SP4480DS/06

SP4480 Dual Electroluminescent Lamp Driver

© Copyright 2000 Sipex Corporation

1

s Backlights Keypad & LCD With A Single

El Driver

s A Single External IC Drives Dual EL

Lamps Simultaneously Or Independently

s A Single Coil Drives Both EL Lamp

s A Single Resistor Controls the Operating

Frequency

s DC-to-AC Inverter Produces Up To

200V

P-P

s Low Current Standby Mode Draws Less

Than 1

µA

DESCRIPTION

The SP4480 provides a designer with two electroluminescent lamp drivers for backlighting

solutions. The EL lamp outputs operate in opposite phase so he SP4480 device can be easily

implemented into applications driving two EL lamps simultaneously or driving double-sided,

multi-color EL lamps. The integration of a dual EL lamp driver in a cost-effective single IC

reduces component count and board space requirements. The SP4480 is ideal for portable

applications such as cellular phones, pagers, PDAs, medical equipment, and other designs

with liquid crystal displays, keypads, and backlit readouts. The SP4480 operates from a

+2.2V to +6.0V source. The device features a low power standby mode which draws less than

1

µA (maximum). The frequency of the internal oscillator is set with a single external resistor.

A single 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

ELEN1

ELEN2

no connect

EL2

EL1

EL3

1

2

3

4

11

12

13

14

no connect

no connect

5

6

7

EL4

COIL

8

9

10

CAP

SP4480

s +2.2V to +6.0V Battery Operation

Dual Electroluminscent Lamp Driver

SP4480