• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 145 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.

TPS62933EVM: What else to do to operate EVM at 2MHz?

Lauren Mayfield
Expert 7755 points
Part Number: TPS62933EVM

Hi team,

My customer is trying to operate this EVM at 2MHz. They have made the following changes- R7 = 10k, JP1 installed, R4= 31.6k. 

The EVM is still operating at 500kHz. What else do they need to do to have it operate at 2MHz?

Thanks,
Lauren

  • +1
    TI__Expert 7320 points

    Hi Lauren,

    What's your test condition? Input voltage, load current?

    I made the same change on our EVM and found the frequency is ~600k under 12Vin 0.6A loading. However, if you increase the loading you can find the frequency becomes normal.

    That's because the 6.8uH inductor on the EVM is too large which cause lower on-time slope of the inductor current, and the on-time is longer than expected and the internal error amp is saturated. To ensure the output voltage regulation, the device must decrease its frequency. 

    You can get near 2MHz frequency after you change the inductor into 1uH.