Ultra-Wide-Body Digital Isolators Make High-Voltage Applications More Efficient and Reliable
In recent years, the number of photovoltaic systems, chargers, new energy vehicles, energy storage facilities, and other emerging technologies is increasing, and the installed base of industrial control devices, power supply, electricity, and other conventional applications is still climbing. In this setting, high-voltage digital control applications pose growing isolation requirements, and the market sees strong demand for high-efficiency and high-reliability digital isolators accordingly.
In high-voltage systems, a reliable isolation gate must be built using isolation means, which electrically isolates sensitive electronic components from fast transient high-voltage components to ensure power safety, better system performance, and higher reliability. To this end, many factors need to be taken into account, including isolation rating, creepage distance and electric clearance, common-mode transient immunity (CMTI), and electromagnetic interference (EMI).
Wide bandgap (WBG) devices like SiC and driver products pose higher requirements for isolators while continuously improving the power density. Digital isolator now has become one of the semiconductor devices that help unlock the huge potential of high-voltage applications. It is widely used in photovoltaic systems, new energy vehicles, industrial automation systems, isolated SPI, RS232, RS485, general-purpose multi-channel isolation units, and motor control.
Challenges facing high-voltage isolation
The growing requirements for higher reliability, longer service life and higher signal integrity in industry and automotive fields present challenges for high-voltage applications.
High voltage power conversion must enhance efficiency while minimizing the system power loss. High voltage isolation design requires a robust isolation barrier to ensure system security. Under harsh operating conditions, it is necessary to address the difficulty in accurately measuring temperature, current, and voltage by high voltage sensors.
In addition, the use of WBG power devices also makes low-delay real-time control of high-voltage systems essential. As the electrification process advances and high-voltage power systems become more complex, designers need to consider how to improve product performance and service life while ensuring the right isolation level and system security.
A digital isolator is a device that enables signal transmission in electrical isolation conditions. Featuring high operating voltage, low radiation, low power consumption, and high efficiency, it is extensively used in industrial control, electric energy, communication networks, instrumentation, consumer electronics, and other electronic systems and devices.
At present, three mainstream isolation solutions are available in the market: optocouplers, capacitive isolators, and magnetic isolators.
Optocoupler came as the earliest isolation technology. It uses optical characteristics to realize one-way transmission of signals. However, due to optical attenuation over time, optocouplers may experience the aging effect.
Capacitive isolator uses the capacitance effect to eliminate cross interference between signals and features low propagation delay. It can transmit data at a rate of more than 150Mbps and consumes less bias current. However, a capacitive isolator requires separate bias supply voltages on both sides of the isolation boundary. The biggest advantage of the capacitive isolator is that it is low-cost and can adopt a multichannel design.
Magnetic isolator isolates signals by shielding the magnetic field. This makes it advantageous in applications requiring high-frequency DC-DC power conversion, but it is relatively expensive.
Ultra-wide-body package emerging at the right time
In photovoltaic applications, monocrystalline silicon and polycrystalline silicon materials are required. To improve the power density of photovoltaic modules, the bus voltage has been increased to 1500 V. This requires an isolator that provides a longer creepage distance to meet the voltage withstand and creepage distance requirements specified in China’s national standard GB4943.1-2022. As a response, some wide-body (SOP) and even ultra-wide-body (DWW) packages emerged. Different manufacturers designate different names for ultra-wide-body packages.
An ultra-wide-body digital isolator is a highly reliable isolation product that features high electromagnetic immunity, low electromagnetic radiation, and low power consumption, and can withstand higher isolation surge voltage. The creepage distance of the ultra-wide-body package is up to 15 mm, which can meet the safety requirements of customers’ high-voltage systems. In photovoltaic systems, for example, the creepage distance of the isolator under 1500V enhanced insulation condition shall be more than 14 mm, as required in IEC 62109.
NSI82xx digital isolators from NOVOSENSE are products in the ultra-wide-body packages. They provide a long creepage distance of 15mm and an outstanding EMC property. This makes this digital isolator series a perfect choice for photovoltaic facilities and other high-voltage systems having a high creepage distance requirement. Moreover, the NSI82xx series is compatible with high-precision, high-speed, and two-way digital isolators from other manufacturers, such as ISO78xx, ISO774x-Q1, ACNT-H6xL, etc.
Depending on applications, the NSI82xx series is divided into two sub-series – NSI82xx-DSWWR and NSI82xx-Q1SWWR high-reliability, multichannel Ultra-wide-body digital isolators. NSI82xx-DSWWR sub-series is designed for industrial applications, including NSI822xWx-DSWWR (2-channel), NSI823xWx-DSWWR (3-channel), and NSI824xWx-DSWWR (quad-channel). NSI82xx-Q1SWWR sub-series is suitable for automotive applications, including NSI822xWx-Q1SWWR (2-channel), NSI823xWx-Q1SWWR (3-channel), and NSI824xWx-Q1SWWR (quad-channel).
According to the available information, NSI82xx-DSWWR ultra-wide-body digital isolators started mass production in January 2022, and a total of more than one million devices have been sold currently. More specifically, customers from power supply, NEVs, electric power, industrial control, photovoltaic, energy storage, and charging piles are using ultra-wide-body digital isolators from NOVOSENSE.
Answering high efficiency, high reliability, and multi-function requirements
For example, the quad-channel NSI824x digital isolator has UL1577 safety approval and can withstand several levels of insulation voltage (3 kVrms, 3.75 kVrms, 5 kVrms, and 8 kVrms). It’s noted that the ultra-wide-body package provides insulation voltage withstand capability of up to 8 kVrms, data rate of up to 150 Mbps, and CMTI of up to 200kV/μs (min.).
Eye diagram showing high-speed performance of NSI824x
The NSI824x device provides digital channel direction configuration and the default output level configuration when the input power is lost. Thanks to a wide supply voltage range, NSI824x can be directly connected with most digital interfaces and allows easy level shift. Moreover, high system level EMC performance enhances its reliability and stability in service.
The NSI824x series adopts the capacitive isolator technology, where the digital signal is modulated by the RF carrier generated by the internal oscillator on the transmitter side, then transmitted via the capacitive isolator and demodulated on the receiver side. It’s especially noted that the proprietary Adaptive OOK® modulation technology from NOVOSENSE is used, which delivers many benefits including high noise resistance and low EMI.
Functional block diagram of the single-channel device and OOK modulation
Key features
NSI824x digital isolators have rich functional features as described below:
Insulation voltage: Up to 8kVrms (Ultra-wide-body package)
Data rate: DC to 150Mbps
Power supply voltage: 2.5V to 5.5V
High CMTI: 200kV/μs (min.)
Chip level ESD: ±8kV (human body model)
Robust electromagnetic compatibility (EMC)
System-level ESD, EFT, and surge immunity
Low electromagnetic radiation
Default output high level or low level option
Low power consumption: 1.5mA/ch (1Mbps)
Low propagation delay: <15ns
Operating temperature: -55℃-125℃
RoHS-compliant packages:
SOP16 (150mil), SSOP16, SOP16 (300mil) and SOP16 (600 mil)
Part number, package, and body size
NSI824x digital isolators have the following safety regulatory approvals:
UL1577 recognition: Insulation voltage up to 8kVrms for 1 minute
CQC certification per GB4943.1-2011
CSA component notice 5A
DIN VDE V 0884-11:2017-01 enhanced isolator certification
IPM's typical PWM isolated circuit
Tips for PCB layout
In the PCB layout, it should be noted that a 0.1μF bypass capacitor is required between VDD1 and GND1, and between VDD2 and GND2 of the NSI824x device and that the capacitor should be placed as close to the package as possible. In the front of the recommended PCB layout, it should be ensured that there are no planes, traces, bonding pads, and via holes in the space under the chip.
Front and back of recommended PCB layout
In case of excessively high system noise, users can also place a resistor (50-300Ω) connected in series with the input and output for enhanced robustness of their design. A series resistor can also improve system reliability, for example, latch-up immunity. The typical output impedance of the isolator drive channel is about 50Ω (±40%). When the drive transmission line affects the load, the output pin should be appropriately terminated with a PCB trace having controlled impedance.
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Standex-Meder（斯丹麦德）干簧继电器与光耦合器选型指南（英文）
Company profile and REED RELAY SOLUTIONS Reed Relay Technology Reed Relay Selection Guide Optocoupler Selection Guide Ecars and Alternative Energy Reed relays Test and Measurement Reed relays Use in Medical Reed relays Application
STANDEX-MEDER - OPTOCOUPLERS,HIGH DENSITY BOARDS,RELAY MODULES,REED RELAYS,OPTOCOUPLER,干簧继电器,REED RELAYS,OPTOCOUPLERS,REED RELAY,RELAY MODULES,光耦元件,HI,HM,BT00-2A00,SIL00-0X00-00XHR,CRF00-1AX-(250),HF00-1A-54-0,SPL,SHC,H00-1X00,SIL RF,RM05-4A,SHV,HM00-1X00-000,DIL-CL1A00-0000-000,MS,HI00-1A00,NP-CL / DIL-CL,DIL00-0X00-00X,MRX00-0X00,KT00-1A-40X-XXX,MS00-1A87-75XXX,SHC00-1A82-78X,KT SERIES,521,522,CRF,567,SIL,525,DIP00-0X00-00XHR,UMS,528,CRR,BE,DIP / SIL,H,SIL00-1X00-00XXX,BT/BTS,BTS00-2A00,MRX,530,RM05-4AS-0/0,535,NP-CL1A00-0000-000,DIP00-0X00 -00X,BE00-0X00-X,SHV00-1A85-78X0K,DIL,KT,DIP,UMS05-1A80-75XXX,LI00-1A00,RM05-8A-SP,HE00-0X00-000,BE/MRE,MRE00-0X00-X,HE,LI,CRR00-1AX-(250),HF,SIL00-1A72-74X,集成电路测试仪,光伏系统,OIL PRODUCTION,MULTIPLEXERS,汽车,SMART METERING,电池调节,ELECTRONICS,CABLE HARNESSES TESTERS,地热和地震仪器,SECURITY,GEOTHERMAL INSTRUMENTATION,AUTOMOTIVE,LAB CAPABILITIES,MINING,自动体外除颤器,AUTOMATED TEST EQUIPMENT,AEROSPACE,TEST,太阳能逆变器,配电,混合动力汽车,AUTOMATED & PRECISION TEST EQUIPMENT,数码产品,多路复用器,TEST & MEASUREMENT,HOUSEHOLD,ELECTRIC VEHICLES,HYBRID VEHICLES,POWER DISTRIBUTION,PV SYSTEMS,AUTOMATED EXTERNAL DEFIBRILLATORS,测试与测量,EV,BATTERY MANAGEMENT SYSTEMS,ELECTRIC POWER,INTEGRATED CIRCUIT TESTERS,ISOLATION FUNCTIONS,油气生产,BATTERY CONDITIONING,ALTERNATIVE ENERGY,INSULATION TESTERS,MEDICAL,RENEWABLE ENERGY,MEASUREMENT,AUTOMATIVE AND PRECISION TEST EQUIPMENT,SEISMIC INSTRUMENTATION,INDUSTRIAL,TRANSPORTATION,OSCILLOSCOPES,HF SURGICAL GENERATORS,EMBEDDED PCB TESTER,高绝缘测量,电池管理系统,ISOLATION FUNCTIONS TEST,外科发电机,ANY NON-ARCING ENVIRONMENT,SOLAR INVERTERS,高密度矩阵,电动汽车,SAFETY,MILITARY,SMART GRID,INTRINSIC SAFETY,HIGH INSULATION MEASUREMENT,自动化和精密测试设备,SEMICONDUCTOR TESTERS,DMM,医疗设备,ELECTRIC UTILITIES,ELECTRONICS FOR MINING,DIGITAL MULTIMETER,MEDICAL EQUIPMENT,DATA SELECTORS,MATRIX SWITCHES,TESTING,HIGH DENSITY MATRICES INTRINSIC SAFETY,OIL&GAS PRODUCTION,APPLIANCES,可再生能源,矿业,本质安全,MANUFACTURING,GAS PRODUCTION,GEOTHERMAL & SEISMIC INSTRUMENTATION,SURGICAL GENERATORS,HIGH DENSITY MATRICES,ENGINEERING
3PEAK Isolation Products Are Certified to a Full Range of Safety Standards Including VDE, TÜV, UL, CSA, CQC, and CB
3PEAK has launched product families for digital isolators, isolation interfaces, isolation sampling, and isolation drive, which have been recognized by the market and customers. In addition, 3PEAK automotive isolation products have all passed the third-party AEC-Q100 reliability certification.
CMOS数字隔离器取代工业应用中的光耦合器
本文探讨了工业应用中CMOS数字隔离器如何取代光耦器。文章首先介绍了工业环境对隔离电路的要求，以及光耦器在可靠性方面的局限性。接着，详细比较了光耦器和CMOS数字隔离器的结构和工作原理，突出了CMOS数字隔离器在尺寸、速度、可靠性、功耗和成本方面的优势。文章还讨论了CMOS数字隔离器的制造工艺、信号路径、系统考虑因素，包括绝缘可靠性、安全认证、功耗、时序特性和共模瞬态免疫等。最后，通过实际应用案例展示了CMOS数字隔离器在工业应用中的优势。
SILICON LABS
Digital Isolator Devices That Can Protect 24 V Digital Inputs ＆ Outputs in Industrial Environments
Harsh, noisy environments and various unknown factors can all contribute to design challenges that affect digital channel reliability, resulting in possible circuit damage, downtime, and system failure. Silicon Labs‘ Si834x and Si838x digital isolator devices can mitigate the design challenges specific to industrial digital channels.
Si80xx-1kV 1kV三至六通道数字隔离器
本资料介绍了Silicon Labs公司生产的Si80xx系列低功耗数字隔离器。这些器件采用CMOS技术，提供高速数据传输、精确时序、宽工作电压范围和高电磁免疫能力等特点。它们适用于工业自动化系统、医疗电子、混合动力汽车和通信系统等领域。
SILICON LABS - 1 KV THREE TO SIX-CHANNEL DIGITAL ISOLATORS,CMOS DEVICES,1千伏三至六通道数字隔离器,CMOS器件,SI8040AA-B-IU,SI8035AA-B-IU,SI8055,SI8050,SI8030AA-B-IU,SI8030,SI8035,SI805X,SI803X,SI80XX-1KV,SI8065,SI80XX,SI8055CA-B-IU,SI8045,SI8040,SI8055AA-B-IU,SI8050CA-B-IU,SI8040CA-B-IU,SI8045AA-B-IU,SI806X,SI804X,SI8045CA-B-IU,I8065CA-B-IU,SI8050AA-B-IU,SI8065AA-B-IU,SI8030CA-B-IU,SI8035CA-B-IU,COMMUNICATION SYSTEMS,HYBRID ELECTRIC VEHICLES,工业自动化系统,医学电子学,INDUSTRIAL AUTOMATION SYSTEMS,隔离型ADC,POWER INVERTERS,ISOLATED ADC,ISOLATED DAC,通信系统,MEDICAL ELECTRONICS,混合动力汽车,功率逆变器,隔离DAC
继电器和光耦应用概述
WAGO - 继电器,OPTOCOUPLERS,固态继电器,SOLID-STATE RELAY,RELAYS,光耦元件,859-744,788-390,857-368/006-000,788-391,859-708,859-706,788-354,859-702,788-312,788-357,788-700,788-701,788-906,859-392,859-390,859-359,859-756,859-798,859-314,859-795,859-796,859-752,859-794,859-398,857-368,857-369,788-384,788-341,857-724,859-758,789 SERIES,788-346,788-616,858-324,859-720,859-762,859-761,789-1341,857-314,789-1346,857-714,857-359,788-412,788 SERIES,788-721,857-358/006-000,858-518,859 SERIES,858 SERIES,857 SERIES,858-354,858-355,858-314,789-324,789-325,858-391,789-323,857-704,788-720,858-308,858-304,计数器,LINE CAPACITY,弱感应负载,压缩空气阀,电源电压,信号放大,对于正常或更高功率,TRIAC OUTPUTS FROM CONTROLLERS,GALVANIC ISOLATION,SUPPLY VOLTAGE,控制器仪表和控制,双线传感器,RAILWAY,铁路,感应交流负载,PARCEL LOAD DETECTION,INRUSH CURRENTS,2-LINE SENSORS,工业,INDUCTIVE AC LOADS,LEVEL MEASUREMENT,电流隔离,控制器的TRIAC输出,楼宇自动化,BUILDING AUTOMATION,FOR NORMAL OR HIGHER POWER,阻力负荷,COUNTER,液位测量,INDUSTRIAL,SIGNAL AMPLIFI CATION,线路容量,涌流,WEAK INDUCTIVE LOADS,COMPRESSED-AIR VALVE,RESISTANCE LOADS,CONTROLLER INSTRUMENTATION AND CONTROL,包裹装载检测
Si864x低功耗四通道数字隔离器数据表
该资料介绍了硅实验室（Silicon Labs）的Si864x系列超低功耗四通道数字隔离器。这些器件提供高速数据传输、宽工作电压范围、高隔离耐压和多种安全认证，适用于工业自动化系统、医疗电子、汽车电子等领域。
SILICON LABS - 低功耗四通道数字隔离器,LOW-POWER QUAD-CHANNEL DIGITAL ISOLATORS,SI8642BB-B-IU,SI8641BB-B-IS,SI8642BB-B-IS,SI8641BB-B-IU,SI8640BD-AS,SI8642ET-IS,SI8645BA-B-IU,SI8640BC-AS1,SI8642EB-B-IU,SI8642BB-B-IS1,SI8640EB-B-IU,SI8641BD-B-IS2,SI8645BB-B-IS,SI8642ET-AS,SI8645BB-B-IU,SI8640BB-B-IU,SI8640BB-B-IS,SI8641ED-B-IS2,SI8645BB-B-IS1,SI8640ED-B-IS2,SI8641ET-IS,SI8642EA-B-IU,SI8640BT-IS,SI8642ED-AS2,SI8642BD-AS2,SI8640BD-B-IS,SI8641BD-AS,SI8641ET-AS,SI8642BA-B-IU,SI8640BT-AS,SI8640BA-B-IU,SI8642BD-B-IS,SI8645BB-AS,SI8640BA-AU,SI8642BB-AS,SI864X,SI8645BB-AU,SI8640ED-B-IS,SI8642ED-B-IS,SI8645BB-AS1,SI8641ED-AS,SI8640BB-AS,SI8640EC-B-IS1,SI8641BB-B-IS1,SI8642ED-AS,SI8640EC-AS1,SI8641BT-IS,SI8640BD-B-IS2,SI8645ET-IS,SI8641BT-AS,SI8640BB-AU,SI8645ET-AS,SI8642ED-B-IS2,SI8641BA-B-IU,SI8642EA-AU,SI8641BA-AU,SI8640BC-B-IS1,SI8645BD-B-IS,SI8641BD-B-IS,SI8641EC-AS1,SI8641BC-AS1,SI8641BB-AU,SI8645BT-AS,SI8645BC-B-IS1,SI8641ED-AS2,SI8641EC-B-IS1,SI8640BB-AS1,SI8645BT-IS,SI8642EB-AU,SI8641BA-C-IU,SI8642BA-C-IU,SI8641EB-AU,SI8642EC-AS1,SI8645BA-AU,SI8640EB-AU,SI8642BC-AS1,SI8642BB-AU,SI8641BC-B-IS1,SI8640BB-B-IS1,SI8641EB-B-IU,SI8642EC-B-IS1,SI8642BA-AU,SI8640ET-IS,SI8642BT-AS,SI8641BD-AS2,SI8642BT-IS,SI8641BB-AS,SI8642BB-AS1,SI8645BC-AS1,SI8642BD-B-IS2,SI8640ED-AS2,SI8640BD-AS2,SI8640ED-AS,SI8641BB-AS1,SI8645BA-C-IU,SI8642BC-B-IS1,SI8645BD-AS,SI8640ET-AS,SI8642BD-AS,SI8641ED-B-IS,电机控制,CHARGING STATIONS,工业自动化系统,医学电子学,电池管理系统,HYBRID ELECTRIC VEHICLES,INDUSTRIAL AUTOMATION SYSTEMS,POWER INVERTERS,ISOLATED ADC, DAC,车载充电器,电池电动汽车,MEDICAL ELECTRONICS,混合动力汽车,ON-BOARD CHARGERS,牵引逆变器,隔离开关模式电源,TRACTION INVERTERS,MOTOR CONTROL,BATTERY ELECTRIC VEHICLES,隔离的 ADC、DAC,COMMUNICATIONS SYSTEMS,ISOLATED SWITCH MODE SUPPLIES,BATTERY MANAGEMENT SYSTEMS,充电站,通信系统,功率逆变器
Si844x/5x QSOP FOUR AND FIVE-CHANNEL DIGITAL ISOLATORS
本资料介绍了Silicon Labs公司的Si844x/5x系列数字隔离器。这些产品具有高速操作能力，最高可达150 Mbps的数据速率，并支持高达1000 VRMS的隔离电压。它们采用CMOS技术，提供低功耗、宽工作电压范围和多种安全认证，适用于工业自动化系统、电机控制、开关模式电源、功率逆变器、ADC/DAC隔离等领域。
SILICON LABS - FIVE-CHANNEL DIGITAL ISOLATORS,四通道数字隔离器,五通道数字隔离器,FOUR-CHANNEL DIGITAL ISOLATORS,SI8455BA-B-IU,SI84XXXB,SI8642BA-C-IU,SI845X,SI844X,SI8442BX,SI84XYSV,SI8442,SI84,SI8655BA-C-IU,SI8455,SI84XX,SI8442BA-D-IU,SI845XAX,SI8455BX,SI845XBX,INDUSTRIAL AUTOMATION SYSTEMS,隔离的 ADC、DAC,COMMUNICATIONS SYSTEMS,POWER INVERTERS,ISOLATED SWITCH MODE SUPPLIES,隔离开关模式电源,电机控制,ISOLATED ADC, DAC,通信系统,工业自动化系统,MOTOR CONTROL,功率逆变器
带DC-DC转换器的Si88x4x四位数字隔离器
该资料介绍了Si88xx系列四通道数字隔离器，集成了硅实验室的数字隔离技术和片上隔离直流-直流转换器。这些设备提供高达5瓦的峰值输出功率，支持3.3伏或5.0伏（或大于5伏）的稳压输出电压。产品具有高速数据传输能力，传播延迟低，尺寸小且可靠性高。
SILICON LABS - QUAD DIGITAL ISOLATORS,DC-DC CONVERTER,四位数字隔离器,DC-DC变换器,SI88X4X,SI88441ED-IS,SI88341ED-IS,SI88241ED-IS,SI88642EC-IS,SI88243BD-IS,SI88244BC-IS,SI88442EC-IS,SI88342EC-IS,SI88242EC-IS,SI88242BD-IS,SI88440ED-IS,SI88640ED-IS,SI88340ED-IS,SI88240ED-IS,SI88341EC-IS,SI88344EC-IS,SI88642ED-IS,SI88342EC-AS,SI88241BD-IS,SI88242ED-IS,SI88244BD-IS,SI88442ED-IS,SI88440EC-IS,SI88640EC-IS,SI88242BC-IS,SI88243EC-IS,SI88443EC-IS,SI88643EC-IS,SI88240EC-IS,SI88444ED-IS,SI88644ED-IS,SI88340EC-IS,SI88240BD-IS,SI88244ED-IS,SI88344ED-IS,SI88241BC-IS,SI88241EC-IS,SI88443ED-IS,SI88643ED-IS,SI88243ED-IS,SI88343ED-IS,SI88241EC-AS,SI88644EC-IS,SI88441EC-IS,SI88641EC-IS,SI88244EC-IS,SI88240BC-IS,SI88444EC-IS,SI88243BC-IS,SI88342ED-IS,SI88241ED-AS,SI88642EC-AS,SI88343EC-IS,车辆通信总线,分布式控制系统,电机控制,INDUSTRIAL APPLICATIONS,INVERTERS,工业自动化系统,医学电子学,电池管理系统,INDUSTRIAL AUTOMATION SYSTEMS,可编程逻辑控制器,MEDICAL ELECTRONICS,AUTOMOTIVE APPLICATIONS,DISTRIBUTED CONTROL SYSTEMS,牵引逆变器,隔离开关模式电源,TRACTION INVERTERS,HYBRID ELECTRIC AND ELECTRIC VEHICLES,VEHICLE COMMUNICATION BUSSES,PLCS,汽车应用,DATA ACQUISITION,混合动力电动汽车,MOTOR CONTROL,逆变器,ISOLATED SWITCH MODE SUPPLIES,BATTERY MANAGEMENT SYSTEMS,工业应用,数据采集
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品牌：荣湃半导体
品类：LED EMULATOR INPUTOPEN COLLECTOR OUTPUT ISOLATORS
价格：￥1.7500
现货： 165
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