BRIEF DESCRIPTION OF THE DRAWINGS
For a more complete understanding of the present invention and for further features and advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram in partial block form of a system for driving a load, such as, one or more light emitting diodes (LEDs).
FIG. 2 is a chart illustrating the efficiency of the system of FIG. 1 versus the value of the voltage supply.
FIGS. 3A through 3C are schematic diagrams of various implementations for a modulation error attenuation component.
FIGS. 4A through 4C are schematic diagrams of various implementations for a power stage component.
FIG. 5 is a schematic diagram for an adaptive mode change component.
FIGS. 6A and 6B are state diagrams for various implementations of a state machine used to implement logic for controlling operating modes.
FIGS. 7A and 7B are timing diagrams for mode changes of various implementations.
FIG. 8 is a schematic diagram for a Vds reference generator component.
FIG. 9 is a diagram for a pin-out of an integrated circuit device for driving one or more LEDs.
FIG. 10 is a truth table for LED control signals.
FIGS. 11A through 11C are charts illustrating adaptive mode change.
Patent Application
20070205823
