|
|
PDF FOD2742A Data sheet ( Hoja de datos )
| Número de pieza | FOD2742A | |
| Descripción | OPTICALLY ISOLATED ERROR AMPLIFIER | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de FOD2742A (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2742A
FOD2742B
FOD2742C
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
FUNCTIONAL BLOCK DIAGRAM
NC 1
C2
E3
NC 4
8 LED
7 FB
6 COMP
5 GND
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 Amplifier Compensation. This pin is the output of the error amplifier. *
Voltage Feedback. This pin is the inverting input to the error amplifier
Anode LED. This pin is the input to the light emitting diode.
* The compensation network must be attached between pins 6 and 7.
© 2003 Fairchild Semiconductor Corporation
Page 1 of 13
8/27/03
1 page  
OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2742A
FOD2742B
FOD2742C
I(LED)
8
VF
6
V7
VREF
5
2
3
V
I(LED)
8
2
R1 6
7
R2 VREF
5
VCOMP
3
FIG. 1. VREF, VF, ILED (min) TEST CIRCUIT
FIG. 2. ∆VREF/∆VCOMP TEST CIRCUIT
I(LED)
8
IREF
6
V7
R1
5
2
3
FIG. 3. IREF TEST CIRCUIT
ICEO
82
VCE
6
3
7
5
I(OFF)
V(LED)
V
8
6
7
5
2
3
FIG. 4. I(OFF) TEST CIRCUIT
I(LED)
V
8
6
7
VREF
5
I(C)
2
VCE
3
VCOMP
FIG. 5. ICEO TEST CIRCUIT
© 2003 Fairchild Semiconductor Corporation
Page 5 of 13
FIG. 6. CTR, VCE(sat) TEST CIRCUIT
8/27/03
5 Page 
OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2742A
FOD2742B
Package Dimensions
FOD2742C
Footprint Drawing
0.164 (4.16)
0.144 (3.66)
1
0.202 (5.13)
0.182 (4.63)
0.143 (3.63)
0.123 (3.13)
0.010 (0.25)
0.006 (0.16)
0.021 (0.53)
0.011 (0.28)
0.008 (0.20)
0.003 (0.08)
0.050 (1.27)
TYP
0.244 (6.19)
0.224 (5.69)
Lead Coplanarity : 0.004 (0.10) MAX
0.024 (0.61)
0.275 (6.99)
0.155 (3.94)
0.060 (1.52)
0.050 (1.27)
ORDERING INFORMATION
Option
R1
R1V
R2
R2V
Order Entry Identifier
R1
R1V
R2
R2V
Description
Tape and reel (500 units per reel)
VDE0884, Tape and reel (500 units per reel)
Tape and reel (2,500 units per reel)
VDE0884, Tape and reel (2,500 units per reel)
MARKING INFORMATION
1 2742A 2
V X YY S 6
34
5
Definitions
1 Fairchild logo
2 Device number
3
VDE mark (Note: Only appears on parts ordered with VDE
option – See order entry table)
4 One digit year code
5 Two digit work week ranging from ‘01’ to ‘53’
6 Assembly package code
© 2003 Fairchild Semiconductor Corporation
Page 11 of 13
8/27/03
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet FOD2742A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| FOD2742A | OPTICALLY ISOLATED ERROR AMPLIFIER | Fairchild Semiconductor |
| FOD2742B | OPTICALLY ISOLATED ERROR AMPLIFIER | Fairchild Semiconductor |
| FOD2742C | OPTICALLY ISOLATED ERROR AMPLIFIER | Fairchild Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |