Switching power converter circuit, clock generator circuit and clock generation method having spread spectrum

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United States of America Patent

PATENT NO 11811321
APP PUB NO 20220360173A1
SERIAL NO

17736374

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Abstract

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A spread spectrum switching power converter circuit includes: a power stage circuit which includes an inductor and a power switch and is configured to switch the power switch according to a switching signal having spread spectrum for power conversion; a variable frequency oscillator, which generates a spread spectrum clock signal according to a spread spectrum control signal; a spread spectrum control circuit, which generates the spread spectrum control signal according to a first clock signal and a second clock signal; and a pulse width modulation circuit, configured to generate the switching signal according to a feedback signal based on the spread spectrum clock signal. The spread spectrum control circuit generates the spread spectrum control signal by sampling and combining a periodic waveform and a random waveform. The random waveform is generated according to the first clock signal and the periodic waveform is generated according to the second clock signal.

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Patent Owner(s)

  • RICHTEK TECHNOLOGY CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hsu, Chen-Lin Taoyuan, TW 2 0
Lee, Chia-Chun Hsinchu, TW 34 458

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