Opto Electronics Devices And Their Applications In Power ElectronicsAgendaWhat are Optocoupler?The Phototransistor OptocouplerCo-planar ConstructionDouble Molded ConstructionWhat are the KEY Characteristics ?Ice vs. IFCTRcb vs LED CurrentSaturated Ice vs LED CurrentIcb vs IFNon Saturated CTR vs LED CurrentSaturated CTR vs Collector CurrentNon Saturated CTR vs Collector CurrentHFE vs Base Current , IbHFE vs Collector CurrentTurn-OFF TimeWhy are they Used?KEY Characteristics of the IsolatorOptocouplers Solve the NOISE Problem“Systems” & “Approvals”Where are they used ?Insulation and Isolation in a Switch Mode Power SupplyOptical Coupled Precision Voltage ReferenceFeedback Amplifier FOD2741 CompositionFeedback Amplifier InterconnectionIndustrial ControlApplications Process Controller - InterfacesController InputProcess Control I/O: AC/DC Signal MeasurementSlide 31Applications Industrial Data CommunicationsApplication Motion ControlProcess Controller - OutputsCan I determine the Switching Characteristics of a Phototransistor ?Phototransistor SPICE ModelMOC207 Phototransistor SPICE ModelMOC207 Phototransistor SPICE ProgramMOC207 Phototransistor Interface SchematicOpto Electronics DevicesAnd Their ApplicationsIn Power ElectronicsPresented by Khoi TranApplication EngineerFairchild SemiconductorAgenda •What are Optocouplers ?•Where are they used ?•What are their Characteristics?What are Optocoupler?•An optocoupler consists of a light source and a photosensitive detector• The light source is an infrared LED that is used to convert current to light. •The photosensitive detector is a silicon photodiode which converts the light back to current.The Phototransistor Optocoupler•Elements•LED Source•Package•Phototransistor35678241Co-planar ConstructionDouble Molded ConstructionWhat are the KEY Characteristics ? •Collector Base Current Transfer ratio•CTRcb = Icb/IF•Transistor Current Gain•HFE = Ice / Icb•Current Transfer Ratio - CTRce•CTRce = Ice/IF•CTRce = CTRcb * HFEIce vs. IFCTRcb vs LED CurrentSaturated Ice vs LED CurrentIcb vs IFNon Saturated CTR vs LED CurrentSaturated CTR vs Collector CurrentNon Saturated CTR vs Collector CurrentHFE vs Base Current , IbHFE vs Collector CurrentTurn-OFF TimeWhy are they Used? •To Protects Against :–Electromagnetic Interference–High tension power lines–Noise conducted through the power lines–Electrostatic Discharge, Lightning –Digital Data Crosstalk •To Communicate Digital Data –Compatible with Logic Family or LoadKEY Characteristics of the Isolator•Electro-mechanical –Relay –Switch•Electro-Optical–Optical Fiber–Emitter to Detector–Optocoupler•Capacitive–Single ended–Differential•Electro-Magnetic–Magneto resistive–Hall Effect–Transformer Acoustic Surface wavesTransducer - ReceiverRadio FrequencyRemote controlMicrowaveOptocouplers Solve the NOISE Problem“Systems” & “Approvals”•Couplers must fulfill•Safety Standards:•Fairchild Couplers are •classified in “Systems”. •A System represents the•same Technology, Material e.t.c.•and is indicated with a Capital•The System is the Indicator•for ApprovalsApprovals forSafety Requirements:Double Protection &Reinforced InsulationWhere are they used ?•Applications•Industrial Control•Power Supply•Telecommunications•InstrumentationInsulation and Isolation in a Switch Mode Power SupplySwitchingControl CircuitOptical Coupled Precision Voltage ReferenceFeedback Amplifier FOD2741 Composition•The FOD2741/2 consists of adjustable precision zener diode and a phototransistor optocoupler. Typical•Current gain , CTR, is 60% for an IF = 1mA, and Vce = 0.5V. •The device offers a 2.5V +- 1% bandgap reference, a 60dB (OLG) 1 MHz(BWP) differential amplifierVinFOD2741CompLEDVrefCompVinVrefCompVinDC Isolation AmplifierError AmplifierFeedback Amplifier Interconnection•Values of resistors and capacitors are used in the demo board supporting the KA5M0365 FOD2741R6 680R3 470 R4,3KC2,.1uFC1 .033uFR2 3.3KR5, 1KR1,1K4 uA 0.9 mA2.5RR+–Vfb5V12V0.5VVoffset2.5VKA5M0365Industrial ControlInterfaceSensorsTemperature FlowLevelMotion SystemsPumpsMixersValvesCommunicationsLocalRemoteApplicationsProcess Controller - Interfaces•Interfaces–Data–Motion–Sensor–Valves & ActuatorsController InputI / O Interface BoardSignalConditioningMultiplexerLevel DetectorLogic InterfaceSignalConditioningIsolation Barrier1 - 4 5 - 8Level DetectorLogic InterfaceILQ620ILQ620ToµControllerSFH6700Process Control I/O: AC/DC Signal Measurement•Parallel A / DDataA / D ConverterControl 16Isolation CNY17ILQ621ILQ621BarrierSignalConditioning1DC / DC ConverterProcess Control I/O: AC/DC Signal Measurement•AC / DC Measurement CardSignal ConditioningSignal ConditioningIsolationBarrierDataOutControlDC/DCConverterµControllerSAB80C5XXSAB80C16XSerial I/OMUX A/D ConverterSFH6700SFH6700116ApplicationsIndustrial Data Communications•Isolate and • Communicate–Device Net–CAN BUS–PROFI BUS–Genius Bus–Fieldbus–Modbus–10Base-T–RS - 232–RS - 422–RS - 485ApplicationMotion ControlMotor ControlHigh Speed CouplersTRIAC DriversSensor FeedbackHigh Speed CouplersProcess Controller - OutputsBoards or Module Loads LogicSFH67XX Analog 4-20 mA High Power DCSFH6345TRIAC AC Switch—SSR IL410MOSFET BUZ XX AC / DC SwitchIL300ControllerLH1485IGBT—BUP XXMotors, relays, solenoidsLarge motorsDigital interfacesSensor feedbackMotors, relays,solenoids, lamps, heatersCan I determine the Switching Characteristics of a Phototransistor ? •YES…–By using a SPICE Simulation–By Modeling the LED to Phototransistor•GAIN & Timing performance–By Modeling the Transistor Gain •and Its Charge Storage CharacteristicsPhototransistor SPICE ModelD1 LEDVMCurrent to Voltage Converter62CollectorVoltage to Current Converter5Base14EmitterC1,200pFR1, 250žH1G1MOC207 PhototransistorSPICE Model •.SUBCKT OPMOC207 1 2 5 67•*ANODE INPUT=1, CATHODE = 2;EMITTER OUTPUT=5•+;COLLECTOR OUTPUT=6; base input=6•VM 1 12 DC 0•D1 12 2 LED•R1 10 11 250•C1 11 0 200PF•H1 10 0 VM 2.7E-3•G1 5 7 11 0 1.0•Q1 6 7 5 QNPN•.MODEL LED D(IS=25E-13 RS=.55 CJO=35PN=2.0)•.MODEL QNPN NPN(IS=3.33E-11 NF=1.35 CJC=12P CJE=35P TF=1.0N •+ TR=500N BF=778 BR=10 IKF=.1 VAF=100)•.ENDS OPMOC207MOC207 PhototransistorSPICE Program•X1 1 0 0 3 9 OPMOC207•IIN 0 1 DC .001 AC .1 PULSE 0•+10E-3 100NS 100NS 100NS 10US 40US•RL 7 3 1000•VCC 7 0 5•RB 9 0