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參數(shù)資料
| 型號： | SP4422ANEB |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:55; Series:MS27508; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:16; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:16-55 RoHS Compliant: No |
| 中文描述： | 電致發(fā)光燈驅(qū)動器 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大小： | 136K |
| 代理商： | SP4422ANEB |
SP4422ADS/15
SP4422A Electroluminescent Lamp Driver
3
Copyright 2000 Sipex Corporation
THEORY OF OPERATION
The
SP4422A
is made up of three basic circuit
elements, an oscillator, coil, and switched H-bridge
network. The oscillator provides the device with
an on-chip clock source used to control the charge
and discharge phases for the coil and lamp. An
external capacitor connected between pins 7 and 8
allows the user to vary the oscillator frequency
from 32kHz to 400kHz. The graphs on page 6
show the relationship between C
and lamp
output voltage. In general, increasing the C
OSC
capacitor will increase the lamp output.
The suggested oscillator frequency is 90kHz
(C
=100pF). The oscillator output is internally
divided to create two internal control signals, f
and f
. The oscillator output is internally divided
down by 8 flip flops, a 90kHz signal will be
divided into 8 frequencies; 45kHz, 22.5kHz,
11.2kHz, 5.6kHz, 2.8kHz, 1.4kHz, 703Hz, and
352Hz. The third flip flop output (8kHz) is used to
drive the coil (see
figure 2
on
page 9)
and the
eighth flip flop output (250Hz) is used to drive the
lamp. Although the oscillator frequency can be
varied to optimize the lamp output, the ratio of
f
COIL
/f
LAMP
will always equal 32.
The on-chip oscillator of the
SP4422A
can be
overdriven with an external clock source by
removing the C
OSC
capacitor and connecting a
PIN DESCRIPTION
Pin 1 – HON- Enable for driver operation,
high = active; low = inactive.
Pin 2 – V
SS
- Power supply common, connect to
ground.
Pin 3 – Coil- Coil input, connect coil from V
DD
to pin 3.
Pin 4 – Lamp- Lamp driver output2, connect to
EL lamp.
Pin 5 – Lamp- Lamp driver output1, connect to
EL lamp.
Pin 6 – V
DD
- Power supply for driver, connect to
system V
DD
.
Pin 7 – Cap1- Capacitor input 1, connect to C
OSC
.
Pin 8 – Cap2- Capacitor input 2, connect to C
OSC
.
1
2
3
4
8
7
6
5
S
Q
Q
HON
SCR1
SCR2
OSC
FF1
FF2
EL Lamp
V
DD
Coil
4
5
EL2
EL1
7
8
Cap1
Cap2
2
V
SS
V
BATTERY
V
DD
6
3
5mH/18
1
C
O
0.1
μ
F
f
COIL
f
LAMP
f
LAMP
SP4422A Schematic
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP4422AUEB | ER 14C 12#16 2#4 SKT RECP BOX RoHS Compliant: No |
| SP4422A | High Voltage Output Electroluminescent Lamp Driver(高壓輸出，場致發(fā)光燈驅(qū)動器) |
| SP4422 | Electroluminescent Lamp Driver |
| SP4422ACN | Electroluminescent Lamp Driver |
| SP4422ACU | Electroluminescent Lamp Driver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP4422AUEB | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Electroluminescent Lamp Driver |
| SP4423 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Electroluminescent Lamp Driver Low Power Applications |
| SP4423CN | 制造商:Exar Corporation 功能描述:BALLAST/BACKLIGHT CONTROLLER/DRIVER, 8 Pin, Plastic, SOP |
| SP4423CU | 制造商:Exar Corporation 功能描述:BALLAST/BACKLIGHT CONTROLLER/DRIVER, 8 Pin, Plastic, TSSOP |
| SP4423CX | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:Electroluminescent Lamp Driver Low Power Applications |
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