Patent ID: 11942786
Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 14:
15. A harmonic distortion compensation method for a switched-mode power supply, comprising:
detecting a rectified and filtered DC voltage having a periodic dome-shaped waveform;
deriving, from the waveform, a rising phase information and a falling phase information of each cycle of the DC voltage; and
generating a compensation signal based on the rising phase information and the falling phase information of each cycle, the compensation signal configured to trigger a main power stage module containing a power switch to perform a compensation operation based on the compensation signal, the compensation operation being performed to accomplish total harmonic distortion compensation of the switched-mode power supply system,
wherein rising portions of the DC voltage waveform represent rising phases of individual cycles, and falling portions of the DC voltage waveform represent falling phases of individual cycles, and
wherein the compensation signal indicates adjusting an on-time and/or an off-time of the power switch in the main power stage module.