View FOD2743B_4343253.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
August 2008
FOD2743A, FOD2743B, FOD2743C Optically Isolated Error Amplifier
Features
Optocoupler, precision reference and error amplifier in
Description
The FOD2743 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 50% to 100%. 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 converters. When using the FOD2743, 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 an 8-pin dip white package.

a single package 2.5V reference CTR 50% to 100% at 1mA 5,000V RMS isolation UL approval E90700, Vol. 2 CSA approval 1296837 VDE approval pending BSI approval pending Low temperature coefficient 50ppm/C max FOD2743A: tolerance 0.5% FOD2743B: tolerance 1% FOD2743C: tolerance 2%
Applications
Power supplies regulation DC to DC converters
Functional Bock Diagram
Package Outlines
LED
1
8 NC
8 1
COMP
2
7C
GND
3
6E
8 8 1 1
FB
4
5 NC
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Pin Definitions
Pin Number
1 2 3 4 5 6 7 8
Pin Name
LED COMP GND FB NC E C NC
Pin Description
Anode LED. This pin is the input to the light emitting diode. Error Amplifier Compensation. This pin is the output of the error amplifier. * Ground Voltage Feedback. This pin is the inverting input to the error amplifier Not connected Phototransistor Emitter Phototransistor Collector Not connected
*The compensation network must be attached between pins 2 and 4.
Typical Application
V1
FAN4803 PWM Control
VO
FOD2743 7 1
2
R1
6
4 R2
3
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 2
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Absolute Maximum Ratings (TA = 25C unless otherwise specified)
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Symbol
TSTG TOPR TSOL VLED ILED VCEO VECO IC PD1 PD2 PD3
Storage Temperature
Parameter
Operating Temperature Lead Solder Temperature Input Voltage Input DC Current Collector-Emitter Voltage Emitter-Collector Voltage Collector Current Input Power Dissipation Transistor Power Dissipation Total Power Dissipation
(1)
Value
-40 to +125 -40 to +85 260 for 10 sec. 37 20 70 7 50 145 85 145
Units
C C C V mA V V mA mW mW mW
Note: 1. See derating graph, Figure 21.
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 3
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Electrical Characteristics (TA = 25C unless otherwise specified)
Input Characteristics Symbol
VF VREF
Parameter
LED Forward Voltage Reference Voltage
Test Conditions
ILED = 1mA, VCOMP = VFB (Fig.1) ILED = 1mA, VCOMP = VFB
Device
All
Min. Typ. Max.
1.07 1.2
Unit
V V V V mV mV/V
FOD2743A 2.482 2.495 2.508 FOD2743B 2.470 2.495 2.520 FOD2743C 2.450 2.500 2.550
VREF (DEV)(2) Deviation of VREF Over Temperature(2) VREF / VCOMP IREF IREF (DEV)(2) ILED (MIN) I(OFF) |ZOUT| Ratio of VREF Variation to the Output of the Error Amplifier Deviation of IREF Over Temperature Off-State Error Amplifier Current Error Amplifier Output Impedance(3)
TA = -25C to +85C ILED = 1mA VCOMP = 10V to VREF VCOMP = 36V to 10V
All All
4.5 -0.4 -0.3
17 -2.7 -2.0 4 1.2 1.0 1.0 0.5
Feedback Input Current ILED = 1mA, R1 = 10k (Fig. 3) TA = -25C to +85C
All All All All All
2 1 0.45 0.001 0.15
A A mA A
Minimum Drive Current VCOMP = VFB (Fig.1) VLED = 37V, VFB = 0 (Fig. 4) VCOMP = VREF, ILED = 1mA to 20mA, f 1.0 kHz
Output Characteristics Symbol
ICEO BVECO BVCEO
Parameter
Collector Dark Current Emitter-Collector Voltage Breakdown Collector-Emitter Voltage Breakdown
Test Conditions
VCE = 10V (Fig. 5) IE = 100A IC = 1.0mA
Min.
7 70
Typ.
1 10 100
Max.
50
Unit
nA V V
Transfer Characteristics Symbol Parameter
CTR Current Transfer Ratio
Test Conditions
ILED = 1mA, VCOMP = VFB, VCE = 5V (Fig. 6) ILED = 1mA, VCOMP = VFB, IC = 0.1mA (Fig. 6)
Min.
50
Typ.
Max.
100 0.4
Unit
% V
VCE (SAT) Collector-Emitter Saturation Voltage
Notes: 2. The deviation parameters VREF(DEV) and IREF(DEV) are defined as the differences between the maximum and minimum values obtained over the rated temperature range. The average full-range temperature coefficient of the reference input voltage, VREF, is defined as: V REF { V REF ( DEV ) /V REF ( T A = 25C ) } x 10 ( ppm/C ) = ---------------------------------------------------------------------------------------------------T A
6
where TA is the rated operating free-air temperature range of the device. 3. The dynamic impedance is defined as |ZOUT| = VCOMP/ILED. When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: V R1 Z OUT, TOT = ------- Z OUT x 1 + ------I R2
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 4
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Electrical Characteristics (Continued) (TA = 25C unless otherwise specified)
Isolation Characteristics Symbol
II-O VISO RI-O
Parameter
Input-Output Insulation Leakage Current Withstand Insulation Voltage Resistance (Input to Output)
Test Conditions
RH = 45%, TA = 25C, t = 5s, VI-O = 3000 VDC(4) RH 50%, TA = 25C, t = 1 min.(4) VI-O = 500 VDC(4)
Min.
Typ.
Max.
1.0
Unit
A Vrms
5000 1012
Switching Characteristics Symbol
BW CMH CML
Parameter
Bandwidth Common Mode Transient Immunity at Output HIGH Common Mode Transient Immunity at Output LOW
Test Conditions
(Fig. 7) ILED = 0mA, Vcm = 10 VPP, RL = 2.2k(5) (Fig. 8) (ILED = 1 mA, Vcm = 10 VPP, RL = 2.2 k(5) (Fig. 8)
Min.
Typ.
50 1.0 1.0
Max.
Unit
kHZ kV/s kV/s
Notes: 4. 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. 5. 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.
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 5
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Test Circuits
I(LED) I(LED) 1 VF 2 V 4 VREF 3 6 V R1 2 4 VCOMP R2 VREF 3 6 7 1 7
Figure 1. VREF, VF, ILED (min.) Test Circuit
Figure 2. VREF / VCOMP Test Circuit
I(LED) 1 7
I(OFF) 1 7
IREF 2 V R1 3 3 4 6 V 2 V(LED) 4 6
Figure 3. IREF Test Circuit
Figure 4. I(OFF) Test Circuit
1
ICEO 7 VCE
I(LED) 1 7 VCE 2 V 4 VCOMP VREF 6
IC
2 4
6
3
3
Figure 5. ICEO Test Circuit
Figure 6. CTR, VCE(sat) Test Circuit
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 6
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Test Circuits (Continued)
VCC = +5V DC IF = 1mA RL 47
8
1
1F
VOUT
7
4
0.1 VPP
VIN 0.47V
6
2
5
3
Figure 7. Frequency Response Test Circuit.
VCC = +5V DC IF = 0mA (A) IF = 1mA (B) R1 2.2k VOUT
8
1
7
4
AB
6
2
5
3
_
VCM
+
10VP-P
Figure 8. CMH and CML Test Circuit
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 7
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Typical Performance Curves
Fig. 9a - LED Current vs. Cathode Voltage
15 ILED - SUPPLY CURRENT (mA) TA = 25C VCOMP = VFB 1.0 ILED - SUPPLY CURRENT (mA)
Fig. 9b - LED Current vs. Cathode Voltage
TA = 25C VCOMP = VFB
10
0.5
5
0
0.0
-5
-0.5
-10
-15 -1 0 1 2 3 VCOMP - CATHODE VOLTAGE (V)
-1.0 -1
0
1
2
3
VCOMP - CATHODE VOLTAGE (V)
VREF - REFERENCE VOLTAGE VARIATION (%)
Fig. 10 - Reference Voltage Variation vs. Ambient Temperature
1.0 0.8 0.6 0.4 0.2 0.0 -0.2 -0.4 -0.6 -0.8 -1.0 -40 IREF - REFERENCE CURRENT (A) ILED = 1mA, 10mA Normalized to TA = 25C 4.0
Fig. 11 - Reference Current vs Ambient Temperature
ILED = 1mA, 10mA R1 = 10k 3.5
3.0
2.5
2.0
1.5
-20
0
20
40
60
80
100
1.0 -40
-20
0
20
40
60
80
100
TA - AMBIENT TEMPERATURE (C)
TA - AMBIENT TEMPERATURE (C)
Fig. 12 - Off-State Current vs. Ambient Temperature
100 VCC = 37V IOFF - OFF-STATE CURRENT (nA) IF - FORWARD CURRENT (mA) 20
Fig. 13 - Forward Current vs. Forward Voltage
15
10
10 70C
25C 0C
5
1 -40 -20 0 20 40 60 80 100 0.9 1.0 1.1 1.2 1.3 1.4
TA - AMBIENT TEMPERATURE (C)
VF - FORWARD VOLTAGE (V)
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 8
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Typical Performance Curves (Continued)
Fig. 14 - Dark Current vs. Ambient Temperature
10000 32 VCE = 10V 28 VCE = 5V
Fig. 15 - Collector Current vs. Ambient Temperature
1.6 1.4 ILED = 20mA 1.2 1.0 0.8 ILED = 10mA 12 8 4 0 -40 ILED = 5mA 0.6 0.4 0.2 0.0 100
IC - COLLECTOR CURRENT (mA) ILED = 5, 10, 20mA
1000
24 20 16
100
ILED = 1mA
10
1
0.1 -40
-20
0
20
40
60
80
100
-20
TA - AMBIENT TEMPERATURE (C)
0 20 40 60 TA - AMBIENT TEMPERATURE (C)
80
Fig. 16 - Current Transfer Ratio vs. LED Current
160 0.26 VCE = 5V 140 120 100 80 -40C 60 70C 40 20 0 0.1 100C
Fig. 17 - Saturation Voltage vs. Ambient Temperature
0.24 0.22 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 -40 -20 0 20 40 60 80 100 ILED = 1mA IC = 0.1mA ILED = 10mA IC = 2.5mA
(IC/IF) - CURRENT TRANSFER RATIO (%)
25C 0C
1 10 ILED - FORWARD CURRENT (mA)
VCE(sat) - SATURATION VOLTAGE (V)
TA - AMBIENT TEMPERATURE (C)
Fig. 18 - Collector Current vs. Collector Voltage
35 TA = 25C 30 25 20 15 10 ILED = 5mA 5 ILED = 1mA 0 0 1 2 3 4 5 6 7 8 9 10 ILED = 10mA ILED = 20mA -0.32 -0.34
Fig. 19 - Rate of Change Vref to Vout vs. Temperature
IC - COLLECTOR CURRENT (mA)
DELTA Vref / DELTA Vout ( mV/V)
-0.36 -0.38 -0.40 -0.42 -0.44 -0.46 -60
-40
-20
0
20
40
60
80
100
120
VCE - COLLECTOR-EMITTER VOLTAGE (V)
TEMPERATURE (C)
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 9
IC - COLLECTOR CURRENT (mA) ILED = 1mA
ICEO - DARK CURRENT (nA)
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Typical Performance Curves (Continued)
Fig. 20 - Voltage Gain vs. Frequency
5 VCC = 10V
VOLTAGE GAIN (dB)
0
IF = 10mA R L = 500 IF = 1mA RL = 2.4k IF = 10mA R L = 1k
-5
IF = 10mA RL = 100
-10
-15 1 10 100 FREQUENCY (kHz) 1000
Fig. 21 - Package Power Dissipation vs Ambient Temperature
200 PACKAGE POWER DISSIPATION (mW)
150
100
50
0 -40
-20
0
20
40
60
80
100
Ta - AMBIENT TEMPERATURE (C)
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 10
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
The FOD2743
The FOD2743 is an optically isolated error amplifier. It incorporates three of the most common elements necessary to make an isolated power supply, a reference voltage, an error amplifier, and an optocoupler. It is functionally equivalent to the popular KA431 shunt voltage regulator plus the CNY17F-X optocoupler.
Compensation
The compensation pin of the FOD2743 provides the opportunity for the designer to design the frequency response of the converter. A compensation network may be placed between the COMP pin and the FB pin. In typical low-bandwidth systems, a 0.1F capacitor may be used. For converters with more stringent requirements, a network should be designed based on measurements of the system's loop. An excellent reference for this process may be found in "Practical Design of Power Supplies" by Ron Lenk, IEEE Press, 1998.
Powering the Secondary Side
The LED pin in the FOD2743 powers the secondary side, and in particular provides the current to run the LED. The actual structure of the FOD2743 dictates the minimum voltage that can be applied to the LED pin: The error amplifier output has a minimum of the reference voltage, and the LED is in series with that. Minimum voltage applied to the LED pin is thus 2.5V + 1.2V = 3.7V. This voltage can be generated either directly from the output of the converter, or else from a slaved secondary winding. The secondary winding will not affect regulation, as the input to the FB pin may still be taken from the output winding. The LED pin needs to be fed through a current limiting resistor. The value of the resistor sets the amount of current through the LED, and thus must be carefully selected in conjunction with the selection of the primary side resistor.
Secondary Ground
The GND pin should be connected to the secondary ground of the converter.
No Connect Pins
The NC pins have no internal connection. They should not have any connection to the secondary side, as this may compromise the isolation structure.
Photo-Transistor
The Photo-transistor is the output of the FOD2743. In a normal configuration the collector will be attached to a pull-up resistor and the emitter grounded. There is no base connection necessary. The value of the pull-up resistor, and the current limiting resistor feeding the LED, must be carefully selected to account for voltage range accepted by the PWM IC, and for the variation in current transfer ratio (CTR) of the opto-isolator itself. Example: The voltage feeding the LED pins is +12V, the voltage feeding the collector pull-up is +10V, and the PWM IC is the Fairchild FAN4803, which has a 5V reference. If we select a 10k resistor for the LED, the maximum current the LED can see is: (12V - 4V) / 10k = 800A. The CTR of the opto-isolator is a minimum of 50%, so the minimum collector current of the photo-transistor when the diode is full on is 400A. The collector resistor must thus be such that: 10V - 5V ----------------------------------- < 400A or R COLLECTOR > 12.5k; R COLLECTOR select 20k to allow some margin.
Feedback
Output voltage of a converter is determined by selecting a resistor divider from the regulated output to the FB pin. The FOD2743 attempts to regulate its FB pin to the reference voltage, 2.5V. The ratio of the two resistors should thus be: R TOP V OUT ------------------------- = -------------- - 1 R BOTTOM V REF The absolute value of the top resistor is set by the input offset current of 5.2A. To achieve 0.5% accuracy, the resistance of RTOP should be: V OUT - 2.5 ---------------------------- > 1040A R TOP
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 11
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Package Dimensions
Through Hole
PIN 1 ID.
4 3 2 1
4 3 2 1
0.4" Lead Spacing
PIN 1 ID.
0.270 (6.86) 0.250 (6.35)
5 6 7 8
0.270 (6.86) 0.250 (6.35)
0.390 (9.91) 0.370 (9.40)
5
6
7
8
SEATING PLANE
0.070 (1.78) 0.045 (1.14) 0.200 (5.08) 0.140 (3.55) 0.020 (0.51) MIN
SEATING PLANE
0.390 (9.91) 0.370 (9.40) 0.070 (1.78) 0.045 (1.14) 0.200 (5.08) 0.140 (3.55) 0.004 (0.10) MIN
0.154 (3.90) 0.120 (3.05) 0.022 (0.56) 0.016 (0.41) 0.100 (2.54) TYP 0.016 (0.40) 0.008 (0.20) 15 MAX 0.300 (7.62) TYP
0.154 (3.90) 0.120 (3.05) 0.022 (0.56) 0.016 (0.41) 0.100 (2.54) TYP 0.016 (0.40) 0.008 (0.20) 0 to 15 0.400 (10.16) TYP
Surface Mount
0.390 (9.91) 0.370 (9.40)
4 3 2 1
8-Pin DIP - Land Pattern
0.070 (1.78)
PIN 1 ID.
0.270 (6.86) 0.250 (6.35)
0.060 (1.52)
5
6
7
8
0.100 (2.54) 0.295 (7.49) 0.415 (10.54) 0.030 (0.76)
0.070 (1.78) 0.045 (1.14) 0.020 (0.51) MIN
0.300 (7.62) TYP 0.016 (0.41) 0.008 (0.20)
0.022 (0.56) 0.016 (0.41) 0.100 (2.54) TYP Lead Coplanarity : 0.004 (0.10) MAX
0.045 (1.14) 0.315 (8.00) MIN 0.405 (10.30) MAX.
Note: All dimensions are in inches (millimeters)
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 12
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Ordering Information
Option
No Option S SD T V TV SV SDV
Example Part Number
FOD2743A FOD2743AS FOD2743ASD FOD2743AT FOD2743AV FOD2743ATV FOD2743ASV FOD2743ASDV
Description
Standard Through Hole Surface Mount Lead Bend Surface Mount; Tape and Reel 0.4" Lead Spacing VDE0884 VDE0884; 0.4" Lead Spacing VDE0884; Surface Mount VDE0884; Surface Mount; Tape and Reel
Marking Information
1
2743A V
3 4
2 6
XX YY B
5
Definitions
1 2 3 4 5 6
Fairchild logo Device number VDE mark (Note: Only appears on parts ordered with VDE option - See order entry table) Two digit year code, e.g., `03' Two digit work week ranging from `01' to `53' Assembly package code
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 13
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Carrier Tape Specifications
D0 K0
t
P0
P2
E
A0 W1 B0
F W
d
User Direction of Feed
P
D1
Symbol
W t P0 D0 E F P2 P A0 B0 K0 W1 d R Pocket Pitch Tape Width
Description
Tape Thickness Sprocket Hole Pitch Sprocket Hole Diameter Sprocket Hole Location Pocket Location
Dimension in mm
16.0 0.3 0.30 0.05 4.0 0.1 1.55 0.05 1.75 0.10 7.5 0.1 4.0 0.1 12.0 0.1 10.30 0.20 10.30 0.20 4.90 0.20
Pocket Dimensions
Cover Tape Width Cover Tape Thickness Max. Component Rotation or Tilt Min. Bending Radius
1.6 0.1 0.1 max 10 30
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 14
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
Reflow Profile
* Peak reflow temperature * Time of temperature higher than 245C * Number of reflows 260C (package surface temperature) 40 seconds or less Three
300
10 s
250 Temperature (C)
260 245
200
150 40 s 100
50
50
100
150 Time (s)
200
250
300
Figure 22. Recommended IR Reflow Profile
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 15
FOD2743A, FOD2743B, FOD2743C -- Optically Isolated Error Amplifier
TRADEMARKS The following includes registered and unregistered trademarks and service marks, owned by Fairchild Semiconductor and/or its global subsidiaries, and is not intended to be an exhaustive list of all such trademarks. Build it NowTM CorePLUSTM CorePOWERTM CROSSVOLTTM CTLTM Current Transfer LogicTM EcoSPARK(R) EfficentMaxTM EZSWITCHTM * TM
(R)
Fairchild(R) (R) Fairchild Semiconductor FACT Quiet SeriesTM FACT(R) FAST(R) FastvCoreTM FlashWriter(R) *
FPSTM F-PFSTM FRFET(R) SM Global Power Resource Green FPSTM Green FPSTMe-SeriesTM GTOTM IntelliMAXTM ISOPLANARTM MegaBuckTM MICROCOUPLERTM MicroFETTM MicroPakTM MillerDriveTM MotionMaxTM Motion-SPMTM OPTOLOGIC(R) OPTOPLANAR(R)
(R)
PDP SPMTM Power-SPMTM PowerTrench(R) Programmable Active DroopTM QFET(R) QSTM Quiet SeriesTM RapidConfigureTM Saving our world, 1mW at a timeTM SmartMaxTM SMART STARTTM SPM(R) STEALTHTM SuperFETTM SuperSOTTM -3 SuperSOTTM -6 SuperSOTTM -8 SupreMOSTM SyncFETTM
(R)
The Power Franchise
(R)
TinyBoostTM TinyBuckTM (R) TinyLogic TINYOPTOTM TinyPowerTM TinyPWMTM TinyWireTM SerDesTM UHC(R) Ultra FRFETTM UniFETTM VCXTM VisualMaxTM
* EZSWITCHTM and FlashWriter(R) are trademarks of System General Corporation, used under license by Fairchild Semiconductor. DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD'S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
ANTI-COUNTERFEITING POLICY Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support. Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed applications, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Preliminary No Identification Needed Obsolete Product Status Formative / In Design First Production Full Production Not In Production Definition Datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. Datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve the design. Datasheet contains specifications on a product that is discontinued by Fairchild Semiconductor. The datasheet is for reference information only.
Rev. I35
(c)2004 Fairchild Semiconductor Corporation FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1
www.fairchildsemi.com 16

▲Up To Search▲

Price & Availability of FOD2743B

	To Download FOD2743B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .