On the Fast Lane: NOVOSENSE's Ongoing Commitment to Automotive Chip Excellence

发布时间：2024-04-17 13:24
作者：AMEYA360
来源：novosns
阅读量：540

　　Automobiles are undergoing increasing electrification and digitalization, from electric drive trains to immersive infotainment systems in the cockpit.

　　NOVOSENSE, a pioneering force in the automotive chips, recently unveiled several groundbreaking products aimed at enhancing performance, reliability, and efficiency in automotive applications.

On the Fast Lane: NOVOSENSE's Ongoing Commitment to Automotive Chip Excellence

　　NCA1462-Q1, an automotive-qualified CAN SIC based on innovative ringing suppression patent

　　NCA1462-Q1 is based on its proprietary innovative ringing suppression patent. Compared with CAN FD solution, NCA1462-Q1 is further compatible with the CiA 601-4 standard on the premise of meeting the ISO 11898-2:2016 standard, and can achieve a data rate of ≥8Mbps. With NOVOSENSE's patented ringing suppression function, NCA1462-Q1 maintains good signal quality even in the case of star network multi-node connection; in addition, its ultra-high EMC performance and more flexible VIO as low as 1.8V can effectively help engineers simplify system design and create high-quality automotive communication system.

　　NSHT30-Q1, a relative humidity (RH) and temperature sensor based on CMOS-MEMS

　　NSHT30-Q1 integrates a complete sensor system on a single chip, including a capacitive RH sensor, CMOS temperature sensor and signal processor, and an I2C digital communication interface. It is designed in DFN package with Wettable Flank, and the product size is 2.5mm×2.5mm×0.9mm. NSHT30-Q1's I2C interface features two selectable addresses with communication speed up to 1 MHz and supports a wide supply voltage range of 2.0V~5.5V.

　　NSOPA9xxx series, general-purpose operational amplifiers for automotive applications

　　NSOPA9xxx series is suitable for 40V high voltage and offers a variety of product models with bandwidth option of 1MHz/5MHz/10MHz and 1/2/4-channel. It meets the reliability requirements of AEC-Q100 Grade 1, and can operate from -40°C to 125°C. Different package versions are available to meet different customer needs: SOT23-5, SOP-8 for 1-channel; MSOP-8, SOP-8 for 2-channel; and TSSOP-14, SOP-14 for 4-channel.

　　NSD3604/8-Q1, a new automotive-qualified 4/8-channel multi-channel half-bridge driver

　　NSD3604/8-Q1 can drive multiple loads and is used in automotive domain control architecture. It covers 4/8-channel half-bridge drive which can drive 4 DC brushed motors, and achieve multi-channel high-current motor drive, and also be used as a multi-channel high-side switch drive. NSD3604/8-Q1 is suitable for multi-motor or multi-load applications, such as car window lifting, electric seats, door locks, electric tailgates, and proportional valves and other body control applications.

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NSM211x Series High-Precision AEC-Q100 Current Sensors Eliminate Need for External Isolation Components
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NSM211x Series High-Precision AEC-Q100 Current Sensors Eliminate Need for External Isolation Components

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2024-11-15 14:30 阅读量：259
400mA, High Output Slew Rate: NOVOSENSE's NSOPA240x Series Cracks the Challenge of Resolvers
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400mA, High Output Slew Rate: NOVOSENSE's NSOPA240x Series Cracks the Challenge of Resolvers

　　With the continuous pursuit of high-precision, high-performance motor control technology, the ability of resolvers, as one of its core components, to accurately measure angular position and rotational speed becomes particularly important.　　However, the special requirements of resolver drive circuits have always been a technical bottleneck in the development of the industry. To address this challenge, NOVOSENSE recently released the new NSOPA240x series of operational amplifier, which is designed to simplify circuit design and improve system robustness, bringing innovative solutions to resolver drive applications.　　As electromagnetic sensors that can be used to accurately measure angular position and rotational speed, resolvers are widely used in industrial motor controls, servos, robots, and powertrain units in electric and hybrid vehicles. 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2024-07-01 13:47 阅读量：281
novosns：Technical Sharing | The Introduction of Gate Drivers and the Applications
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novosns：Technical Sharing | The Introduction of Gate Drivers and the Applications

　　1) Introduction of the Gate Drivers　　Gate driver is a buffer circuit between the low-voltage controller and the high-power circuit, which is used to amplify the control signals of the controller for more effective turn-on and turn-off of power devices.　　1. The functions of gate driver are as follows　　- Gate driver can convert the low-voltage signal from the controller to higher-voltage drive signal, so as to achieve stable turn-on and turn-off of power devices.　　- Gate driver can provide transient source and sink peak currents, which can improve the switching speed of power devices and reduce the switching loss.　　- Gate driver can effectively isolate the noise of high-power circuits and protect sensitive circuits against interference.　　- Gate driver typically integrates protection functions to effectively prevent damages to power devices.　　It can be seen that gate driver is used to ensure better performance of power devices in the system.　　2. 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Isolated drivers are mainly used in high-voltage systems, such as electric drives, photovoltaic inverters, and OBCs. Currently, NOVOSENSE offers NSI6602 dual-channel isolated driver IC, NSI6601/NSI6601M single-channel isolated driver IC, NSI6801 opto-compatible isolated single-channel driver IC, and NSI6611/NSI68515 smart isolated driver IC.　　2) Introduction to Isolation Solutions　　In a high-voltage power system, there is usually isolation between high voltage and high voltage, as well as between high voltage and low voltage. Why is isolation driver needed? First, an isolated driver can avoid harm to human body caused by high-voltage electricity, and meet safety standards through isolation. Second, it can protect the control system from damages that can be caused by lightning strikes and high voltage transients. Third, an isolated driver can eliminate ground loops and reduce interference from the high voltage side to the low voltage side. Fourth, it can realize voltage or current change and energy transfer.　　There are three commonly used isolation schemes. The first is optocoupler isolation, which achieves signal transmission through light-emitting diodes and phototransistors. This isolation scheme is low-cost, but provides weak CMTI (Common Mode Transient Immunity), limited temperature range, and short service life. The second isolation scheme is magnetic isolation, where the chip integrates micro-transformer and electronic circuit to achieve signal transmission. The magnetic isolation chips deliver benefits such as long lifetime, wide temperature range, and strong CMTI, but involve complex technology, high cost, and prominent EMI issue. The third isolation scheme is capacitive isolation, which achieves signal transmission through isolation capacitors and electronic circuits. It usually uses silicon dioxide (SiO2) as the insulating material. The capacitive isolation scheme features low cost, long isolation life, wide temperature range, and strong CMTI. NOVOSENSE adopts the capacitive isolation scheme.　　NOVOSENSE isolation solution　　Isolated driver ICs from NOVOSENSE usually have two dies – the primary die on the input side and the secondary die on the output side. There is a physical isolation between the dies. Two isolation capacitors are connected in series on the die to achieve double insulation capability. If one of the dies experiences an EOS failure, the driver IC can still maintain basic insulation capability. The top and bottom substrates of the two isolation capacitors are insulated using SiO2, which can ensure stable material properties, good chip consistency, and long isolation life. The top substrates of the two isolation capacitors are connected by metal wires for signal transmission. 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2024-06-21 11:23 阅读量：522
novosns：Must-Know Basic Facts about Digital Isolators
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novosns：Must-Know Basic Facts about Digital Isolators

　　Electrical isolation is a crucial concept in the design of electrical systems. Through the isolation of the high and low voltage systems, the following important functions can be achieved:　　1.Make the high and low voltage systems independent of each other and improve the anti-interference capability of the low voltage system;　　2.Ensure safe interaction between the high and low voltage systems so that the systems can work safely;　　3.Protect users' personal safety by avoiding electric shock from the high voltage.　　In this Technical Sharing, the basics of electrical isolation will be introduced in detail, including: the definition and importance of electrical isolation, the classification and definition of isolation levels, and the standards and specifications for isolator certification.(Click here to watch the video　　Definition and Importance of Electrical Isolation　　Electrical isolation uses isolators to prevent destructive electrical signals from being transmitted between high/low voltage subsystems, while allowing safe electrical signals required for system operation to interact between high/low voltage systems. Three system interaction scenarios are discussed below:　　1.When two low voltage systems interact, electrical signals can be freely transmitted between the two systems. In this state, we usually consider the systems to be working safely.　　2.When high/low voltage systems interact directly without isolators, due to the high potential difference between the high voltage system and the low voltage system, the high voltage system may transmit destructive electrical signals to the low voltage system, which will cause the low voltage system to malfunction and even cause permanent damage to the low voltage system. This will not only affect the functional safety of the systems, but also endanger personal safety and lead to major safety accidents.　　3.After using an isolator for electrical isolation between the high and low voltage systems, destructive electrical signals are blocked by the isolator. Safe electrical signals required for normal system operation interact between the high and low voltage systems, ensuring the functional safety of the systems.　　Classification and Definition of Isolation Levels　　Based on different isolation performance, electrical isolation is divided into different isolation levels. Functional isolation, basic isolation, dual isolation, and reinforced isolation are among typical isolation levels:　　1. Functional isolation can only achieve the isolation necessary for normal device operation and does not have the function of electric shock protection, such as the PCB materials on the circuit boards.　　2. Basic isolation only provides single-stage isolation and can achieve isolation while the insulation layer is intact. But once the insulation layer fails, the system will be at risk of electric shock. Under normal circumstances, the isolation voltage that basic isolators can isolate is around 3kV, and there are a few basic isolators whose isolation voltage can reach 5kV.　　3. Dual isolation adds a layer of isolation on the basis of basic isolation to achieve system redundancy. It can ensure system security when single-stage isolation fails. In this way, the isolation voltage can reach 5kV and above.　　4. Reinforced isolation is also single-stage isolation, but it can achieve the same isolation strength as dual isolation.　　Standards and Specifications for Isolator Certification　　Currently, most common isolators adopt basic and reinforced isolation. In order to be certified for the two isolation levels, the performance of isolators needs to comply with regional codes and safety standards.　　In terms of isolator standards and certifications, the International Electrotechnical Commission (IEC) is the earliest non-governmental international electrotechnical standardization organization in the world. IEC works with organizations in multiple regions to develop international safety standards for electrical/electronic devices. In different regions, local standards are developed by different organizations. For example, the United States, Canada, Germany, and China all have local organizations.　　Isolators must meet local standards before they can be legally marketed commercially and the electrical/electronic products fitted with them can be sold to customers. Typically, the first page of an isolator datasheet will list standards that the isolator has passed. The reinforced isolation level of digital isolators is mainly proposed by VDE and promoted by IEC as a global standard. NOVOSENSE is a leader of digital isolators in China and also the first semiconductor company to obtain the VDE enhanced isolation certification.　　Under the current VDE standards, both basic and reinforced isolators have corresponding test standards and parameter specifications.　　In the maximum surge voltage test, both basic and reinforced isolators are required to pass 50 bipolar surge impulses, and the final measured voltage must not exceed 1.3 times the maximum surge voltage in the datasheet, on top of which reinforced isolators are required to pass a surge voltage test of at least 10kV.　　In applications, partial discharge phenomenon occurs when there are defects inside a device. which does not affect the insulation strength in short time. However, under the repeated impact of high voltage, the defect will eventually lead to the breakdown of the isolation barrier. Therefore, these defects need to be detected through non-destructive testing. Basic isolators need to pass the 1.5 times VIOSM surge test, while partial discharge testing of reinforced isolators needs to be conducted at 1.875 times VIOSM voltage.　　According to the working life of chips at different temperatures and voltages, the working voltage of chips under the minimum rated life and failure rate during the target life can be fitted by Weibull distribution, and then VIORM and VIOSM can be obtained according to the requirements of the VDE correlation coefficients. It can also be seen from the table that reinforced isolators have a longer working life and a lower failure rate during their life.　　After passing the above tests, isolators are deemed to have met the requirements for VDE certification.　　To sum up, electrical isolation involves the working safety of devices and the personal safety of users, and is an indispensable part of electrical system design.
2024-04-09 11:58 阅读量：576
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