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參數(shù)資料
| 型號(hào)： | SP4439 |
| 英文描述： | Ultra-Quiet Electroluminescent Lamp Driver with Programmable Wave Shape(超靜場(chǎng)致發(fā)光燈驅(qū)動(dòng)器（可編程波形）) |
| 中文描述： | 超靜音電致發(fā)光燈帶可編程波形（超靜場(chǎng)致發(fā)光燈驅(qū)動(dòng)器（可編程波形）驅(qū)動(dòng)程序） |
| 文件頁(yè)數(shù)： | 1/13頁(yè) |
| 文件大?。?/td> | 193K |
| 代理商： | SP4439 |
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Rev. 2/15/01 SP4439 Ultra-Quiet Electroluminescent Lamp Driver With Programmable Waveshape Copyright 2000 Sipex Corporation
DESCRIPTION
The SP4439 device is a low noise, high voltage output DC-AC inverter designed to drive
electroluminescent lamps that backlight liquid crystal display and keypads used in cellular
phones, cordless phones, 2-way radios, and other wireless communication products. The output
waveform of the SP4439
device is ideal for cell phone applications requiring low acoustic noise
performance. One external resistor is used to set the internal oscillator frequency and one inductor
is required to generate the high voltage AC output to drive an EL lamp up to 6 square inches in
size. The device gives the customer flexibility to define waveform rise and fall times, to optimize
noise performance, and to optimize efficiency for customer specific applications. The SP4439
typically operates from a +3.0V battery source and has a low power standby mode that draws less
than 125nA, making it ideal for low-power cellular applications. All input pins are ESD protected
with internal diodes to V
DD
and V
SS
. The SP4439
is offered in a space-saving 10-pin MSOP package.
Ultra-Quiet Electroluminescent Lamp Driver
with Programmable Wave Shape
SP4439
V
SS
COIL
C
INT
SP4439
V
BATT
C1
0.1
μ
F
L1
820
μ
H/14
6
2
3
7
5
ELEN
1D1
INT
C
V
DD
EL2
EL1
EL Lamp
8
10
4
OSC
R
C2
1nF
R
OSC
R
D
1.1k
1
R
C
2.21k
9
R
D
R
C
I
User Programmable Waveshape Via Two External
Resistors
I
Patent Pending Low Noise Output Waveshaping
I
Waveshaped Output For Low Acoustic Noise and
Maximum Efficiency
I
Reduced Supply Current And Standby Current
I
Waveshaped Output And Low Frequency Operation
Minimizes Stress On EL Lamp To Extend Its
Lifetime
I
Uses Low Profile 820
μ
H Coils
I
Waveform With Gradual Rising And Falling Edges
Minimizes EMI
I
+2.2V To +5.0V Battery Operation
I
Space-Saving 10-pin MSOP package
APPLICATIONS
I
Cellular Radios
I
Wireless Communication
Prod
uct
V
DD
C
INT
EL1
ELEN
R
OSC
COIL
EL2
V
SS
R
C
R
D
1
2
10
9
8
7
6
3
4
5
SP4439
10 Pin MSOP
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