The IMP525 is an Electroluminescent (EL) lamp driver designed for systems that must operate below 1 volt. The input supply voltage range is 0.9V to 2.5V. Typical output lamp drive voltage is 112V. All four EL lampdriving functions are on-chip. These are the switch-mode power supply, its high-frequency oscillator, the high-voltage H-bridge lamp driver and its low-frequency oscillator. EL lamps of up to 6nF capacitance can be driven to high brightness.

Key Features

◆ Wide operating voltage range - from 0.9V to 2.5V

◆ Simple design requires few passive components

◆ 112V peak-to-peak typical AC output voltage

◆ Adjustable output frequency controls lamp color and power consumption

◆ Adjustable converter frequency minimizes circuit power consumption

◆ Disable mode extends battery life

◆ Disable current under 2µA

◆ Compact MicroSO package option

Applications

◆ Audio/TV remote control units

◆ Pagers/Cellular phones

◆ PDAs

◆ Clocks and radios

◆ Portable GPS receivers

◆ LCD modules

◆ Toys