• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 331 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.

LM5164: Efficiency vs. Inductor

Mat1980
Intellectual 1260 points
Part Number: LM5164

Hello Team,


could you help me to understand, why the efficiency does increase in the quick start calculator with smaller inductors in the region of 1 to 100mA?

At what load is the device operating in pulse skipping mode?


Thanks

Mat

  • 0
    TI__Expert 6245 points
    Hello Mat,

    The LM5164 is a COT converter. The on-time is set by the value of RON’s resistor. As long as the part is running in discontinuous mode, since a smaller inductor will allow a greater charge through during each on pulse, the converter’s frequency is lower. Lower frequency overwhelms the effect of higher peak current giving a higher efficiency.

    Regards, Robert