US 11,656,644 B2
Control circuit of power converter and reference voltage adjusting method thereof
Wei-Hsiu Hung, Zhubei (TW); Min-Rui Lai, Zhubei (TW); and Chih-Lien Chang, Zhubei (TW)
Assigned to UPI SEMICONDUCTOR CORP., Zhubei (TW)
Filed by uPI semiconductor corp., Zhubei (TW)
Filed on Aug. 9, 2021, as Appl. No. 17/396,823.
Prior Publication US 2022/0050487 A1, Feb. 17, 2022
Int. Cl. G05F 1/575 (2006.01)
CPC G05F 1/575 (2013.01) 18 Claims
OG exemplary drawing
 
1. A control circuit of a power converter, coupled to a first output circuit, the control circuit comprising:
a first sensing circuit, coupled to the first output circuit and configured to provide a first current sensing signal;
a reference voltage generation circuit, coupled to the first sensing circuit and configured to provide a reference voltage according to the first current sensing signal;
an error amplifying circuit, coupled to the reference voltage generation circuit and configured to receive the reference voltage and an output feedback voltage of the power converter to provide an error amplifying signal; and
a PWM circuit, coupled between the error amplifying circuit and the first output circuit and configured to receive the error amplifying signal and provide a control signal to control the first output circuit,
wherein the reference voltage generation circuit further receives the error amplifying signal and adjusts the reference voltage that the reference voltage generation circuit generates according to the error amplifying signal.