Rev. 9/12/00

SP4490 Two Panel Electroluminescent Lamp Driver

© Copyright 2000 Sipex Corporation

1

s Single IC Drives 2 EL Lamps

Independently For Backlighting:

s Control Over Lamp-A & Lamp-B For

Independent Operation

s +2.2V to +6.0V Battery Operation

s Single Coil Used To Generate High

Voltage AC Outputs

s Low Power Standby Mode Draws 100nA

Typical Current

s A Single Resistor Controls the Internal

Oscillator

s DC-AC Inverter Produces Up To 220V

PP

s Space-Saving 10

µSOIC Package

DESCRIPTION

The SP4490 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. The SP4490 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 SP4490 can be easily implemented in applications driving multi-color or multi-segment

EL lamps. The SP4490 operates from a +2.2V to +6.0V battery source. The device features

a low power standby mode which draws less than 1

µA. 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

ELcommon

EL1

1

2

3

4

7

8

9

10

5

EL2

COIL

6

CAP

SP4490

EL1/EL2

ON/OFF

SP4490

Two Panel Electroluminscent Lamp Driver

APPLICATIONS

s Cellular Phones

s PDA's

s Handheld GPS Units

s Security Systems

s POS Terminals

®