Digitally controlled current regulator for high power solid state lighting
First Claim
1. An apparatus for controlling current to solid state lighting, the apparatus comprising:
- a memory configured to store a plurality of parameters including a predetermined minimum current level parameter and a predetermined peak current level parameter;
an inductor coupled to the solid state lighting;
a controller coupled to the memory, wherein the controller is configured to;
control a power source to supply current to the inductor to start an energizing cycle;
monitor a current level of the inductor;
reduce the inductor current level in response to the inductor current level reaching the predetermined peak current level parameter; and
increase the inductor current level in response to the inductor current level reaching the predetermined minimum current level parameter to start a next energizing cycle.
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Accused Products
Abstract
A representative apparatus controls current supplied to solid state lighting, such as light emitting diodes. The apparatus includes an inductor, a memory adapted to store a plurality of current parameters and a controller. The controller is configured to control a power source to supply current to the inductor to start an energizing cycle, monitor an inductor current level, reduce the inductor current level in response to the inductor current level reaching a predetermined peak inductor current, and increase the inductor current level in response to the inductor current reaching a predetermined minimum current is reached. In at least one embodiment, the controller modulates a current provided to the solid state lighting such that a DC average current level is substantially proportional to one-half of a sum of the predetermined peak current level and the predetermined minimum current level.
5 Citations
20 Claims
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1. An apparatus for controlling current to solid state lighting, the apparatus comprising:
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a memory configured to store a plurality of parameters including a predetermined minimum current level parameter and a predetermined peak current level parameter; an inductor coupled to the solid state lighting; a controller coupled to the memory, wherein the controller is configured to; control a power source to supply current to the inductor to start an energizing cycle; monitor a current level of the inductor; reduce the inductor current level in response to the inductor current level reaching the predetermined peak current level parameter; and increase the inductor current level in response to the inductor current level reaching the predetermined minimum current level parameter to start a next energizing cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for controlling current to solid state lighting, the apparatus comprising:
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an inductor coupled to the solid state lighting; means for storing a plurality of parameters including a predetermined minimum current level parameter and a predetermined peak current level parameter; means for starting an energizing cycle by supplying current to the inductor from a power source; means for monitoring a current level of the inductor; means for reducing the inductor current level in response to the inductor current level reaching the predetermined peak current level parameter; and means for increasing the inductor current level in response to the inductor current level reaching the predetermined minimum current level parameter to start a next energizing cycle. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification