO4 / IO2&IO3 connect together ?

Kai Lai
Expert 6146 points
Part Number: TPD4E001
Other Parts Discussed in Thread: TPD2E001

Hi Team,

I am finding a part can P2P replace USBLC6-2.https://www.st.com/resource/en/datasheet/usblc6-2.pdf

I found that we have TPD4E001 is pin to pin with it, but we are 4 Channel instead if two, so I'm asking this question : can IO1&IO4 / IO2&IO3 connect together and provide the same protection function ?

I know we have two channel TPD2E001 which have the same functional with USBLC6-2, but it is not P2P.

BR,

Kai

  • 0
    TI__Genius 14110 points

    Hi Kai,

    Connecting the inputs together will affect the functionality of the device, you would have two uni-directional diodes in parallel. Every diode has a slightly different forward voltage; even multi-ch diodes are not perfectly matched if you compare each channel. If two channels are connected in parallel, the one with the lower voltage drop will conduct most of the current.

    Regards,

    Sebastian 

  • 0 in reply to Sebastian Muriel
    TI__Expert 6146 points

    Hi Sebastian,

    Thanks for your reply first.

    But I'm curies, even the one(diode) with the lower voltage drop will conduct most of the current, it should be fine ? Since in the ideal design it should be able to support the full current just like we use a single channel for each signal path ?

    So will you think using two diodes in parallel is not workable ? And have risk ?

     

    Kai

  • 0 in reply to Kai Lai
    TI__Genius 14110 points

    Hi Kai,

    It should be fine, if the customer is concerned, they could also just float the second input pin on each line. 

    Regards,

    Sebastian