POWER CONVERSION UNIT FOR LED LIGHTING
First Claim
Patent Images
1. A power conversion circuit, comprising:
- an AC power input line;
a bridge rectifier;
a first capacitor, connected between a first leg of the AC power input line and a first input of the bridge rectifier;
a first DC output line, connected to a first output of the bridge rectifier; and
a second DC output line, connected to a second output of the bridge rectifier,wherein the first capacitor and the bridge rectifier are selected to provide a predetermined variable voltage substantially constant DC current on the first and second DC output lines.
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Abstract
A power conversion unit converts an AC voltage into substantially constant DC current. The power conversion unit can be placed into an end cap of an LED lighting unit, to power LED modules. The power conversion unit uses capacitors and a bridge rectifier to perform the power conversion. The capacitors and bridge rectifier are selected to configure the power conversion and to produce the desired variable voltage substantially constant DC current.
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Citations
25 Claims
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1. A power conversion circuit, comprising:
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an AC power input line; a bridge rectifier; a first capacitor, connected between a first leg of the AC power input line and a first input of the bridge rectifier; a first DC output line, connected to a first output of the bridge rectifier; and a second DC output line, connected to a second output of the bridge rectifier, wherein the first capacitor and the bridge rectifier are selected to provide a predetermined variable voltage substantially constant DC current on the first and second DC output lines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lighting module, comprising:
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a housing comprising; a channel having a longitudinal opening; and a lens adapted to cover the opening; a light emitting diode (LED) module adapted for positioning within the channel, comprising; a plurality of LEDs mounted on one or more circuit boards; and a power conversion circuit board, adapted for positioning in the housing, the power conversion circuit board comprising; an AC power input line, adapted for connection to an AC power source; a bridge rectifier; a first capacitor, connected between a first leg of the AC power input line and a first input of the bridge rectifier; and a first DC output line, connected to a first output of the bridge rectifier and adapted for connection to the LED module, wherein the first capacitor and the bridge rectifier are selected to provide a predetermined variable voltage substantially constant DC current on the first and second DC output lines. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method comprising:
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electrically connecting a first leg of an AC power line to a first capacitive circuit; electrically connecting the capacitive circuit to a first input of a bridge rectifier; providing a predetermined variable voltage substantially constant DC current on a first output of the bridge rectifier; and selecting the capacitance of the first capacitive circuit and selecting the bridge rectifier based on the predetermined variable voltage substantially constant DC current to be provided. - View Dependent Claims (24, 25)
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Specification