Selecting a driver architecture for white LEDs used in LCD backlighting requires consideration of the desired TV features, the available dc system voltages, and the manufacturing tolerances of the LEDs themselves.
Using a driver circuit based on a specialized buck controller, a white LED with integrated heatsink can replace a 10-W halogen bulb in MR16 lamps.
The popular Xenon photoflash bulb is typically driven by
a battery-powered high-voltge source. A flyback converter
based on peak current limiting is the best option for this
circuit in portable applications.
An 8-bit microcontroller can implement the essential
functions of an electronic ballast for HID or fluorescent
lamps, while enabling many desirable features.
Light-emitting diodes (LEDs) are often used with a voltage source from a power-supply output voltage. The output voltage increases until the current through the LEDs reaches the value of the constant-current source from the power supply. Also, a...
The capabilities of SPICE3 permit the simulation
of circuits incorporating the latest ICs by way of
special algorithms and modeling techniques.