LED LIGHT SOURCE WITH MULTIPLE INDEPENDENT CONTROL INPUTS AND INTEROPERABILITY
First Claim
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1. A light emitting diode (LED) light source comprising:
- an LED;
a controller having a plurality of control inputs with an internal switch for low speed control responsive to the control inputs; and
,a power switching circuit responsive to the internal switch in the controller for high speed control of current to the LED.
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Abstract
An LED lighting control system incorporating a control IC for fast control of LED current in a switching Buck-type power supply through dedicated power supply control hardware with slow changing signals of temperature and input under control of firmware. The control IC optimizes the use of power from the source and optimizes the operating efficiency of the LED output while providing for a plurality of LED devices to be powered in parallel by a single controller.
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Citations
17 Claims
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1. A light emitting diode (LED) light source comprising:
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an LED; a controller having a plurality of control inputs with an internal switch for low speed control responsive to the control inputs; and
,a power switching circuit responsive to the internal switch in the controller for high speed control of current to the LED. - View Dependent Claims (2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 15)
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8. The LED light source as defined in claim I wherein the power switching circuit comprises:
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a power switch connected to the internal switch; an inductor connected intermediate the power switch and the LED; and
,a diode to ground connected intermediate the power switch and the inductor; and
further comprising;a current sensor detecting current through the LED and providing an output to a first comparator in the controller having an upper set point and a second comparator in the controller having a lower set point for modulation of the internal switch. - View Dependent Claims (9)
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16. A method for LED light source control comprising:
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receiving a control input; operating an internal switch responsive to the control input providing power through a high speed circuit having power switch responsive to the internal switch and connected through an inductor and a diode for current supply to an LED; measuring current through the LED; comparing measured current to a first threshold and upon reaching the first threshold providing a signal through the internal switch turning off the power switch; comparing measured current to a second threshold and upon reaching the second threshold turning providing a signal through the internal switch turning on the power switch. - View Dependent Claims (17)
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Specification