Two Panel Electroluminescent Lamp Driver [NOT FOR NEW DESIGN!!]

Add Favorites


The ZSP4491 electroluminescent lamp driver provides designers of cell phones PDA’s and other handheld, portable electronic devices with an integrated solution for driving two EL lamps independently or concurrently. The ZSP4491 is designed with our proprietary high voltage BiCMOS technology. The ZSP4491 reduces system cost, component count and board space requirements over a discrete 2-EL driver approach. The EL lamps operate in opposite phase so the ZSP4491 can be easily implemented in applications driving multi-color or multi-segment EL lamps. The ZSP4491 operates from a +2.2V to +5.0V battery source. The device features a low power standby mode which draws less than 1mA. The frequency of the internal oscillator is set using a single external resistor. A single external inductor is required to generate the high voltage AC outputs to drive the EL lamps. All input pins are ESD protected with internal diodes to V DD and VSS.


● Single IC drives 2 EL lamps for backlighting:
-- Cell phone keypad and LCD
-- Multi-color EL lamps
-- Multi-segment EL lamps
● Control over lamp-A and lamp-B for independent or concurrent operation
● +2.2V to +5.0V battery operation
● Single coil used to generate high voltage AC outputs
● Low power standby mode draws 100nA typical current
● A single resistor controls the internal oscillator
● DC-AC inverter produces up to 220Vpp
● Space-saving 10-pin MSOP package

Target Applications

Cellular phones
EL keypads & dashboards
Handheld GPS units
Security systems
POS terminals



Technical Documentation

Product Brief, Product Introduction and Datasheet

ZSP4491 Product Brief

Release Date

File Size
337.3 KB

ZSP4491 Datasheet


Release Date

File Size
1.0 MB