Voltage converter with combined buck converter and capacitive voltage divider

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United States of America Patent

PATENT NO 8427113
APP PUB NO 20090033289A1
SERIAL NO

12178050

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Abstract

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A voltage converter including a buck converter and a capacitive voltage divider. The converter includes four capacitors, a switch circuit, an inductor and a controller. A first capacitor is coupled between a reference node and a first output node which develops a first output voltage. A second capacitor is coupled between an input node and either the reference node or the first output node. The switch circuit couples a third capacitor between the reference and first output nodes in a first state of a PWM signal, and couples the third capacitor between the first output and input nodes in a second PWM signal state. The inductor is coupled to the third capacitor and provides a second output node coupled to the fourth capacitor providing a second output voltage. The controller controls the duty cycle of the PWM signal to regulate the second output voltage to a predetermined level.

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Patent Owner(s)

Patent OwnerAddress
INTERSIL AMERICAS LLC1001 MURPHY RANCH ROAD MILPITAS CA 95035

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Miller, Greg J Cary, US 6 128
Xing, Kun Cary, US 21 344

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