MINIMAL COMPONENT HIGH VOLTAGE CURRENT LIMITED AC DIMMABLE LED DRIVER
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Abstract
This invention is suitable for directly driving from an alternating current (AC) line voltage source an array of LED lamps with a minimal amount of ancillary circuitry. Most of the required circuitry is situated within an integrated circuit, which includes a full wave rectifier, transient protection, a current control transistor, a feedback control loop, and overheating protection. The integrated circuit powers a transistor circuit structured as a constant current source to energize individual groupings of LEDs, as well as larger configurations of LEDs. The invention is useful for various lighting arrangements such as luminaires, bollards, strip lights, task lights, lighting tubes, and other types of applications that use a multitude of LEDs powered directly by AC line voltage without the requirement of a direct current power supply. This invention may further be used with an external phase switching dimmer apparatus.
15 Citations
30 Claims
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1-20. -20. (canceled)
- 21. An improved lighting system comprising a plurality of integrated circuit modules serially connected to a single power module, each integrated circuit module also connected to an LED array and further including a dedicated full wave rectifier element, a thermal protection element, and a surge protection element, all of said elements being internal to and an integral part of each integrated circuit module wherein said serially connected integrated circuit modules providing enhanced scalability not constrained by use of a single full bridge rectifier as a lighting system power source.
Specification