Patent ID: 11909300
Assignee: SHANGHAI BRIGHT POWER SEMICONDUCTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
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.