US 11,909,300 B2
Switch-mode power supply (SMPS) controller, SMPS system and power supply method for SMPS system
Rulong Jiang, Shanghai (CN); Liqiang Hu, Shanghai (CN); Shungen Sun, Shanghai (CN); Zhen Zhu, Shanghai (CN); Xiaoru Gao, Shanghai (CN); Yihui Chen, Shanghai (CN); Hong Zhang, Shanghai (CN); and Pengfei Lu, Shanghai (CN)
Assigned to SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD., Shanghai (CN)
Filed by SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD., Shanghai (CN)
Filed on Jun. 4, 2021, as Appl. No. 17/339,748.
Claims priority of application No. 202010506989.9 (CN), filed on Jun. 5, 2020.
Prior Publication US 2021/0384832 A1, Dec. 9, 2021
Int. Cl. H02M 1/00 (2006.01); H02M 3/156 (2006.01); H02M 1/36 (2007.01)
CPC H02M 1/0006 (2021.05) [H02M 3/156 (2013.01); H02M 1/0048 (2021.05); H02M 1/36 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A switch-mode power supply controller for controlling an output voltage from a switch-mode power supply system, the switch-mode power supply controller comprising an output-voltage power supply unit, a built-in energy storage unit, a high-voltage power supply unit, a power sampling unit and a logic control unit, wherein the built-in energy storage unit and the logic control circuit are integrated in a single package, wherein:
the output-voltage power supply unit has a terminal connected to an output voltage feedback terminal of the switch-mode power supply system and another terminal connected to a power input terminal of the built-in energy storage unit, and the output-voltage power supply unit is configured to charge the built-in energy storage unit using the output voltage from the switch-mode power supply system;
the built-in energy storage unit has a power output terminal connected to an operating voltage terminal of the logic control unit and is configured to provide operating voltage for the logic control unit to operate;
the high-voltage power supply unit has a terminal connected to a bus DC voltage terminal of the switch-mode power supply system, the high-voltage power supply unit has another terminal connected to the power input terminal of the built-in energy storage unit; and
the logic control unit is configured to optimize a ratio of lengths of time respectively with the output-voltage power supply unit and the high-voltage power supply unit serving as a power supply based on measurements from the power sampling unit, the power sampling unit is configured to sample a current flowing through a power switch, and the output-voltage power supply unit is configured to charge the built-in energy storage unit under the control of the logic control unit over part or all of a load range for the switch-mode power supply system.