Patent ID: 11955894
Assignee: SILANNA ASIA PTE LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 16:
17. The flyback converter of claim 13, wherein:
the valley tuning finite-state machine comprises:
a storage device that includes the look-up table; and
a logic circuit configured to:
determine a length of time that corresponds to the pulse width of each pulse of the plurality of pulses of the comparison signal, wherein the length of time corresponds to the half-period of the oscillation ripple;
produce the divided pulse width from each pulse width, wherein the divided pulse width corresponds to the quarter-period of the oscillation ripple;
determine that the auxiliary signal is less than the reference voltage;
wait the time period that corresponds to the divided pulse width stored in the look-up table if the auxiliary signal is less than the reference voltage; and
produce the valley point signal after waiting the time period.