SP4428DS/16

SP4428 Electroluminescent Lamp Driver

© Copyright 2000 Sipex Corporation

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DESCRIPTION

The SP4428 is a high voltage output DC-AC converter that can operate from a single 1.5 VDC

power supply. The SP4428 is capable of supplying 200 V

electroluminescent lamps. The device features 1

µA (typical) 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 produce a clock signal that generates the coil

and lamp frequencies. The SP4428 is ideal for PDAs, pagers, and other low power portable

applications using LCDs in dim or low light environments. The SP4428 is offered in an 8-pin

narrow SOIC. For delivery in die form, please consult the factory.

s Low Power +1.1V to +1.7V Single

Cell Operation

s Low-Cost EL Driver Ideal for Backlighting

s DC-to-AC Inverter Generates High

Voltage AC to Drive EL Lamps

s Externally Adjustable Oscillator

s Low Current Standby Mode

APPLICATIONS

s Pagers

s Watches

s Backlit LCD Displays

SP4428

Electroluminescent Lamp Driver

High Drive Capability for Low Voltage Applications

Block Diagram

HON

D1

COIL

EL2

EL1

SP4428

8

7

4

3

2

1

5

6

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