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FOD2712 데이터시트 PDF




Fairchild Semiconductor에서 제조한 전자 부품 FOD2712은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 FOD2712 기능
기능 Power Conversion for the Data Communications Market
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FOD2712 데이터시트, 핀배열, 회로
OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2712
DESCRIPTION
The FOD2712 Optically Isolated Amplifier consists of the
popular RC431A precision programmable shunt
reference and an optocoupler. The optocoupler is
a gallium arsenide (GaAs) light emitting diode
optically coupled to a silicon phototransistor. The
reference voltage tolerance 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 eliminates the need for adjustments in many
applications.
The device comes in a compact 8-pin small outline package.
FEATURES
• 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
FUNCTIONAL BLOCK DIAGRAM
NC 1
C2
E3
8 LED
7 FB
6 COMP
APPLICATIONS
NC 4
5 GND
• Power system for workstations
• Telecom central office supply
• Telecom bricks
PACKAGE DIMENSIONS
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
NOTE
All dimensions are in inches (millimeters)
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.
* The compensation network must be attached between pins 6 and 7.
© 2003 Fairchild Semiconductor Corporation
Page 1 of 13
4/10/03




FOD2712 pdf, 반도체, 판매, 대치품
OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2712
OUTPUT CHARACTERISTICS (TA = 25°C Unless otherwise specified.)
Parameter
Test Conditions Symbol
Min
Typ
Max Unit
Collector dark current
Collector-emitter voltage breakdown
Emitter-collector voltage breakdown
(VCE = 10 V) (Fig. 5)
(IC = 1.0mA)
(IE = 100 µA)
ICEO
BVCEO
BVECO
70
7
50 nA
V
V
TRANSFER CHARACTERISTICS (TA = 25°C Unless otherwise specified.)
Parameter
Test Conditions Symbol Min Typ Max Unit
Current transfer ratio
Collector-emitter
saturation voltage
(ILED = 10 mA, VCOMP = VFB,
VCE = 5 V) (Fig. 6)
CTR
(ILED = 10 mA, VCOMP = VFB,
IC = 2.5 mA) (Fig. 6)
VCE (SAT)
100
200 %
0.4 V
ISOLATION CHARACTERISTICS (TA = 25°C Unless otherwise specified.)
Parameter
Test Conditions Symbol Min
Input-output insulation
leakage current
Withstand insulation
voltage
Resistance (input to output)
(RH = 45%, TA = 25°C, t = 5s,
VI-O = 3000 VDC) (note. 1)
(RH <= 50%, TA = 25°C, t = 1 min)
(notes. 1)
VI-O = 500 VDC (note. 1)
II-O
VISO
RI-O
2500
Typ
1012
Max Unit
1.0 µA
Vrms
Ohm
SWITCHING CHARACTERISTICS (TA = 25°C Unless otherwise specified.)
Parameter
Test Conditions Symbol Min
Bandwidth
Common mode transient
immunity at output high
Common mode transient
immunity at output low
(Fig. 7)
(ILED = 0 mA, Vcm= 10 VPP
RL = 2.2 k(Fig. 8) (note. 2)
(ILED = 10 mA, Vcm= 10 VPP
RL = 2.2 k(Fig. 8) (note. 2)
BW
CMH
CML
Typ
10
1.0
1.0
Max Unit
kHZ
kV/µs
kV/µs
Notes
1. Device is considered as a two terminal device: Pins 1, 2, 3 and 4 are shorted together and Pins 5, 6, 7 and 8 are shorted together.
2. Common mode transient immunity at output high is the maximum tolerable (positive) dVcm/dt on the leading edge of the
common mode impulse signal, 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
Page 4 of 13
4/10/03

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FOD2712 전자부품, 판매, 대치품
OPTICALLY ISOLATED
ERROR AMPLIFIER
FOD2712
TYPICAL PERFORMANCE CURVES
Fig. 9a LED Current vs Cathode Voltage
15
TA = 25°C
10 VCOMP = VFB
5
0
-5
-10
-15
-1.0
-0.5 0.0 0.5 1.0
VCOMP - CATHODE VOLTAGE (V)
1.5
Fig. 9b LED Current vs Cathode Voltage
150
120 TA = 25°C
VCOMP = VFB
90
60
30
0
-30
-60
-90
-120
-150
-1.0
-0.5 0.0 0.5 1.0
VCOMP - CATHODE VOLTAGE (V)
1.5
Fig. 10 Reference Voltage vs Ambient Temperature
Fig. 11 Reference Current vs Ambient Temperature
1.254
ILED = 10 mA
1.248
350
ILED = 10 mA
R1 = 10 k
300
250
1.242
200
1.236
150
100
1.230
-40
-20 0
20 40 60
TA - AMBIENT TEMPERATURE (°C)
80
50
-40
-20 0
20 40 60 80
TA - AMBIENT TEMPERATURE (°C)
Fig. 12 Off Current vs Ambient Temperature
100
100 VLED = 13.2 V
VFB = 0
10
1
0.1
-40
-20 0
20 40 60 80
TA - AMBIENT TEMPERATURE (°C)
100
© 2003 Fairchild Semiconductor Corporation
Page 7 of 13
4/10/03

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