Pulse width modulation-based overcurrent protection circuit and operating method for the same

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United States of America

PATENT NO 11901885
SERIAL NO

17375387

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Abstract

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A PWM-based (pulse width modulation-based) overcurrent protection circuit and an operating method for the same are provided. The PWM-based overcurrent protection circuit includes a pulse-width-modulation circuit that is connected to a charge pump and a load detection circuit of a power-switch circuit. The charge pump outputs a voltage to the power-switch circuit according to a clock-voltage signal. The load detection circuit is used to detect an overcurrent flowing through the power-switch circuit according to a load at an output end of the power-switch circuit. Thus, when the load detection circuit detects the overcurrent, the pulse-width-modulation circuit controls a duty-cycle width of the charge pump, so as to suppress the voltage outputted by the charge pump. Therefore, an output voltage from the power-switch circuit can be corrected for preventing or reducing the overcurrent.

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Patent Owner(s)

  • REALTEK SEMICONDUCTOR CORP.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chu, Li-Cheng Hsinchu, TW 19 105

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