Notification 614 - Estimated Phase margin is too low.

CATEGORY

ISSUE / RESULT

FIX / REFERENCE(S)

Warning

Estimated Phase margin is too low. IT is recommended that designs have greater than 45 degrees of phase margin.

  • Please check the ”Use Phase Boost Network checkbox” on the Control loop components dialog.

  • Reduce target crossover frequency

  • Increase gain limiting resistor RF3

 

It is recommended to have more than 45 degrees of phase margin on all designs to ensure stability of power supplies. Lower phase margin causes increased overshoot and ringing in the transient response of the power supply.