OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2741A
DESCRIPTION
The FOD2741 Optically Isolated Ampli鏗乪r 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 coef鏗乧ient of 50 ppm/擄C. It is primarily intended for use as the error ampli鏗乪r/
reference voltage/optocoupler function in isolated ac to dc power supplies and dc/dc con-
verters.
When using the FOD2741, 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 dip white package.
8
1
8
1
8
1
FOD2741B
FOD2741C
FEATURES
Optocoupler, precision reference and error ampli鏗乪r in single package
2.5V reference
CTR 100% to 200%
5,000V RMS isolation
UL approved E90700, Volume 2
CSA approval 1296837
VDE approval 40002463
BSI approval 8702, 8703
鈥?Low temperature coef鏗乧ient 50 ppm/擄C max
鈥?FOD2741A: tolerance 0.5%
FOD2741B: tolerance 1%
FOD2741C: tolerance 2%
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
FUNCTIONAL BLOCK DIAGRAM
NC
1
8 LED
C
2
7 FB
E
3
6 COMP
NC
4
5 GND
APPLICATIONS
鈥?Power supplies regulation
鈥?DC to DC converters
PIN DEFINITIONS
Pin Number
1
2
3
4
5
6
7
8
Pin Name
NC
C
E
NC
GND
COMP
FB
LED
Pin function description
Not connected
Phototransistor Collector
Phototransistor Emitter
Not connected
Ground
Error Ampli鏗乪r Compensation. This pin is the output of the error ampli鏗乪r. *
Voltage Feedback. This pin is the inverting input to the error ampli鏗乪r
Anode LED. This pin is the input to the light emitting diode.
* The compensation network must be attached between pins 6 and 7.
漏 2003 Fairchild Semiconductor Corporation
Page 1 of 15
12/9/04
next
FOD2741CTV相關型號PDF文件下載
-
型號
版本
描述
廠商
下載
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD ...
-
英文版
HIGH SPEED TRANSISTOR OPTOCOUPLERS
FAIRCHILD
-
英文版
HIGH SPEED TRANSISTOR OPTOCOUPLERS
FAIRCHILD ...
-
英文版
LVTTL/LVCMOS 3.3V High Speed-10 MBit/s Logic Gate Optocouple...
FAIRCHILD
-
英文版
Logic Output Optoisolator 10Mbps Open Collector, Schottky Cl...
-
英文版
LVTTL/LVCMOS 3.3V High Speed-10 MBit/s Logic Gate Optocouple...
FAIRCHILD ...
-
英文版
LVTTL/LVCMOS COMPATIBLE LOW INPUT CURRENT HIGH GAIN SPLIT DA...
FAIRCHILD
-
英文版
LVTTL/LVCMOS COMPATIBLE LOW INPUT CURRENT HIGH GAIN SPLIT DA...
FAIRCHILD ...
-
英文版
optically isolated error amplifier
FAIRCHILD
-
英文版
optically isolated error amplifier
FAIRCHILD ...
-
英文版
OPTICALLY ISOLATED ERROR AMPLIFIER
FAIRCHILD
-
英文版
OPTICALLY ISOLATED ERROR AMPLIFIER
FAIRCHILD ...
-
英文版
Power Conversion for the Data Communications Market
FAIRCHILD ...
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD ...
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD ...
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD
-
英文版
LOW INPUT CURRENT LOGIC GATE OPTOCOUPLERS
FAIRCHILD ...