A svelte beast cuts high voltage down to size

摘要

Piezoceramic transformers have many features, including small form factor, that make them inherently well-suited to ccfl-backlight inverters. Lcds are in use everywhere, from PCs of all sizes to point-of-sale terminals to instruments, autos, and medical apparatus. LCDs use a cold-cathode fluorescent lamp (CCFL) as a light source to backlight the display. The CCFL requires a high-voltage ac supply for operation. Typically, more than 1000V rms are necessary to initiate lamp operation, with sustaining voltages of 200 to 800V ac.