SP4414 Datasheet, PDF (1/14 Pages) Sipex Corporation – Low Cost Electroluminescent Lamp Driver

®
SP4414
Low Cost Electroluminescent Lamp Driver
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_PP for EL Lamps
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
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.
VBATTERY
CLK 1
V_SS 2
EL2 3
COIL 4
SP4414
8 ELEN
7 V_DD
6 EL1
5 C_INT
C1
10nF
VDD ₇
ELEN
CLK
SP4414
4
COIL
8
1
2
5
CINT
63
VSS
EL1
EL2
L1
2.7mH
*D1
1N4148
CINT
100pF
EL Lamp
*optional device
SP4414DS/17
SP4414 Electroluminescent Lamp Driver
1
© Copyright 2000 Sipex Corporation