SP4414DS/17

SP4414 Electroluminescent Lamp Driver

© Copyright 2000 Sipex Corporation

1

s Low Power +2.2V to +4.5V Battery

Operation

s Low-Cost EL Driver Ideal for LED

Backlighting Replacement

s DC-to-AC Inverter can Produce Over

160V

s Requires a 32kHz External Clock Signal

s Synchronize EL Driver Operation to

Existing System Clock for Portable

Applications (i.e. Pagers, Cellular

Phones, PDAs, etc.)

s Low Current Standby Mode

Low Cost Electroluminescent Lamp Driver

SP4414

DESCRIPTION

The SP4414 is a high voltage output DC-AC inverter specifically designed to drive electrolu-

minescent lamps to backlight liquid crystal displays, keypads, and backlit readouts used in

battery operated portable equipment. The SP4414 will operate from a +2.2V to +4.5 V battery

source. The device features a low power shutdown mode which draws less than 100nA (typical),

ideal for low power portable products. One external inductor is required to generate the high

voltage AC output. An external clock signal is used to drive the internal control signals for the

coil and EL lamp. The SP4414 is ideal for portable applications such as pagers, cellular

phones, PDAs, and other portable applications using LCDs in dim or low light environments.

The SP4414 is offered in 8-pin SOIC and 8-pin

µSOIC packages.

CLK

EL2

COIL

EL1

ELEN

SP4414

8

7

4

3

2

1

5

6

COIL

SP4414

C1

10nF

L1

2.7mH

4

7

8

5

2

ELEN

*D1

1N4148

100pF

*optional device

EL2

EL1

EL Lamp

3

6

1

CLK

®