Lighting device power control circuit systems and methods
AssigneeSureFire, LLC
InventorsWilliam A. Hunt, William D. Wells
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Abstract
A lighting device power control circuit configured to charge one or more capacitors through the pulsing of an inductor is provided. In one example, a lighting device includes a light source and a power control circuit. The power control circuit comprises an inductor, a power transistor configured to pass an operating current associated with the light source, and one or more capacitors configured to keep the power transistor turned on to pass the operating current. The one or more capacitors are configured to be periodically charged in response to a voltage spike generated across the inductor. Related methods and additional embodiments are also provided.
Claims20
A lighting device comprising:
- a light source;
- and
- a power control circuit comprising:
- an inductor,
- a power transistor configured to pass an operating current associated with the light source, and
- one or more capacitors configured to keep the power transistor turned on to pass the operating current, wherein the one or more capacitors are configured to be periodically charged in response to a voltage spike generated across the inductor.
A method comprising:
- activating a light source of a lighting device comprising:
- the light source, and
- a power control circuit comprising an inductor, a power transistor, and one or more capacitors;
- passing, by the power transistor, an operating current associated with the light source;
- periodically generating a voltage spike across the inductor;
- and
- charging the one or more capacitors in response to the voltage spike to keep the power transistor turned on to continue the passing.
Dependencies are inferred from the claim text.