Hello Team,
I'm working with a LM5175 HP EVM using the following setup:
- 125kHz programmed switching frequency
- Externally syncing 250kHz
- 12pF slope capacitor
- Well regulated 12V nominal input
When I test the setup with a full constant current load of 40A, I get a ripple on the output of 90mV with 96.5% efficiency. However, if I "refresh" the sync frequency by re-applying it, the controller adjusts the output so that I see 60mV of ripple and 97% efficiency. I would like to be able to operate with the 60mV of ripple and 97% efficiency without having to re-apply the sync frequency.
Does anyone know why re-applying the sync frequency might cause this change in performance? I appreciate the help!
Best Regards,
Benjamin Moore
