TI-电容隔离技术详解演示幻灯片.ppt

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Capacitive Isolation,A Technical Overview,Temperature,The Real,World,Pressure,Position,Speed,Flow,Humidity,Sound,Light,ISOLATION,PLC,m,C,DSP,DIGITAL INTELLIGENCE,ADC,TRANSCEIVERS,RS-485/CAN,Signal Isolation,What is Isolation?,Galvanic isolation:,Although Circuit 1 and Circuit 2 exchange signals,no current(electrons)pass from Circuit 1 to Circuit 2.,Why is isolation required in electrical systems:,Break ground loops,Reduce common mode noise,Safety from high voltages,Circuit 1,Circuit 2,Signals,Voltage supply 1,Voltage supply 2,Ground 1,Ground 2,Why Isolation?Ground Loops,More than one conductive path between two circuits creates a ground-loop,Multiple ground paths may lead to unintended equalization currents,Ground loop can be broken by,Disconnecting the grounds,Common-mode chokes,Frequency selective grounding,Differential amplifiers,Galvanic isolators,Only galvanic isolation provides protection for very large potential differences,Why Isolation?Common Mode Noise,Signals referencedto GND,1,Signals referencedto GND,2,Basic/Functional Isolationvs.Reinforced Isolation,“An improved basic insulation with such mechanical and electrical properties that,in itself,the insulation provides the same degree of protection against electrical shock as double insulation.It may consist of one or more layers of insulation material.”UL-60950-1,Basic/Functional Isolationvs.Reinforced Isolation(contd),When is Reinforced required:,6kVpp systems(e.g.600V IGBTs/FETs),Today:all Medical applications(5kVrms!),Future:Medical applications for isolation from the patient,Note:this is not complete and subject to change.Exceptions may apply!,Applications utilizing Isolation,Primary Task:,Isolation between High-Power and Control Signals,Isolation of Bus-Nodes to prevent Corruption of the complete Bus&Common Mode Rejection,Industrial:,Robotics,PLC input/output isolation,Industrial networks,Motor control,Power supplies,Applications utilizing Isolation,Communications:,PBX(Private Branch Exchange)and central office,Telephone terminal equipment,Telephone switching equipment,Modems,ISDN,Ethernet/PoE,Medical:,Microwave therapy,Patient monitoring,Electrocardiographs,Defibrillators,Primary Task:,Medical:,Isolation between Power and Patient,Communications:,Isolation between Power and Caller,Isolation of Bus-Nodes to prevent Corruption of the complete Bus,Consumer Electronics:,Video(TV,VCR,etc.),Plasma displays,Electronic gaming,Home appliances,Applications utilizing Isolation,Computers&Office Equipment,Isolated I/O,Printers and plotters,Fax machines,Primary Task:,Isolation between High-Power and User,Nomenclatures/Definitions(1/3),Operation Voltage:,Voltage that may be applied continuously across the Isolation barrier,mostly 560Vpk or 890Vpk,Transient Voltage:,Voltage that may occur temporarily across the barrier(tested per VDE for 1 minute),mostly 4kVpk(relates to 3kVrms per UL,as tested for 10s only)or 6kVpk,Surge Voltage,Single event surge,with the assumption that all effects have been recovered from prior to another surge-event,mostly rated for a 10kV single peak.,Nomenclatures/Definitions(2/3),Basic/Functional Isolation:,Assumes a single level of isolation with a certain strength.Applicable for most applications in industrial for fieldbusses and AC-equipment up to 400Vrms,and for consumer electronics.Mostly rated at 560Vpk continuous,4kVpk transient voltage.,Reinforced/Double Isolation:,Double Isolation assumes a two-level isolation with a certain strength eachReinforced addresses a single level of isolation that,however,provides the same reliability as the two-layer.Applicable for most medical applications and AC-equipment above 400Vrms.Mostly rated at 890Vpk continuous,6kVpk transient,10kV surge voltage.Medical needs 5kVrms transient.Intrinsically safe Applications demand double isolation.,Note:the End-equipment-standard(e.g.IEC-60950 for communications or IEC-60601-1 for medical)dictates what is needed on silicon level,Nomenclatures/Definitions(3/3),Common Mode Transient Suppression:,Discusses the quick change in Reference potential primary to secondary.Its given as the dU/dt up to which no false toggeling of the output will occur(e.g.35kV/us).Usually scales linearly with Vcc.,Creepage and Clearance,Discusses the surface-distance that may conduct if wet/polluted,respectively the air-distance.For 560V/4kV mostly 4mm is sufficient,for 890V/6kV mostly 8mm is needed.Depends on pollution degree,5 Questions,to allow educated solution-proposals,Isolation strength:basic/reinforced?,Isolation voltage:4kVpeak,560Vpeak continuos/6kVpeak,890V peak continous?,Stand-alone isolation or integration(Transceiver,Gate-Driver,Data-Converter)?,Supply Voltages?,Channel-count?,New Generation Capacitive Isolation,High voltage capacitor,Isolator construction,Top plate=Cu,Bottom Plate=Silicon Substrate(doped),Inter Level Dielectric,Mold compound,Bond wire,Min 8,m,m,High Voltage Capacitor Construction,Package/designation,Creepage mm,Clearance mm,Narrow body SOIC/D,4.8,4.3,Gull wing/DUB,6.8,6.1,Wide body SOIC/DW,8.1,8.3,Creepage distance:,Shortest distance between two conductive input to output leads measured along surface of insulation.,Clearance distance:,Shortest distance between two conductive input to output leads measured through air(line of sight).,Note:Package-changed and now allows 8.3mm min!,Actual Die-Picture,Its all capacitive,All isolated couplers can be modeled as I/O and capacitive coupled(active or parasitic),Capa-citive,ISO72X,Inductive,ADuM1xxx,GMR,IL7xx,Optical,HCPL-07xx,C,IO,1 pF,1 pF,1.1 pF,0.6 pF,e,material,SiO,2,=4.5,Polyimide=2.8,Polyimide=2.8,Mold comp.e=3.6,Capacitive,Optical,GMR,Inductive,Source:TI App note SLLA198,parameters,Med.Perf.Opto,HighPerf.Opto,Magnetic,Capacitive,Signaling Rate,Mbpss,50Mbps,150Mbps,200Mbps,Propagation Delay Time,100ns,20ns,32ns,12ns,Pulse Width Distortion,35ns,2ns,2ns,1.5ns,Ch-Ch-skew40ns,16ns,2ns,1.6ns,Part-Part-Skew,40ns,20ns,10ns,2ns,Competitive ComparisonReliability(1/2),Med.Perf.Opto,HighPerf.Opto,Magnetic,Capacitive,ESD on all Pins,No spec,No spec/2kV,No spec/2kV,4kV,CM Transient Immunity,5kV/us,20kV/us,25kV/us,25kV/us,Temperature,-40.85,o,C,-40.125,o,C,-40.125,o,C,-55.125,o,C,Competitive ComparisonReliability(2/2),60%confidence,90%confidence,Tech-nology,Ambient Temp.,MTTF years,FIT,MTTF years,FIT,Capa-citive,125oC,5639,21,2255,50,55oC,439520,0.3,175808,0.7,Magnetic,125oC,3358,34,1746,65,55oC,260825,0.44,135606,0.84,Optical,125oC,20,5727,8,14391,50oC,290,394,115,990Sample size/failures:ISO721:45447/0;ADuM1201:35411/1;HCPL-0721:160/0,Competitive ComparisonMagnetic Immunity,IEC 61000-4-8,1KHz Field Frequency,10,6,x higher Immunity than ADUM1100,Source:TI App note SLLA181A,on above link for web info),E-field immunity Test Report,E-field immunity Test Report,Magnetic,ISO7221C,1Mbps:Comparison of Radiated Noise Spectrum Antenna,Horizontal,Magnetic:1Mbps operation 5V Vcc,ISO7221:1Mbps operation 5V Vcc,EN55022 Class B Radiations Testing,25Mbps:Comparison of Radiated Noise Spectrum Antenna,Horizontal,Magnetic:25Mbps operation 5V Vcc,ISO7221:25Mbps operation 5V Vcc,EN55022 Class B Radiations Testing,Competitive Comparison High Voltage Lifetime,Source:TI App note SLLA197,expectancy:,ISO72x Competition,ISO72x,ADUM1100,Competitive Comparison High Voltage Lifetime,Using widely accepted E-Model methodology,ADUM1100,ISO72x,ISO72x:Life expectancy is 28 years at 560Vpeak or 400Vrms,Competition:Life expectancy 30kh,Icc Comparison,Figure of Merritt:Bandwidth per Supply Current,Competitive Comparison Power Up/Down,ISO721,ADUM1100,Power up behavior:,Vcc2 power supply is on,Input state is L,Ch 1 is Output:Transition from failsafe H to L,Ch2 is Vcc1 being turned on,typical turn on time is in milli sec.,Power down behavior:,Vcc2 power supply is on,Input state is L,Ch 1 is Output:Transition from L to failsafe H,Ch2 is Vcc1 being turned off,typical turn off time is in milli sec.,TI Makes Isolators Easy to Use,Started Today,Evaluation modules,Samples,Applications support,IBIS models,Data sheets,Technical documentation,Application notes on:,High-Voltage Lifetime,Magnetic Field Immunity,ISO72x Family of Digital Isolators,Complements TIs industrial product portfolio:interface,data converter,DSP,MCU,amplifier,power&logic,Isolated Products Stand-Alone,Singles,Triples,Quads,Duals,ISO7240A/C/M,ISO7241A/C/M,ISO7242A/C/M,ISO7230A/C/M,ISO7231A/C/M,ISO7220A/B/C/M,ISO7221A/B/C/M,ISO721/M,ISO722/M,Triples,Quads,Duals,ISO7440M,ISO7441M,ISO7430M,ISO7431M,ISO7420M,ISO7421M,ISO7640M,ISO7641M,ISO7630M,ISO7631M,ISO7620M,ISO7621M,560Vpk(cont),4kV pk(transient),890Vpk+(cont),6kV pk(transient),10kV(surge,tbc),Available today,Low-Power-versions,pin-compatible with ISO72xx,560Vpk(cont);4kV pk(transient),(Click on Product for more information),Isolated Products Integrated,2nd order,D,-,S,Modulator(4kV),AMC1203,10MHz,ISO1176,ISO308x,ISO1x,ISO3x,Isolated Transceivers RS-485,(Click on Product for more information),2nd order,D,-,S,Modulator(6kV),AMC1204,20MHz,Isolated RS-485Transceiver,with Integrated Transformer Driver,ISO1177,RTM:1Q10,Samples:1Q10,Isolated CAN Transceiver,ISO1050,Preview,Cross-Reference to ADI,See ESP under“product family presentations”in the isolation product-folders:,Continued(also in speaker notes),Single Channel Signal Isolators:ISO72x,4000Vpeak Isolation,560Vpeak continuous,Signaling Rate Options(ISO721B:5Mbps,ISO721:100Mbps,ISO721M:150 Mbps),UL 1577,IEC 60747-5-2(VDE 0884,Rev.2),IEC 61010-1 and CSA Approved,3.3V/5V Operation(any combination),25 kV/s Transient Immunity and High Electromagnetic Immunity,Failsafe Output and High Impedance at Input and Output with Low Vcc,Multi-Channel Stand-alone Isolators:Duals,x designates speed option:A=1Mbps;B=5Mbps;C=25Mbps;M=150Mbps,Multi-Channel Stand-alone Isolators:Triples,x,x,x designates speed option:A=1Mbps;C=25Mbps;M=150Mbps,All in DW package,x,x,Multi-Channel Stand-alone Isolators:Quad-channel,x designates speed option:A=1Mbps;C=25Mbps;M=150Mbps,All in DW package,x,x,x,Isolated 485 Transceivers,ISO308x,ISO1x,ISO3x,“Standard RS-485”,3.3V and 5V,half-duplex and full-duplex(176 and 180 configuration),1Mbpsand25Mbps,no IDODE output,ISO1176:Isolated RS/485 ProfiBus,5V,half-duplex,25Mbps,optimized for Profibus-Applications,ISODE available,Isolated CAN Transceiver,ISO1050,5V CAN transceiver,ISO11898 compliant,3.3V/5V isolated logic interface,High EM Immunity,15kV/us transient immunity,Bus fault protection of-27V to 40V,Dominant timeout function,Thermal Shutdown protection,High Input impedance with low Vcc,1Mbps,ISO 485 with Transformer Driver,Simple Complete Solution-ISO1177/ISO37/ISO3088,Features,1Mbps/20Mbps/40Mbps,1/8 Unit load 256 nodes on a bus,Glitch-Free,Failsafe,(OpenShorted,Idle),Silicon Integrated,SiO,2,Insulator,4kVpk/2500Vrms Isolation,560V working/operating,UL1577,IEC 60747-5-2(VDE 0884,rev.2),IEC 61010-1&CSA pending,EVM ISO1177EVM/ISO37EVM/ISO3088EVM,ISO1177 ProfiBus-Dec,ISO37 3V RS485 Q1,ISO3087 5V RS485 Q1,3V-5V Vcc1,DA2303/2304-AL(Coilcraft),Low-Cost Isolated Power Supply,Features,Low-Cost($5.50),High Efficiency(87%),Regulated Output(Short-Circuit Protected),For Isolation Transformers(1kV 6kV),Vin=3.3V,10%,Adjustable Vout from 3.3V to 5.0V,Iout-max=700mA 3.3V,or 200mA 5V,Power Management Products,by Texas Instruments,Power,Model,Isolation,VoltageInput Voltage,Output Voltage,Output Regulation,1W,DCP01B,1000V,5V,15V,24V,5V,5V,7V,12V,12V,15V,15V,No,1W,DCV01,1500V,5V,15V,24V,5V,5V,12V,12V,15V,15V,No,1W,DCR01,1000V,5V,15V,24V,3.3V,5V,Yes,1W,DCH01,3000V,5V,5V,5V,12V,12V,15V,15V,No,2W,DCP02,1000V,5V,12V,15V,24V,3.3V,5V,5V,7V,9V,12V,12V,15V,18V,No2W,DCR02,1000V,12V,24V,5V,Yes,Single and dual outputs,Dual-in-line,gull-wing,small-outline(SO),and SIP packaging,Up to 3000V isolation,Short-circuit protection,Thermal protection,Device-to-device synchronization,-40 to+85 C temp range,Surface-mount devices in tape and reel,AMC1203:single isolated,modulator for shunt resistors,ADS1204/5:dual/quad non-isolated,modulator for magnetic sensors,ADS1208:single non-isolated,modulator with excitation for Hall sensors,AMC1210:quad programmable digital filter for,modulators,Current Measurement Applications,AC/DC,Inverter,R,S,T,AMC1210,AMC,1203,ADS,1205,ADS,1208,L,O,A,D,