Power supply circuit with secondary side to primary side communication

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United States of America Patent

PATENT NO 10027165
APP PUB NO 20170366044A1
SERIAL NO

15600565

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Abstract

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An electrical circuit for a power supply includes a primary-side controller integrated circuit (IC) that outputs a drive signal on a switch pin to control a switching operation of a switch that is coupled to a primary winding of a transformer. The primary-side controller IC places the switch pin at high impedance during a sense window and turns on the switch in response to sensing a dynamic detection signal on the switch pin during the sense window. The dynamic detection signal is induced by a secondary-side controller IC by controlling switching of a switch that is coupled to a secondary winding of the transformer when the output voltage drops below a predetermined threshold during standby or other low load conditions.

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Patent Owner(s)

Patent OwnerAddress
FAIRCHILD SEMICONDUCTOR CORPORATION5005 E MCDOWELL ROAD MAILDROP A700 PHOENIX AS 85008

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hsieh, Chih-Hsien Dacun, TW 15 99
Lin, Li Zubei, TW 102 524
Tao, Zhibo Palo Alto, US 26 455
Wang, Zhao-Jun San Jose, US 37 140

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