Electroluminescent Lamp Drivers for Backlighting Applications
Micrel Inc. launched its MIC4830 and MIC4832 series of 180 Vpp and 220 Vpp low noise electroluminescent lamp (EL) drivers that drive panels of up to 4 sq. in. or greater. Applications include mobile phones, PDAs, pagers, calculators, multimedia players and remote controls. High efficiency is achieved by consuming a typical supply current of 45 mA. The ICs integrate a high voltage boost converter and an H-bridge driver for driving a large EL lamp. Their design eliminates audible noise in both products by creating a smoother AC waveform across the EL panel. Operating from an input voltage range of 1.8V to 5.5V, the devices offer flexibility via externally adjustable lamp and boost converter frequencies.
Micrel, Inc., 408-944-0800, www.micrel.com