Low input voltage CCFL power supply
Fran Hoffart
Abstract
A low input voltage cold cathode fluorescent lamps (CCFL) power supply is described.
Keywords
CCFL power supply
LCD display
LT1513 switching regulator
Cold cathode fluorescent lamps (CCFLs) are often used to illuminate liquid crystal displays (LCDs). These displays appear in laptop computers, gas pumps, automobiles, test equipment, medical equipment and the like. The lamps themselves are small, relatively efficient and inexpensive, but they must be driven by specialized power supplies. High AC voltage (significantly higher than the operating voltage) is needed to start the lamp. A sinusoidal waveform is desired, the current must be regulated, efficiency should be ...
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