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FOD2743B

hot FOD2743B

FOD2743B

For Reference Only

Part Number FOD2743B
Manufacturer Fairchild/ON Semiconductor
Description OPTOISOLATOR 5KV TRANSISTOR 8DIP
Datasheet FOD2743B Datasheet
Package 8-DIP (0.300", 7.62mm)
In Stock 298 piece(s)
Unit Price $ 1.98 *
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FOD2743B

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FOD2743B Specifications

ManufacturerFairchild/ON Semiconductor
CategoryIsolators - Optoisolators - Transistor, Photovoltaic Output
Datasheet FOD2743B Datasheet
Package8-DIP (0.300", 7.62mm)
Series-
Number of Channels1
Voltage - Isolation5000Vrms
Current Transfer Ratio (Min)50% @ 1mA
Current Transfer Ratio (Max)100% @ 1mA
Input TypeDC
Output TypeTransistor
Voltage - Output (Max)70V
Current - Output / Channel50mA
Voltage - Forward (Vf) (Typ)1.07V
Vce Saturation (Max)400mV
Operating Temperature-40°C ~ 85°C
Mounting TypeThrough Hole
Package / Case8-DIP (0.300", 7.62mm)
Supplier Device Package8-MDIP

FOD2743B Datasheet

Page 1

Page 2

F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r ©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 August 2008 FOD2743A, FOD2743B, FOD2743C Optically Isolated Error Amplifier Features ■ Optocoupler, precision reference and error amplifier in 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 Description The FOD2743 Optically Isolated Amplifier consists of the popular KA431 precision programmable shunt reference and an optocoupler. The optocoupler is a gallium ars- enide (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 iso- lated 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 elimi- nates the need for adjustments in many applications. The device comes in an 8-pin dip white package. Functional Bock Diagram Package Outlines 8 8 1 8 1 1 1 2 3 4 5 6 7 8 NC C E NC LED COMP GND FB

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©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 2 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Pin Definitions *The compensation network must be attached between pins 2 and 4. Typical Application Pin Number Pin Name Pin Description 1 LED Anode LED. This pin is the input to the light emitting diode. 2 COMP Error Amplifier Compensation. This pin is the output of the error amplifier. * 3 GND Ground 4 FB Voltage Feedback. This pin is the inverting input to the error amplifier 5 NC Not connected 6 E Phototransistor Emitter 7 C Phototransistor Collector 8 NC Not connected VOV1 R1 R2 7 6 1 2 4 3 PWM Control FAN4803 FOD2743

Page 4

©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 3 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Absolute Maximum Ratings (T A = 25°C 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. Note: 1. See derating graph, Figure 21. Symbol Parameter Value Units T STG Storage Temperature -40 to +125 °C T OPR Operating Temperature -40 to +85 °C T SOL Lead Solder Temperature 260 for 10 sec. °C V LED Input Voltage 37 V I LED Input DC Current 20 mA V CEO Collector-Emitter Voltage 70 V V ECO Emitter-Collector Voltage 7 V I C Collector Current 50 mA PD1 Input Power Dissipation 145 mW PD2 Transistor Power Dissipation 85 mW PD3 Total Power Dissipation (1) 145 mW

Page 5

©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 4 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Electrical Characteristics (T A = 25°C unless otherwise specified) Input Characteristics Output Characteristics Transfer Characteristics Notes: 2. The deviation parameters V REF(DEV) and I REF(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, ∆ V REF , is defined as: where ∆ T A is the rated operating free-air temperature range of the device. 3. The dynamic impedance is defined as |Z OUT | = ∆ V COMP / ∆ I LED . When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by: Symbol Parameter Test Conditions Device Min. Typ. Max. Unit V F LED Forward Voltage I LED = 1mA, V COMP = V FB (Fig.1) All 1.07 1.2 V V REF Reference Voltage I LED = 1mA, V COMP = V FB FOD2743A 2.482 2.495 2.508 V FOD2743B 2.470 2.495 2.520 V FOD2743C 2.450 2.500 2.550 V V REF (DEV) (2) Deviation of V REF Over Temperature (2) T A = -25°C to +85°C All 4.5 17 mV ∆ V REF / ∆ V COMP Ratio of V REF Variation to the Output of the Error Amplifier I LED = 1mA ∆ V COMP = 10V to V REF All -0.4 -2.7 mV/V ∆ V COMP = 36V to 10V -0.3 -2.0 I REF Feedback Input Current I LED = 1mA, R 1 = 10k Ω (Fig. 3) All 2 4 µA I REF (DEV) (2) Deviation of I REF Over Temperature T A = -25°C to +85°C All 1 1.2 µA I LED (MIN) Minimum Drive Current V COMP = V FB (Fig.1) All 0.45 1.0 mA I (OFF) Off-State Error Amplifier Current V LED = 37V, V FB = 0 (Fig. 4) All 0.001 1.0 µA |Z OUT | Error Amplifier Output Impedance (3) V COMP = V REF , I LED = 1mA to 20mA, f ≥ 1.0 kHz All 0.15 0.5 Ω Symbol Parameter Test Conditions Min. Typ. Max. Unit I CEO Collector Dark Current V CE = 10V (Fig. 5) 1 50 nA BV ECO Emitter-Collector Voltage Breakdown I E = 100µA 7 10 V BV CEO Collector-Emitter Voltage Breakdown I C = 1.0mA 70 100 V Symbol Parameter Test Conditions Min. Typ. Max. Unit CTR Current Transfer Ratio I LED = 1mA, V COMP = V FB , V CE = 5V (Fig. 6) 50 100 % V CE (SAT) Collector-Emitter Saturation Voltage I LED = 1mA, V COMP = V FB, I C = 0.1mA (Fig. 6) 0.4 V ∆VREF ppm/°C( ) VREF DEV( )/VREF TA 25°C=( ){ } 10 6× ∆TA ----------------------------------------------------------------------------------------------------= ZOUT, TOT = ∆V ∆I ------- ZOUT 1 R1 R2 -------+×≈

Page 6

©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 5 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Electrical Characteristics (Continued) (T A = 25°C unless otherwise specified) Isolation Characteristics Switching Characteristics 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. Symbol Parameter Test Conditions Min. Typ. Max. Unit I I-O Input-Output Insulation Leakage Current RH = 45%, T A = 25°C, t = 5s, V I-O = 3000 VDC(4) 1.0 µA VISO Withstand Insulation Voltage RH ≤ 50%, TA = 25°C, t = 1 min.(4) 5000 Vrms RI-O Resistance (Input to Output) VI-O = 500 VDC (4) 1012 Ω Symbol Parameter Test Conditions Min. Typ. Max. Unit BW Bandwidth (Fig. 7) 50 kHZ CMH Common Mode Transient Immunity at Output HIGH ILED = 0mA, Vcm = 10 VPP, RL = 2.2kΩ(5) (Fig. 8) 1.0 kV/µs CML Common Mode Transient Immunity at Output LOW (ILED = 1 mA, Vcm = 10 VPP, RL = 2.2 kΩ(5) (Fig. 8) 1.0 kV/µs

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©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 6 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Test Circuits I(LED) V(LED) VCOMP VCOMP ICEO VCE VREF VCE I(LED) VF VREF VREF 1 7 6 7 6 V V V 2 4 3 I(LED) I(LED) IC I(OFF) IREF 1 2 7 6 7 6 7 6 V V 4 3 1 2 4 3 1 2 4 3 1 2 7 6 4 3 R1 1 2R1 R2 4 3 Figure 1. VREF, VF, ILED (min.) Test Circuit Figure 3. IREF Test Circuit Figure 5. ICEO Test Circuit Figure 6. CTR, VCE(sat) Test Circuit Figure 4. I(OFF) Test Circuit Figure 2. ∆VREF / ∆VCOMP Test Circuit

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©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 7 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Test Circuits (Continued) 6 7 8 5 1 4 2 A B 3 6 5 7 8 2 3 4 1 VCC = +5V DC VCC = +5V DC IF = 1mA IF = 0mA (A) IF = 1mA (B) VIN 0.47V 0.1 VPP 47Ω VOUT VOUT VCM 10VP-P R1 2.2kΩ RL 1µF +_ Figure 7. Frequency Response Test Circuit. Figure 8. CMH and CML Test Circuit

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©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 8 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Typical Performance Curves Fig. 10 – Reference Voltage Variation vs. Ambient Temperature ∆V R E F – R E F E R E N C E V O L T A G E V A R IA T IO N ( % ) TA = 25°C VCOMP = VFB TA – AMBIENT TEMPERATURE (°C) TA – AMBIENT TEMPERATURE (°C) Fig. 9a – LED Current vs. Cathode Voltage I L E D – S U P P L Y C U R R E N T ( m A ) I L E D – S U P P L Y C U R R E N T ( m A ) I R E F – R E F E R E N C E C U R R E N T ( µA ) -15 -10 -5 0 5 10 15 -1 0 1 2 VCOMP – CATHODE VOLTAGE (V) 3 Fig. 9b – LED Current vs. Cathode Voltage Fig. 11 – Reference Current vs Ambient Temperature -1.0 -0.5 0.0 0.5 1.0 –1 0 1 2 VCOMP – CATHODE VOLTAGE (V) 3 TA = 25°C VCOMP = VFB TA – AMBIENT TEMPERATURE (°C) -40 -20 0 20 40 60 80 100 I O F F – O F F – S T A T E C U R R E N T ( n A ) 1 10 100 Fig. 12 – Off–State Current vs. Ambient Temperature VCC = 37V VF – FORWARD VOLTAGE (V) I F – F O R W A R D C U R R E N T ( m A ) 5 0.9 1.0 1.1 1.2 70°C 25°C 0°C 1.3 1.4 10 15 20 Fig. 13 – Forward Current vs. Forward Voltage -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 1.0 1.5 2.0 2.5 3.0 3.5 4.0 ILED = 1mA, 10mA R1 = 10kΩ -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 ILED = 1mA, 10mA Normalized to TA = 25°C

Page 10

©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FOD2743A, FOD2743B, FOD2743C Rev. 1.0.1 9 F O D 2 7 4 3 A , F O D 2 7 4 3 B , F O D 2 7 4 3 C — O p tic a lly Is o la te d E rro r A m p lifi e r Typical Performance Curves (Continued) TA – AMBIENT TEMPERATURE (°C)TA – AMBIENT TEMPERATURE (°C) VCE – COLLECTOR-EMITTER VOLTAGE (V) ILED – FORWARD CURRENT (mA) 0.1 1 10 (I C /I F ) – C U R R E N T T R A N S F E R R A T IO ( % ) 20 0 40 60 80 100 120 140 160 I C – C O L L E C T O R C U R R E N T ( m A ) I L E D = 5 , 1 0 , 2 0 m A -40 -20 0 20 40 60 80 100 I C E O – D A R K C U R R E N T ( n A ) 0.1 1 10 100 1000 10000 0 1 2 3 4 5 6 7 8 9 10 I C – C O L L E C T O R C U R R E N T ( m A ) 0 5 10 15 20 25 30 35 Fig. 15 – Collector Current vs. Ambient TemperatureFig. 14 – Dark Current vs. Ambient Temperature Fig. 18 – Collector Current vs. Collector Voltage Fig. 16 – Current Transfer Ratio vs. LED Current VCE = 10V TA = 25°C ILED = 20mA ILED = 10mA ILED = 5mA ILED = 1mA Fig. 17 – Saturation Voltage vs. Ambient Temperature V C E (s a t) – S A T U R A T IO N V O L T A G E ( V ) -40 -20 0 20 40 TA – AMBIENT TEMPERATURE (°C) 60 80 100 TEMPERATURE (°C) D E L T A V re f / D E L T A V o u t ( m V /V ) -0.32 -0.34 -0.36 -0.38 -0.40 -0.42 -0.44 -0.46 -60 -40 -20 0 20 40 60 80 100 120 Fig. 19 – Rate of Change Vref to Vout vs. Temperature 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24 0.26 ILED = 10mA IC = 2.5mA ILED = 1mA IC = 0.1mA -40 -20 0 20 40 60 80 100 0 4 8 12 16 20 24 28 32 I C – C O L L E C T O R C U R R E N T ( m A ) I L E D = 1 m A 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 ILED = 5mA ILED = 10mA ILED = 1mA ILED = 20mA VCE = 5V VCE = 5V 25°C 0°C -40°C 100°C 70°C

FOD2743B Reviews

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5 / 5 (156)
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Bre***** Babu

December 29, 2020

happy with the IC and received with perfect packaging, good comunication with seller thanks.

Harle*****adhwa

December 25, 2019

Great product & fast shipping. Works as they should.

Brayl*****rshall

December 25, 2019

These are a great value at this price.

Nas*****night

November 3, 2019

Happy with purchase, would do business again

Ruby*****lton

September 28, 2019

Item came in time and looks as described.

Myla*****pinosa

August 24, 2019

Great communication with sales. A pleasure to do business with you.

Luk*****aul

July 10, 2019

Awesome components selection and availability. Ordering process is easy. They don't spam me after the purchase.

Adle*****evedo

June 18, 2019

I tested some and all look good.

Jare*****engar

April 7, 2019

FOD2743B arrived in great condition, very happy, Would buy again. A++ . thank you!!

Coral*****heppard

February 5, 2019

I bought this for myself, and liked it so much. I also bought one for a friend.

FOD2743B Guarantees

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