Patent ID: 11863057
Assignee: ALPHA AND OMEGA SEMICONDUCTOR INTERNATIONAL LP
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A system comprising:
a load circuit; and,
a regulated power supply circuit configured to receive power from a power source and provide power to the load, the regulated power supply circuit comprising:
a feedback control circuit configured to generate a control output signal from both a predetermined reference and a control input signal, wherein the control input signal corresponds to a pulse-width modulated output delivered to the load circuit;
a frequency modulation circuit configured to generate, in response to a frequency control input signal, a frequency control output signal corresponding to a switching frequency of at least one switch circuit, wherein the switch circuit is configured to generate the pulse-width modulated output; and,
a crossover frequency tuning engine (XFTE) configured such that, in a first mode corresponding to a steady state, the XFTE is quiescent and, in response to a transient in the frequency control output signal, the XFTE operates in a second mode such that the XFTE generates a transient control signal to cause a predetermined relationship be maintained between a switching frequency and a crossover frequency, wherein the crossover frequency corresponds to a frequency of a closed-loop circuit at unity gain, the closed-loop circuit including at least the feedback control circuit and the frequency modulation circuit.