SIMO converters that generate a light output

摘要

A power converter includes a single magnetic element in communication with a plurality of output channels. Each output channel includes one or more light-emitting diodes (LEDs) that may output a desired light output. Desired amounts of current may be discharged from the single magnetic element through the LEDs to generate the desired light output. The current may be drawn through the LEDs by switching “on” and “off” switches connected to the LEDs. A controller in communication with the power converter may generate switching signals to turn “on” and “off” the switches to draw the desired amounts of current. The controller may measure the current and determine whether to adjust the switching signals if the measured current draw is not the desired current draw in order to generate the desired light output from the LEDs.

主权项

1. A system comprising:
a power converter comprising:
a single magnetic element;a first switch configured to control charging and discharging of the single magnet element;a plurality of output loads in communication with the single magnetic element, the plurality of output loads configured to draw current discharged from the single magnetic element; andat least one second switch connected in series with at least one output load of the plurality of output loads, wherein switching of the at least one second switch controls current draw through the at least one output load,wherein the plurality of output loads are configured to output a predetermined light output; and a controller in communication with the power converter, wherein the controller is configured to:
determine a difference in current draw between a measured current draw and a predetermined current draw; andcontrol current conduction through the power converter to generate the predetermined light output based on the difference in current draw.