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SP4405 PDF预览

SP4405

更新时间: 2024-10-29 22:21:31
品牌 Logo 应用领域
西伯斯 - SIPEX 驱动器
页数 文件大小 规格书
20页 162K
描述
Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage

SP4405 数据手册

 浏览型号SP4405的Datasheet PDF文件第2页浏览型号SP4405的Datasheet PDF文件第3页浏览型号SP4405的Datasheet PDF文件第4页浏览型号SP4405的Datasheet PDF文件第5页浏览型号SP4405的Datasheet PDF文件第6页浏览型号SP4405的Datasheet PDF文件第7页 
®
SP4405  
Low Voltage Electroluminescent Lamp Driver  
with Regulated Output Voltage  
+2.2V to +4.5V Battery Operation  
DC-to-AC Converter Produces  
160VPP typical for EL Display Panels  
Single Resistor Controlled Internal  
Oscillator  
Low Current Standby Mode  
Internal Feedback Loop Maintains  
a Constant Regulated EL Lamp  
Voltage Output  
APPLICATIONS  
Pagers  
Cellular Phones  
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 160VPP (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 µSOIC packages.  
VBATTERY  
1
ELEN  
1
2
3
8
ROSC  
ELEN  
VSS  
L1  
470µH  
SP4405  
VDD  
COIL  
CINT  
6
8
3
7
7 CINT  
SP4405  
ROSC  
450kΩ  
*D1  
1N4148  
ROSC  
6
COIL  
VDD  
CINT  
0.1µF  
C1  
0.1µF  
C2  
1nF  
2
4
5
EL1 4  
5
EL2  
VSS  
EL1  
EL2  
EL Lamp  
*optional device  
SP4405DS/18  
SP4405 Low Voltage Electroluminescent Lamp Driver  
© Copyright 2000 Sipex Corporation  

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