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參數(shù)資料
| 型號(hào)： | SP4403UEB |
| 英文描述： | Low Voltage Electroluminescent Lamp Driver |
| 中文描述： | 低電壓電致發(fā)光燈驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 131K |
| 代理商： | SP4403UEB |
SP4403DS/05 SP4403 Electroluminescent Lamp Driver
Copyright 2000 Sipex Corporation
4
DESCRIPTION
The
SP4403
contains a DC-AC inverter that
can produce an AC output of 180V
from a
+2.2V to +4.5V input voltage. An internal block
diagram of the
SP4403
can be found in
Figure 1.
The
SP4403
is built on
Sipex's
dielectrically
isolated BiCMOS process that provides the
isolation required to separate the high voltage
AC signal used to drive the EL lamp from the
low voltage logic and signal processing circuitry.
This ensures latch-up free operation in the
interface between the low voltage CMOS
circuitry and the high voltage bipolar circuitry.
The
SP4403
is ideal for applications driving
EL lamps to backlight LCD displays, key
panels, and other backlit readouts used in
battery operated portable equipment.
A total of only six external components are
required for the standard operation of the
SP4403
: an inductor, a fast recovery diode,
three capacitors and a resistor. A diagram of the
SP4403
in a typical application can be found
in
Figure 2
.
Electroluminescent Technology
An EL lamp is basically a strip of plastic that is
coated with a phosphorous material which emits
light (fluoresces) when a high voltage (>40V)
which was first applied across it, is removed or
reversed. Long periods of DC voltages applied
to the material tend to breakdown the material
and reduce its lifetime. With these considerations
in mind, the ideal signal to drive an EL lamp is
a high voltage sine wave. Traditional approaches
to achieving this type of waveform included
discrete circuits incorporating a transformer,
transistors, and several resistors and capacitors.
Figure 1. Internal Diagram of the SP4403
f
COIL
f
LAMP
f
LAMP
FF7
Q
Q
L1
470
μ
H
EL Lamp
SCR1
SCR2
4
5
2
V
SS
C
INT
COIL
EL2
EL1
OSC
V
BATT
OSC
R
ELEN
SP4403
C1
0.1
μ
F
D1
1N4148
V
DD
6
R
OSC
8
3
7
1
optional device
C
1800pF
C2
10nF
*
*
*
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP4403 | Low Voltage Electroluminescent Lamp Driver |
| SP4403EU | Low Voltage Electroluminescent Lamp Driver |
| SP4405UEB | Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
| SP4405 | Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
| SP4405EN | Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP4405 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
| SP4405EN | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
| SP4405EU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
| SP4405NEB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
| SP4405UEB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage |
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