Patent ID: 11916477
Assignee: WUXI CHIPOWN MICROELECTRONICS CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. The non-isolated power supply system according to claim 10, wherein the control unit further comprises: a third output end, which is coupled to a control signal input end of the boost unit and is adapted to control the boost unit to switch on or off, wherein when the output voltage of the non-isolated power supply system is high and a voltage of the chip power pin reaches a working voltage of the driving circuit, the third output end of the control unit outputs a third control signal to control the boost unit to switch off, and the chip power pin provides the working voltage for the driving circuit through the buffer unit of the switching power supply chip; and when the output voltage of the non-isolated power supply system is low and the voltage of the chip power pin is less than the working voltage of the driving circuit, the third output end of the control unit outputs the third control signal to turn on the boost unit and an output end of the boost unit provides the working voltage for the driving circuit.