Patent ID: 11901808
Assignee: INNOLUX CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for protecting a circuit including an input end, a first switch, and a capacitor electrically connected to the input end through the first switch, comprising:
providing a first current source electrically connected to the capacitor through a second switch;
providing a detection and control unit to turn on the second switch at a first time point so as to enable the first current source to charge the capacitor; and
using the detection and control unit to detect a stored voltage value of the capacitor at a second time point, and compare the stored voltage value with a reference voltage value,
wherein, the circuit further includes a diode and an inductor, and the first switch is electrically connected to the input end and the inductor, when the stored voltage value is greater than or equal to the reference voltage value, the detection and control unit turns off the second switch and turns on the first switch and, when the stored voltage value is smaller than the reference voltage value, the detection and control unit turns off the second switch and keeps the first switch off.