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參數資料
| 型號： | FOD2742A |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 光電耦合器 |
| 英文描述： | OPTICALLY ISOLATED ERROR AMPLIFIER |
| 中文描述： | 1 CHANNEL TRANSISTOR OUTPUT OPTOCOUPLER |
| 封裝： | LEAD FREE, SOIC-8 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 567K |
| 代理商： | FOD2742A |
8/27/03
OPTICALLY ISOLATED
ERROR AMPLIFIER
Page 1 of 13
FOD2742A
FOD2742B
FOD2742C
2003 Fairchild Semiconductor Corporation
DESCRIPTION
The FOD2742 Optically Isolated Amplifier consists of the popular KA431 precision
programmable shunt reference and an optocoupler. The optocoupler is a gallium arsenide
(GaAs) light emitting diode optically coupled to a silicon phototransistor. It comes in 3
grades of reference voltage tolerance = 2%, 1%, and 0.5%.
The Current Transfer Ratio (CTR) ranges from 100% to 200%. It also has an outstanding
temperature coefficient of 50 ppm/°C. It is primarily intended for use as the error amplifier/
reference voltage/optocoupler function in isolated ac to dc power supplies and dc/dc con-
verters.
When using the FOD2742, power supply designers can reduce the component count and
save space in tightly packaged designs. The tight tolerance reference eliminates the need
for adjustments in many applications. The device comes in a 8-pin small outline package.
FEATURES
Optocoupler, precision reference and error amplifier in single package
2.5V reference
CTR 100% to 200%
2,500V RMS isolation
UL approval E90700, Volume 2
BSI approval 8661, 8662
VDE approval 136616
CSA approval 1113643
Low temperature coefficient 50 ppm/°C max
FOD2742A: tolerance 0.5%
FOD2742B: tolerance 1%
FOD2742C: tolerance 2%
APPLICATIONS
Power supplies regulation
DC to DC converters
* The compensation network must be attached between pins 6 and 7.
PIN DEFINITIONS
Pin Number
Pin Name
Pin function description
1
NC
Not connected
2
C
Phototransistor Collector
3
E
Phototransistor Emitter
4
NC
Not connected
5
GND
Ground
6
COMP
Error Amplifier Compensation. This pin is the output of the error amplifier. *
7
FB
Voltage Feedback. This pin is the inverting input to the error amplifier
8
LED
Anode LED. This pin is the input to the light emitting diode.
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
5
6
7
8 LED
FB
COMP
GND
NC
C
E
NC
相關PDF資料 |
PDF描述 |
|---|---|
| FOD2742B | OPTICALLY ISOLATED ERROR AMPLIFIER |
| FOD2742C | OPTICALLY ISOLATED ERROR AMPLIFIER |
| FOD2743A | OPTICALLY ISOLATED ERROR AMPLIFIER |
| FOD2743B | OPTICALLY ISOLATED ERROR AMPLIFIER |
| FOD2743C | OPTICALLY ISOLATED ERROR AMPLIFIER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FOD2742A_04 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:OPTICALLY ISOLATED ERROR AMPLIFIER |
| FOD2742A_08 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Optically Isolated Error Amplifier |
| FOD2742A_Q | 功能描述:光隔離放大器 Error amplifier Optocoupler RoHS:否 制造商:Avago Technologies 絕緣電壓:5000 Vrms 參考電壓: 電流傳遞比: 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| FOD2742AR1 | 功能描述:光隔離放大器 Error amplifier Optocoupler RoHS:否 制造商:Avago Technologies 絕緣電壓:5000 Vrms 參考電壓: 電流傳遞比: 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| FOD2742AR1_Q | 功能描述:光隔離放大器 Error amplifier Optocoupler RoHS:否 制造商:Avago Technologies 絕緣電壓:5000 Vrms 參考電壓: 電流傳遞比: 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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