Controller chip for a flyback converter, corresponding flyback converter and switched-mode power supply system

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United States of America Patent

PATENT NO 12088192
APP PUB NO 20230082592A1
SERIAL NO

17942955

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Abstract

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A controller chip of a flyback converter, a flyback converter and a switched-mode power supply system are disclosed. In the controller chip, a current scaling module is added, which converts a feedback current signal at a feedback pin of the controller chip to allow compensation capacitor with a small capacitance to be integrated into the chip to constitute a required pole compensation module. In this way, a pole required by the feedback pin FB can be successfully provided in the chip. As a result, filtering of high-frequency noise in a feedback path in which the feedback pin FB is located can be achieved, reducing ripple in an output voltage generated by the flyback converter. Moreover, without changing a sampling gain and the compensation pole, it is allowed to greatly reduce the compensation capacitance, for example, to the order of 10 pF.

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Patent Owner(s)

Patent OwnerAddress
SHANGHAI BRIGHT POWER SEMICONDUCTOR CO LTDROOM 102 BUILDING 2 AND FLOOR 9-12 BUILDING 3 NO 5005 SHENJIANG ROAD PILOT FREE TRADE ZONE SHANGHAI 201206

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gao, Xiaoru Shanghai, CN 24 58
Yang, Pengbo Shanghai, CN 10 31

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