AC-DC converter circuit and power supply
First Claim
Patent Images
1. An AC-DC converter, comprising:
- a first capacitor and a second capacitor; and
a rectifier circuit connected to the first and second capacitor and operative to charge both the first and the second capacitor and to discharge the first capacitor independently of the second capacitor, wherein the AC-DC converter circuit provides a rectified output voltage, and current is drawn from the second capacitor only for a duration of time less than approximately 25% of each period of the rectified output voltage.
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Abstract
An AC-DC converter, comprises: a first capacitor and a second capacitor; and a rectifier circuit connected to the first and second capacitor and operative to charge both the first and the second capacitor and to discharge the first capacitor independently of the second capacitor. The AC-DC converter circuit provides a rectified output voltage, and a duration of time that a current is drawn from the second capacitor is less than approximately 25% of a period of the rectified output voltage.
370 Citations
20 Claims
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1. An AC-DC converter, comprising:
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a first capacitor and a second capacitor; and a rectifier circuit connected to the first and second capacitor and operative to charge both the first and the second capacitor and to discharge the first capacitor independently of the second capacitor, wherein the AC-DC converter circuit provides a rectified output voltage, and current is drawn from the second capacitor only for a duration of time less than approximately 25% of each period of the rectified output voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An AC-DC converter of a power supply, the AC-DC converter comprising:
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a first capacitor; a second capacitor, the first capacitor being configured to discharge independently of the second capacitor; and a rectifier circuit connected to the first and second capacitors, the rectifier circuit being configured to provide a rectified AC output voltage for charging the first and second capacitors, wherein current from the second capacitor is provided to a load when a voltage across the first capacitor drops below a threshold voltage level, and wherein the only portion of each period of the rectified AC output voltage over which the current is provided by the second capacitor is approximately 25% or less. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An AC-DC converter of a power supply, the AC-DC converter comprising:
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a first capacitor; a second capacitor, the first capacitor being configured to discharge independently of the second capacitor; and a rectifier circuit connected to the first and second capacitors, the rectifier circuit being configured to provide a rectified AC output voltage for charging the first and second capacitors, wherein the second capacitor is configured to charge during a first portion of each period of the rectified AC output voltage, to maintain charge during a second portion of each period of the rectified AC output voltage, and to discharge during a third portion of each period of the rectified AC output voltage when a voltage across the first capacitor drops below a threshold level, the third portion being approximately 25% or less of each period of the rectified AC output voltage. - View Dependent Claims (19, 20)
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Specification