Methods and apparatus for high power factor controlled power delivery using a single switching stage per load
First Claim
1. A lighting apparatus, comprising:
- at least a first load that includes at least one first LED-based light source; and
a switching power supply including a first single switching stage for the first load, the switching power supply configured to provide power factor correction and a first load power to the first load via control of the first single switching stage, wherein the switching power supply further is configured to control the first single switching stage to provide the first load power without monitoring or regulating a first load current or a first load voltage associated with the first load.
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Accused Products
Abstract
Methods and apparatus for high power factor power transfer to a load using a single switching stage. In exemplary implementations, a controllable variable power may be delivered to a load using a single switching stage while maintaining high power factor, in some cases without requiring any feedback information relating to the load conditions (i.e., without monitoring load voltage and/or current) to control normal switching operations in the single switching stage, and without requiring regulation of load voltage and/or load current. In one example, a single stage high power factor driver is used to control power delivery to an LED-based light source.
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Citations
47 Claims
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1. A lighting apparatus, comprising:
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at least a first load that includes at least one first LED-based light source; and
a switching power supply including a first single switching stage for the first load, the switching power supply configured to provide power factor correction and a first load power to the first load via control of the first single switching stage, wherein the switching power supply further is configured to control the first single switching stage to provide the first load power without monitoring or regulating a first load current or a first load voltage associated with the first load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A lighting method, comprising acts of:
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A) generating first light from a first load including at least one first LED-based light source; and
B) providing power factor correction and a first load power to the first load via control of a first single switching stage without monitoring or regulating a first load current or a first load voltage associated with the first load. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification