INDUCTOR CURRENT EMULATION FOR OUTPUT CURRENT MONITORING

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United States of America Patent

APP PUB NO 20170346385A1
SERIAL NO

15582951

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A switch mode power supply controller includes a switch terminal adapted to be coupled to an inductor that drives a load, high- and low-side switches a pulse width modulation (PWM) circuit, and a current monitor circuit. The PWM circuit is coupled to a feedback terminal for receiving a feedback signal, and alternatively drives the high-side switch and the low-side switch with a duty cycle set using the feedback signal to regulate an output voltage to a desired level in a work mode, and keeps both the high-side switch and the low-side switch non-conductive in a non-work mode. The current monitor circuit provides a current monitor signal representative of a current driven from the inductor to the load, wherein the current monitor circuit forms the current monitor signal by measuring an inductor current during a work mode, and by emulating the inductor current during a non-work mode.

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Patent Owner(s)

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

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
GU, Ming San Jose, US 31 301
LIANG, Enzhu Sunnyvale, US 10 97
YAO, Kaiwei San Jose, US 44 723

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