SP4426DS/01

SP4426 Electroluminescent Lamp Driver

© Copyright 1997 Sipex Corporation

1

SP4426

Electroluminescent Lamp Driver

with High Output Drivers

s 2.2V-6.0V Battery Operation

s DC to AC Inverter for EL Backlit

Display Panels

s Externally Adjustable Internal Oscillator

s Low Current Standby Mode

APPLICATIONS

s HPC's s PDA's s Pen Tablets

s Backlit LCD Displays

DESCRIPTION…

The SP4426 is a high voltage output DC-AC converter that can operate from a 2.2V-6.0V

power supply. The SP4426 is capable of supplying up to 300 Vpp signals, making it ideal for

driving electroluminescent lamps. The device features 100 nA (typ) standby current, for use

in low power portable products. One external inductor is required to generate the high voltage

charge, and one external capacitor is used to select the oscillator and Lamp frequencies. The

SP4426 is offered in a 14 pin narrow SOIC. For delivery in die form, please consult the factory.

1

11

VDD

HON

H

Bridge

COIL

EL1

EL2

12

VSS

3

8

7

5

CAP2

8 Bit Counter

EN

CAP2

6

D1

14

CAP1

CAP1

Block Diagram