Control circuit for controlling a power switch in a switching power supply circuit for improved EMI performance

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United States of America

PATENT NO 12143022
APP PUB NO 20220399818A1
SERIAL NO

17848792

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Abstract

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A control circuit for controlling power switch in switching power supply circuit. The optimization circuit comprises an adaptive amplitude jitter generating circuit, a comparison circuit and a trigger circuit. The adaptive amplitude jitter generating circuit is used to generate a periodic amplitude jitter signal according to the feedback voltage signal indicative of the output of the switching power supply circuit. The comparison circuit is used to compare the sampled voltage signal with periodic amplitude jitter signal, and generate an output signal with periodic fluctuations. The trigger circuit is used for outputting the control signal for driving the power switch according to the output signal with periodic fluctuations and the clock signal.

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Patent Owner(s)

Patent OwnerAddress
SHENZHEN KIWI INSTRUMENTS CORPORATIONRM 3303 BLDG 8 INTERNATIONAL INNOVATION VALLEY NANSHAN DIST SHENZEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yu, Xiufeng Shenzhen, CN 6 1
Zhang, Bo Shenzhen, CN 1006 7322
Zhao, Wei Shenzhen, CN 814 5746

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