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

Claim 14:
15. A power supply method for a switch-mode power supply system, comprising:
providing a switch-mode power supply controller comprising a built-in energy storage unit, an output-voltage power supply 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; and
powering the built-in energy storage unit using an output voltage from the switch-mode power supply system by the output-voltage power supply unit such that the built-in energy storage unit provides an operating voltage for the switch-mode power supply controller, which ensures normal operation of the switch-mode power supply controller,
wherein 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.