Patent ID: 9144126
Filing Date: 2015-09-22
Classification: H05B

Abstract:
1. An electronic circuit for use in driving a plurality of light emitting diode (LED) channels coupled to a common voltage node, each LED channel in the plurality of LED channels including a series-connected string of LEDs, the electronic circuit comprising: a control circuitry for controlling a DC-DC converter to generate a regulated voltage on the common voltage node, the control circuitry to set a duty cycle of the DC-DC converter based on voltage requirements of a dominant LED channel; a memory to store a priority queue that lists LED channels and tracks priorities of LED channels in the plurality of LED channels, wherein a highest priority LED channel in the priority queue represents the dominant LED channel; and a queue manager to continually update the priority queue based on operating conditions associated with the plurality of LED channels, wherein the queue manager is configured to move an LED channel from a lower priority in the priority queue to the highest priority in the priority queue if the queue manager determines that the LED channel requires an increase in voltage on the common voltage node.