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US 7,202,653 B2Granted
High efficiency power converter
AssigneeRichtek Technology Corporation
InventorChung-Lung Pai
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Abstract
A high efficiency power converter comprises a boost converter for converting an input voltage to a first voltage on a first output, a buck converter for converting the input voltage to a second voltage on a second output, a linear regulator for converting the first voltage to a third voltage on the second output when the second voltage is lower than a first threshold, and a voltage detector for detecting the input voltage for preventing a reverse current flowing from the second output to the buck converter when the input voltage is lower than a second threshold.
Claims5
A high efficiency power converter comprising:
- a boost converter for converting an input voltage to a first voltage on a first output;
- a buck converter concurrently operable with the boost converter to convert the input voltage to a second voltage on a second output, the second voltage being different in value from the first voltage;
- a linear regulator coupled between the first and second outputs for converting the first voltage to a third voltage on the second output when the second voltage is lower than a first threshold;
- and
- a voltage detector for detecting the input voltage for preventing a reverse current flowing from the second output to the buck converter when the input voltage is lower than a second threshold.
2 more elements
Dependencies are inferred from the claim text.