Rev. 12/19/00

SP4491 Two Panel Electroluminescent Lamp Driver

© Copyright 2000 Sipex Corporation

1

s Single IC Drives 2 EL Lamps

For Backlighting:

s Control Over Lamp-A & Lamp-B For

Independent Or Concurrent 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 10MSOP Package

DESCRIPTION

The SP4491 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 SP4491 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 SP4491 can be easily implemented in applications driving multi-color

or multi-segment EL lamps. The SP4491 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

SP4491

Two Panel Electroluminscent Lamp Driver

APPLICATIONS

s Cellular Phones

s PDA's

s Handheld GPS Units

s Security Systems

s POS Terminals

ELcommon

EL1

1

2

3

4

7

8

9

10

5

EL2

COIL

6

CAP

SP4491

ELEN1

ELEN2

®