US 12,308,731 B2
Controller of power conversion circuit and operating method thereof
Chih-Lien Chang, Zhubei (TW); Wei-Hsiu Hung, Zhubei (TW); Yen-Chih Lin, Zhubei (TW); and Chen-Xiu Lin, Zhubei (TW)
Assigned to UPI SEMICONDUCTOR CORP., Zhubei (TW)
Filed by uPI semiconductor corp., Zhubei (TW)
Filed on Mar. 10, 2023, as Appl. No. 18/181,877.
Claims priority of application No. 202210591273.2 (CN), filed on May 27, 2022.
Prior Publication US 2023/0387797 A1, Nov. 30, 2023
Int. Cl. H02M 1/00 (2007.01); H02M 3/157 (2006.01)
CPC H02M 1/0009 (2021.05) [H02M 1/0025 (2021.05); H02M 3/157 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A controller of a power conversion circuit, coupled to a smart power stage (SPS), configured to control the SPS to convert an input voltage into an output voltage and provide an output current, the SPS providing a current monitoring signal to the controller, the controller comprising:
a control loop, coupled to the SPS, configured to generate a pulse width modulation (PWM) signal according to the output voltage and a reference voltage to control an operation of the SPS;
a sampling circuit, coupled to the SPS, configured to receive the current monitoring signal and sample the current monitoring signal according to the PWM signal to obtain a calibration reference value; and
a current reconstruction circuit, coupled to the control loop and the sampling circuit, wherein the current reconstruction circuit configured to generate a reconstructed current corresponding to the current monitoring signal according to the input voltage, the reference voltage and the PWM signal and calibrate the reconstructed current by using the calibration reference value.