US 12,424,919 B2
Controller and method for controlling a voltage converter
Kai Chen, Sichuan (CN); and Zhiguo Liu, Sichuan (CN)
Assigned to Beijing Big Moment Technology Co., Ltd., Beijing (CN)
Filed by Beijing Big Moment Technology Co., Ltd, Beijing (CN)
Filed on May 11, 2023, as Appl. No. 18/196,382.
Claims priority of application No. 202210517368.X (CN), filed on May 13, 2022.
Prior Publication US 2023/0369955 A1, Nov. 16, 2023
Int. Cl. H02M 3/156 (2006.01); H02J 7/00 (2006.01); H02M 1/00 (2006.01)
CPC H02M 1/0003 (2021.05) [H02J 7/007 (2013.01); H02M 3/156 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A controller for controlling a voltage converter, said voltage converter receiving an input voltage and generating a real-time charging current and a real-time charging voltage to charge a battery, wherein said the controller comprises:
a compensation circuit operable for generating a compensation voltage, wherein said compensation circuit comprises:
a first operational amplifier operable for comparing said real-time charging current with a preset charging current to generate a first comparison result;
a second operational amplifier operable for comparing said real-time charging voltage with a preset battery voltage to generate a second comparison result; and
a current source operable for charging a capacitor, wherein a voltage across said capacitor comprises said compensation voltage, and wherein said compensation voltage is adjusted by said first comparison result and said second comparison result;
a driving circuit, coupled to said compensation circuit, operable for generating a pulse width modulation signal based on said compensation voltage; and
a control circuit, coupled to said driving circuit, operable for generating a control signal based on said pulse width modulation signal and a current indication signal indicating said real-time charging current,
wherein said driving circuit is further operable for generating a first switching signal based on said pulse width modulation signal to control an upper switch of said voltage converter, and generating a second switching signal based on said control signal to control a lower switch of said voltage converter.