FOD2712 Fairchild Optoelectronics Group, FOD2712 Datasheet

OPTOISOLATOR ERROR AMP 8SOIC

FOD2712

Manufacturer Part Number
FOD2712
Description
OPTOISOLATOR ERROR AMP 8SOIC
Manufacturer
Fairchild Optoelectronics Group
Datasheet

Specifications of FOD2712

Number Of Channels
1
Input Type
DC
Voltage - Isolation
2500Vrms
Current Transfer Ratio (min)
100% @ 10mA
Current Transfer Ratio (max)
200% @ 10mA
Voltage - Output
30V
Current - Output / Channel
50mA
Vce Saturation (max)
400mV
Output Type
Transistor
Mounting Type
Surface Mount
Package / Case
8-SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Dc Forward (if)
-
Other names
FOD2712FS
FOD2712FS
FOD2712_NL
FOD2712_NL

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
FOD2712
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FOD2712A
Manufacturer:
ON
Quantity:
15 698
Company:
Part Number:
FOD2712A
Quantity:
22 378
Company:
Part Number:
FOD2712A
Quantity:
112
Part Number:
FOD2712AR
Manufacturer:
FAIRCHILD
Quantity:
16 630
Part Number:
FOD2712AR2
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
Part Number:
FOD2712AR2
Manufacturer:
FAIRCHILD
Quantity:
17 504
Company:
Part Number:
FOD2712AR2
Quantity:
5 000
Part Number:
FOD2712R2
Manufacturer:
FSC
Quantity:
5 000
Part Number:
FOD2712R2
Manufacturer:
JPC
Quantity:
5 000
Part Number:
FOD2712R2
Manufacturer:
FAIRCHILD
Quantity:
8 000
Part Number:
FOD2712R2
Manufacturer:
FAIRCHILD/仙童
Quantity:
20 000
©2003 Fairchild Semiconductor Corporation
FOD2712 Rev. 1.0.0
FOD2712
Optically Isolated Error Amplifier
Features
Applications
Schematic
Optocoupler, precision reference and error amplifier in
single package
1.240V ± 1% reference
CTR 100% to 200%
2,500V RMS isolation
VDE approval 136616
BSI approval 8661 and 8662
UL approval E90700
CSA approval 1113643
Power system for workstations
Telecom central office supply
Telecom bricks
NC
NC
C
E
4
1
2
3
8 LED
7
6
5
FB
COMP
GND
Description
The FOD2712 Optically Isolated Amplifier consists of the
popular RC431A precision programmable shunt refer-
ence and an optocoupler. The optocoupler is a gallium
arsenide (GaAs) light emitting diode optically coupled to
a silicon phototransistor. The reference voltage toler-
ance is 1%. The current transfer ratio (CTR) ranges from
100% to 200%.
It is primarily intended for use as the error amplifier/
reference voltage/optocoupler function in isolated AC to
DC power supplies and dc/dc converters.
When using the FOD2712, power supply designers can
reduce the component count and save space in tightly
packaged designs. The tight tolerance reference elimi-
nates the need for adjustments in many applications.
The device comes in a compact 8-pin small outline
package.
Package Outline
December 2008
www.fairchildsemi.com

Related parts for FOD2712

FOD2712 Summary of contents

Page 1

... It is primarily intended for use as the error amplifier/ reference voltage/optocoupler function in isolated power supplies and dc/dc converters. When using the FOD2712, power supply designers can reduce the component count and save space in tightly packaged designs. The tight tolerance reference elimi- nates the need for adjustments in many applications. ...

Page 2

... Typical Application FAN4803 PWM V 1 Control ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 Functional 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 amplifi ...

Page 3

... PD3 Total Power Dissipation Notes: 1. Derate linearly from 25° rate of 2.42mW/°C 2. Derate linearly from 25° rate of 1.42mW/°C. 3. Derate linearly from 25° rate of 2.42mW/°C. ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0 25°C unless otherwise specified) A Parameter -55 to +125 (1) ...

Page 4

... A 2. The dynamic impedance is defined as |Z resistors (see Figure 2), the total dynamic impedance of the circuit is given by ------- - Z 1 OUT, TOT OUT I ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0 12V 25°C unless otherwise specified Test Conditions I = 10mA, V LED (Fig. COMP FB (Fig ...

Page 5

... Vcm, to assure that the output will remain high. Common mode transient immunity at output low is the maximum tolerable (negative) dVcm/dt on the trailing edge of the common pulse signal,Vcm, to assure that the output will remain low. ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0 12V 25°C unless otherwise specified) (Continued) ...

Page 6

... Test Circuits I (LED REF 5 Figure (min) Test Circuit REF F, LED I (LED REF Figure 3. I Test Circuit REF Figure 5. I Test Circuit CEO ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0 Figure CEO (LED COMP R2 V REF Test Circuit REF/ COMP I (OFF (LED Figure 4 ...

Page 7

... Test Circuits (Continued + OUT 2.2k V OUT ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0 0 Figure 7. Frequency Response Test Circuit VCM _ + 10V P-P Figure 8. CMH and CML Test Circuit 0.47V = www.fairchildsemi.com ...

Page 8

... CATHODE VOLTAGE (V) COMP Fig. 10 Reference Voltage vs. Ambient Temperature 1.254 I = 10mA LED 1.248 1.242 1.236 1.230 -40 - – AMBIENT TEMPERATURE ( C) A ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 Fig. 9b LED Current vs. Cathode Voltage 150 T 120 A V COMP -30 -60 -90 -120 -150 -1.0 0.5 1 ...

Page 9

... V – FORWARD VOLTAGE (V) F Fig. 15 Collector Current vs. Ambient Temperature -40 - – AMBIENT TEMPERATURE ( C) A ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 (Continued) 1000 V CE 100 0.1 1.20 1.25 1.30 1.35 -40 Fig. 16 Current Transfer Ratio vs. LED Current 160 140 I = 20mA LED ...

Page 10

... Typical Performance Curves Fig. 18 Collector Current vs. Collector Voltage – COLLECTOR-EMITTER VOLTAGE (V) CE -10 -15 ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 (Continued) Fig. 19 Delta LED LED - LED LED - -40 Fig. 20 Voltage Gain vs. Frequency 0 500 - 100 FREQUENCY kHz 10 /Delta V vs. Ambient Temperature REF ...

Page 11

... Feedback Output voltage of a converter is determined by selecting a resistor divider from the regulated output to the FB pin. The FOD2712 attempts to regulate its FB pin to the ref- erence voltage, 1.24V. The ratio of the two resistors should thus be ...

Page 12

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 8 0.164 (4.16) 0.144 (3.66) 1 ...

Page 13

... R2V Marking Information Definitions ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 V VDE 0884 R1 Tape and reel (500 units per reel) R1V VDE 0884, Tape and reel (500 units per reel) R2 Tape and reel (2500 units per reel) R2V VDE 0884, Tape and reel (2500 units per reel) ...

Page 14

... C 140 120 100 ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 8.0 0.10 2.0 0.05 4.0 0.10 6.40 0.20 260 C Time above 183 Sec 1.822 C/Sec Ramp up rate 33 Sec 60 120 180 Time (s) 14 Ø1.5 MIN 1 ...

Page 15

... Product Status Advance Information Formative / In Design Preliminary First Production No Identification Needed Full Production Obsolete Not In Production ©2003 Fairchild Semiconductor Corporation FOD2712 Rev. 1.0.0 ® Programmable Active Droop™ SM ® QFET QS™ Quiet Series™ RapidConfigure™ ™ Saving our world, 1mW/W/ time™ ...

Related keywords