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TPSI2140-Q1: block diagram misunderstand in datasheet

Amber Si
Intellectual 1710 points
Part Number: TPSI2140-Q1

Tool/software:

Hi team,

My customer  have some misunderstand about VM pin connection. look like VM is connect to center of two back to back MOS, so can it use as two channels switch? I mean VM pin use as another switch input like S1/S2.

Regards,

Amber

  • 0
    TI__Prodigy 50 points

    Hello Amber,

    Thanks for checking with our team. The SM pin cannot be used as a two channel switch. The purpose of this pin is to allow for thermal dissipation within the device.

    With this in mind, we currently offer the TPSI2072-Q1, which has two enable channels that each control a single back-to-back FET.

    If you have any more questions, please let us know. 

    Regards,

    Jose

  • 0 in reply to Jose Rojo
    TI__Intellectual 1710 points

    Hi Jose,

    but I'd like to know why look like VM is connect to center of two back to back MOS?, it will misunderstand others from datasheet block diagram

    Thanks.

    Regards

    Amber

  • 0 in reply to Amber Si
    TI__Prodigy 50 points

    Hello Amber,


    For TPSI2140-Q1, the SM is electrically connected to the common-source of the center MOSFETs. However, the device does not have independent enable signals. The device is designed to turn on/off all MOSFETs from a single enable signal. This is the reason it cannot be used as a two-channel switch.

    Can you provide more context on the exact application from the customer, is this a concern? And why they would like to configure it as a two channel switch?

    As mentioned before, if they do require two independent paths, TPSI2072-Q1 will be a better fit. 

    Regards,

    Jose Rojo