• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 1149 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Buck-Boost High-side switch RC Snubber

Michael Dalton
Intellectual 650 points

Hello,

 

I have just read ("Minimizing Ringing at the Switch Node of a Boost Converter - SLVA255), and was wondering do Buck-Boost converters need RC snubbers across the switch node as well as boost converts?

And if so would you work the values out in the same fashion as for the boost converter?

Would the R and C be placed in parallel with the switch?

 

Regards

Michael Dalton

  • 0
    TI__Mastermind 36110 points

    Typically, a snubber is not needed for a buck, boost, or buck-boost.  Good layout and proper component selection should result in a design that does not require a snubber.  The vast majority of Texas Instruments power designs do not need snubbers.  If you do have any issues with layout or noise in your circuit that can be helped with a snubber, the circuit values can be calculated using the SLVA255 application note.  The snubbers would be placed across the FETs that connect to ground.