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TI Home » TI E2E Community » Support Forums » Power Management » Power Modules » Power Modules - Forum » TPS84320's application
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TPS84320's application

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lei gong
Posted by lei gong
on Dec 26 2012 05:24 AM
Intellectual590 points

I have some questions about TPS84320 ,i can not sure.

For the simple use the chip of TPS84320 , according to the datasheet about TPS84320, i can float these pins as followed :"INH/UVLO","SS/TR","PWRGD" ,can i ?

 But how can i deal with the pins of "PH" ? The pin is described that "Phase switch node.These pins should be connected to a small copper island under the device for

thermal relief.Do not place any external component on this pin or tie it to a pin of another function.".Can i float it or connect it to the GND ? Followed is the schematic:

Is it right ?

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  • JohnTucker
    Posted by JohnTucker
    on Dec 26 2012 08:33 AM
    Verified Answer
    Verified by J Arrigo
    Guru50245 points

    You cannot connect that to GND or any other signal.  It must be tied to a small copper area.  Since that signal is not tied to any other you can consider it floating.

    John Tucker

    Consumer DC/DC Applications

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  • J Arrigo
    Posted by J Arrigo
    on Dec 27 2012 10:08 AM
    Verified Answer
    Verified by J Arrigo
    Expert3065 points

    The PH node must not be connected to GND or any other potential. The PH pins must be connected to one another using a copper island beneath the device.

    The INH/UVLO, SS/TR, & PWRGD can be left floating.

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  • lei gong
    Posted by lei gong
    on Jan 03 2013 19:51 PM
    Intellectual590 points

    Hi John,

       Thanks for your reply !

    Best wishes,

     Lei

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