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參數(shù)資料
| 型號(hào)： | SP4491EU |
| 英文描述： | Two Panel Electroluminscent Lamp Driver |
| 中文描述： | 兩個(gè)小組Electroluminscent燈驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 5/13頁(yè) |
| 文件大小： | 155K |
| 代理商： | SP4491EU |
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Rev. 12/19/00
SP4491 Two Panel Electroluminescent Lamp Driver
5
Copyright 2000 Sipex Corporation
DESCRIPTION
The SP4491 electroluminescent lamp driver pro-
vides designers of cell phones, PDA's and other
handheld, portable electronic devices with an
integrated solution for driving two EL lamps
independently or stimultaneously. The SP4491
reduces system cost, component count and board
space requirements over a discrete 2 EL driver
approach. The EL lamps operate in opposite
phase so the SP4491 can be easily implemented
in applications driving multi-color or multi-seg-
ment EL lamps. The SP4491 operates from a
+2.2V to +6.0V battery source. The device
features a low power standby mode that draws
less than 1
μ
A. The frequency of the internal
oscillator is set using a single external resistor. A
single external inductor is required to generate
the high voltage AC outputs to drive the EL
lamps. All input pins are ESD protected with
internal diodes to V
DD
and V
SS
.
The SP4491 contains a DC-AC inverter that can
produce an AC output of 180V
(typical) from
a 3.0V input voltage. An internal block diagram
of the SP4491 can be found in Figure 1.
Electroluminescent Technology
An EL lamp consists of a thin layer of phospho-
rous material sandwiched between two strips of
plastic which emits light (flouresces) when a
high voltage AC signal is applied across it. It
behaves primarily as a capacitive load. Long
periods of DC voltage applied to the material
tend to reduce its lifetime. With these conditions
in mind, the ideal signal to drive an EL lamp is a
high voltage sine wave. Traditional approaches
to achieve this type of waveform include discrete
circuits incorporating a transformer, transistors
and several resistors and capacitors.
This approach is large and bulky and cannot be
implemented in most handheld equipment. Sipex
offers low power single chip driver circuits spe-
cifically designed to drive small to medium sized
electroluminescent panels. Sipex EL drivers
provide a differential AC voltage without a DC
offset to maximize EL lamp lifetime. The only
additional components required for the EL driver
circuitry are an inductor, resistor and capacitor.
Figure 2: Typical Application Circuit of SP4491
R
OSC
V
SS
COIL
CAP
SP4491
V
BATT
C1
0.1
μ
F
R
OSC
464k
L1
470
μ
H
6
2
3
1
7
5
ELEN1
D1
1N4148
C
1800pF
V
DD
ELcommon
EL1
EL Lamp
9
10
C2*
1nF
4
ELEN2
* optional device
EL2
8
EL Lamp
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP4491UEB | Two Panel Electroluminscent Lamp Driver |
| SP4501EY | EL Plus Piezo Driver |
| SP4501NEB | EL Plus Piezo Driver |
| SP4501 | EL Plus Piezo Driver |
| SP4501EN | EL Plus Piezo Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP4491UEB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Two Panel Electroluminscent Lamp Driver |
| SP-45/4 | 制造商:Distributed By MCM 功能描述:3'' Full Range Speaker - 4 ohm |
| SP45001 | 制造商:SIPAT 制造商全稱:SIPAT 功能描述:450MHz Low-loss SAW Filter 45MHz Bandwidth |
| SP-450-033-03 | 功能描述:DISPLAY PLASMA CHARACTER 15DIGIT RoHS:否 類別:光電元件 >> 顯示器模塊 - LCD，OLED 字符和數(shù)字 系列:- 產(chǎn)品培訓(xùn)模塊:NHDev LCD Development Board 產(chǎn)品變化通告:LCD Modules 3.0V Obsolescence 3/Nov/2011 標(biāo)準(zhǔn)包裝:50 系列:NHD-0416B1Z-F 顯示器類型:STN - 超扭轉(zhuǎn)向列 顯示模式:穿透/反射式 數(shù)字/字母數(shù):64 外形L x W x H:87.00mm x 60.00mm x 14.00mm 可視范圍:61.80mm L x 25.20mm W 背光:LED - 綠 顯示格式:16 x 4 字符尺寸:4.75mm H x 2.95mm W 字符格式:5 x 8 點(diǎn) 電源電壓:5.0V 點(diǎn)尺寸:0.55mm W x 0.55mm H 接口:- 工作溫度:-20°C ~ 70°C |
| SP-450-034-02 | 功能描述:DISPLAY PLASMA CHARACTER 5DIGIT RoHS:否 類別:光電元件 >> 顯示器模塊 - LCD，OLED 字符和數(shù)字 系列:- 產(chǎn)品培訓(xùn)模塊:NHDev LCD Development Board 產(chǎn)品變化通告:LCD Modules 3.0V Obsolescence 3/Nov/2011 標(biāo)準(zhǔn)包裝:50 系列:NHD-0416B1Z-F 顯示器類型:STN - 超扭轉(zhuǎn)向列 顯示模式:穿透/反射式 數(shù)字/字母數(shù):64 外形L x W x H:87.00mm x 60.00mm x 14.00mm 可視范圍:61.80mm L x 25.20mm W 背光:LED - 綠 顯示格式:16 x 4 字符尺寸:4.75mm H x 2.95mm W 字符格式:5 x 8 點(diǎn) 電源電壓:5.0V 點(diǎn)尺寸:0.55mm W x 0.55mm H 接口:- 工作溫度:-20°C ~ 70°C |
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