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US 2013/0258722 A1Published application
Phase-cut pre-regulator and power supply comprising the same
AssigneeFairchild Korea Semiconductor Ltd.
InventorsCharlie WANG, Sang Cheol MOON, Young-Bae PARK
Life of this patent
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Abstract
A power supply includes a phase-cut pre-regulator. The phase-cut pre-regulator comprises a switching device connected between a line voltage and an input voltage of a bulk capacitor and a comparator receiving the line voltage and a reference voltage, comparing the line voltage with hysteresis reference voltages based on the reference voltage, and switching the switching device according to the compared result.
Claims20
A phase-cut pre-regulator comprising:
- a switching device connected between a line voltage and an input voltage of a bulk capacitor;
- and
- a comparator receiving the line voltage and a reference voltage, comparing the line voltage with a plurality of hysteresis reference voltages that are based on the reference voltage, and switching the switching device according to a result of comparing the line voltage with the plurality of hysteresis reference voltages.
A power supply comprising:
- a rectifier circuit rectifying an AC input to generate a line voltage;
- a bulk capacitor;
- a switching device connected between the rectifier circuit and the bulk capacitor;
- and
- a comparator receiving the line voltage and a reference voltage, comparing the line voltage with a plurality of hysteresis reference voltages that are based on the reference voltage, and switching the switching device according to a result of comparing the line voltage with the plurality of hysteresis reference voltages.
2 more elements
A power supply comprising:
- a first rectifier circuit rectifying a first phase AC input of a multi-phase AC input to generate a first line voltage;
- a bulk capacitor;
- a first switching device connected between the first line voltage and the bulk capacitor;
- and
- a first comparator receiving the first line voltage and a reference voltage, comparing the first line voltage with a plurality of hysteresis reference voltages that are based on the reference voltage, and switching the first switching device according to a result of comparing the first line voltage with the plurality of hysteresis reference voltages.
2 more elements
Dependencies are inferred from the claim text.