Patent ID: 11901885
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An operating method for a pulse width modulation-based (PWM-based) overcurrent protection circuit, comprising:
detecting, by a load-detection circuit, an overcurrent flowing through a power-switch circuit that is connected with the load-detection circuit according to a load at an output end of the power-switch circuit;
generating, by the load-detection circuit, an overcurrent protection voltage when the overcurrent is detected;
dynamically adjusting, by a pulse-width-modulation circuit, a clock-voltage signal according to the overcurrent protection voltage; and
dynamically controlling, by a pulse-width-modulation circuit, a duty-cycle width of a voltage outputted by a charge pump when the overcurrent is detected, so as to suppress the voltage outputted by the charge pump to the power-switch circuit, and accordingly correct an output voltage from the power-switch circuit for suppressing the overcurrent.