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參數(shù)資料
| 型號： | SP4490UEB |
| 英文描述： | 320 x 240 pixel format, 5.7in. Display |
| 中文描述： | 兩個(gè)小組Electroluminscent燈驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 163K |
| 代理商： | SP4490UEB |
Rev. 9/12/00
SP4490 Two Panel Electroluminescent Lamp Driver
7
Copyright 2000 Sipex Corporation
higher C
values can increase lamp brightness.
This is best determined by experimentation. A
rule of thumb is larger coils (1mH) are paired
with a smaller C
(680pF) and smaller coils
(470
μ
H) are paired with a larger C
INT
(1800pF).
Changing the EL lamp Output Voltage
Waveform
Designers can alter the sawtooth output voltage
waveform to the EL lamp. Increasing the capaci-
tance of the integration capacitor, C
will inte-
grate the sawtooth waveform making it appear
more like a square wave.
Printed Circuit Board Layout Sugges-
tions
The EL driver's high-frequency operation makes
PCB layout important for minimizing electrical
noise. Keep the IC's GND pin and the ground
leads of C1 and C
less than 0.2in (5mm) apart.
Also keep the connections to the COIL pin as
short as possible. To maximize output power
and efficiency and minimize output ripple volt-
age, use a ground plane and solder the IC's VSS
pin directly to the ground plane.
EL Lamp Driver Design Challenges
There are many
variables which can be opti-
mized for specific applications. The amount of
light emitted is a function of the voltage applied
to the lamp, the frequency at which is applied, the
lamp material, the lamp size, and the inductor
used. Sipex supplies characterization charts to
aid the designer in selecting the optimum circuit
configuration.
Sipex will perform customer application evalu-
ations, using the customer's actual EL lamp to
determine the optimum operating conditions for
specific applications. For customers consider-
ing an EL backlighting solution for the first time,
Sipex is able to provide retrofits to non-backlit
products for a thorough electrical and cosmetic
evaluation. Please contact your local Sipex sales
Representative or the Sipex factory directly to
initiate this valuable service.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP4490 | Two Panel Electroluminscent Lamp Driver |
| SP4490EU | Two Panel Electroluminscent Lamp Driver |
| SP4491 | Two Panel Electroluminscent Lamp Driver |
| SP4491EU | Two Panel Electroluminscent Lamp Driver |
| SP4491UEB | Two Panel Electroluminscent Lamp Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP4491 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Two Panel Electroluminscent Lamp Driver |
| SP4491EU | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Two Panel Electroluminscent Lamp Driver |
| 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 |
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