• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 64 subscribers
  • Views 483 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

MOSFET power losses and how they affect power-supply efficiency

Jonathan Navor
Expert 7845 points

Hi TI team,

We need your expertise for further explanation, where the equations 3 and equations 8 derived from the application note AAJ1Q of 2016 : https://www.ti.com/lit/an/slyt664/slyt664.pdf.

On reading this excellent application note by George Lakkas, We have a question concerning the Equations EQ3 and EQ8. In both of these equations the term “(I^2 ripple/12) appears. Having read the note a few times we confess that we are at loss to fathom where the (÷12) is derived from. We would be most grateful for an explanation if you enlighten us.

Thank you in advance for your time and kind attention to this matter. Looking forward on your response. Have a great day.

Kind regards,

Jonathan Navor

  • 0
    TI__Mastermind 29535 points

    Hi Jonathan,

    Thanks for the inquiry. I did not write this application report. I believe this is a simplified estimate of the rms current thru the FETs. For a more detailed analysis, please refer to the application report in the link below. I am going to reassign this to the BMC-MCS apps team.