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SP4414UEB Datasheet

  • SP4414UEB

  • Low Cost Electroluminescent Lamp Driver

  • 14頁

  • SIPEX

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廬
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
碌SOIC
packages.
V
BATTERY
V
DD
7
L1
2.7mH
CLK 1
V
SS
2
EL2 3
COIL 4
SP4414
8 ELEN
7 V
DD
C1
10nF
SP4414
4
ELEN
8
5
CLK
1
2
V
SS
6
EL1
3
EL2
C
INT
100pF
COIL
*D1
1N4148
C
INT
6 EL1
5 C
INT
EL Lamp
*optional device
SP4414DS/17
SP4414 Electroluminescent Lamp Driver
漏 Copyright 2000 Sipex Corporation
1

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