Control method to avoid capacitive mode switching for resonant converters

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United States of America Patent

PATENT NO 9837913
SERIAL NO

15425195

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Abstract

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A resonant power converter is provided with capacitive switching mode protection. The converter produces output current and voltage according to an operating frequency, which is desirably maintained above a resonant frequency for the power converter. A controller regulates the operating frequency based on an output current relative to a reference value, which may be provided via a dimming interface. A capacitive switching mode is determinable, based on a positive relationship in a detected direction of change in an output value relative to a detected direction of change in the operating frequency. When the capacitive switching mode is determined, a preceding operating frequency is enacted and the controller disables regulation of the operating frequency therefrom. Inductive mode switching is determinable with a negative relationship between detected direction of change in the output value relative to direction of change in the operating frequency, wherein regulation of operating frequency is renewed.

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Patent Owner(s)

Patent OwnerAddress
UNIVERSAL LIGHTING TECHNOLOGIES INC1430 WALL TRIANA HIGHWAY MADISON AL 35756

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Xiong, Wei Madison, US 392 2700

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