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SP4405UEB Datasheet

  • SP4405UEB

  • Low Voltage Electroluminescent Lamp Driver with Regulated Ou...

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  • SIPEX

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廬
SP4405
Low Voltage Electroluminescent Lamp Driver
with Regulated Output Voltage
s
+2.2V to +4.5V Battery Operation
s
DC-to-AC Converter Produces
160V
PP
typical for EL Display Panels
s
Single Resistor Controlled Internal
Oscillator
s
Low Current Standby Mode
s
Internal Feedback Loop Maintains
a Constant Regulated EL Lamp
Voltage Output
APPLICATIONS
s
Pagers
s
Cellular Phones
s
PDAs
DESCRIPTION
The
SP4405
is a high voltage output DC-AC inverter specifically designed to drive
electroluminescent lamps to backlight liquid crystal displays, keypads, and backlit readouts
used in battery operated portable equipment. The
SP4405
will operate from a +2.2V to +4.5V
battery source. The device features an internal feedback loop that regulates the lamp voltage
output to 160V
PP
(typical) with varying supply voltages to maintain constant EL lamp brightness
over the life of the battery. The device also has a low power shutdown mode which draws less
than 50nA (typical), ideal for low power portable products. One external inductor is required
to generate the high voltage AC output. One external resistor is used to set the internal
oscillator frequency. The
SP4405
is ideal for portable applications such as pagers, cellular
phones, PDAs, and other portable applications using LCDs in dim or low light environments.
The
SP4405
is offered in 8-pin SOIC and 8-pin
碌SOIC
packages.
V
BATTERY
ELEN 1
V
SS
2
COIL 3
EL1 4
SP4405
8 R
OSC
7 C
INT
6
5
V
DD
EL2
C1
0.1碌F
ELEN
1
L1
470碌H
SP4405
V
DD
R
OSC
450k鈩?/div>
6
3
COIL
*D1
1N4148
R
OSC
8
7
C
INT
C2
1nF
2
V
SS
4
EL1
5
EL2
C
INT
0.1碌F
EL Lamp
*optional device
SP4405DS/18
SP4405 Low Voltage Electroluminescent Lamp Driver
漏 Copyright 2000 Sipex Corporation
1

SP4405UEB相關(guān)型號PDF文件下載

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