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TPS51396A: Regarding MODE Selection pin

Sivaperakasam P
Prodigy 50 points
Part Number: TPS51396A

What is the difference between ECO mode and OOA mode.  We are going to use this regulator for 6A load, for our application which mode is preferable and why?

  • 0
    TI__Mastermind 18510 points

    Difference of these two modes are under light load,

    Since 20 to 20K Hz could be heard by human, OOA(out of audio) mode limits the lowest frequency to >20k, which is used to prevent audio noise at light load.

    ECO mode has no lowest frequency limitation, the frequency could be decreased to < hundreds of Hz, which could improve the light load efficiency. if you have efficiency reequipment you could choose Eco mode.

     Both modes are same for heavy load.

    Yuchang

  • 0 in reply to Yuchang Zhang
    Prodigy 50 points

    Sorry, please explain me clearly, It is suitable for heavy load or light load.  And from your explanation I came to know this pin used to control the noise frequency .

  • +1 in reply to Sivaperakasam P
    TI__Mastermind 18510 points

    Yes, ECO mode and OOA mode are only for light load.

    You can simply think OOA mode is only for control the frequency higher than Audio noise frequency.

    As I mentioned if you don't care about efficiency of light load. both mode are ok for you.

    Yuchang