ROHM’s New <span style='color:red'>TVS</span> Diodes: Supporting High-Speed CAN FD In-Vehicle Communication Systems for Autonomous Driving
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ROHM’s New TVS Diodes: Supporting High-Speed CAN FD In-Vehicle Communication Systems for Autonomous Driving

　　ROHM has developed bidirectional TVS (ESD protection) diodes compatible with CAN FD (CAN with Flexible Data rate) high-speed in-vehicle communication. Such protocols are seeing an increased demand in line with the ongoing advancement in autonomous driving and advanced driver assistance systems (ADAS). CAN FD is a crucial communication technology for safe, real-time data transmission between ECUs (Electronic Control Units) in vehicles. The new products achieve high-quality in-vehicle transmission by protecting electronic devices such as ECUs from surges and electrostatic discharge (ESD) while maintaining signal integrity in high-speed communication systems such as CAN FD.　　The rapid evolution of autonomous driving technology and ADAS is boosting the demand for faster, more reliable automotive communication. Autonomous driving in particular requires quick and accurate processing of vast amounts of data from sensors such as cameras, LiDAR and radar - leading to the adoption of CAN FD that enables faster, higher capacity data transfer compared to traditional CAN used in automotive communication.　　At the same time, to achieve high-speed in-vehicle communication, it is necessary to ensure stable transmission even under harsh environments. This has led to a growing demand for protection components that offer low terminal capacitance along with superior surge current rating and clamping voltage performance. As a result, the market for TVS diodes for automotive communication is expected to continue to grow in the future.　　To meet market needs, ROHM developed the ESDCANxx series that combines low terminal capacitance with excellent surge tolerance. Two package types are available: SOT-23 (2.9mm × 2.4mm) and DFN1010 (1.0mm × 1.0mm), both supporting standoff voltages (VRWM) of 24V and 27V. The SOT-23 package includes four models: 24V ESDCAN24HPY / ESDCAN24HXY and 27V ESDCAN27HPY / ESDCAN27HXY. Similarly, the DFN1010 package is also offered in four models: 24V ESDCAN24YPA / ESDCAN24YXA and 27V ESDCAN27YPA / ESDCAN27YXA, totaling 8 products in the lineup.　　The new products feature an optimized element structure that reduces terminal capacitance to a maximum of 3.5pF, preventing signal degradation during high-speed communication. High surge tolerance is also achieved, significantly improving the protection of electronic devices in automotive environments. For example, the 27V products of the DFN1010 package delivers approx. 3.2 times higher surge current rating and 16% lower clamping voltage compared to standard CAN FD-compatible products. This effectively safeguards expensive surge-sensitive electronic devices such as in-vehicle ECUs, ensuring high reliability even under harsh automotive environments. Going forward, ROHM will continue to develop products that support even faster in-vehicle communication in autonomous driving and communication environments - contributing to realizing a safer, more advanced mobility society.　　Application Examples        • Autonomous driving and Advanced Driver Assistance Systems (ADAS)　　• Automotive electric powertrain systems　　• In-vehicle infotainment systems　　Online Distributor Information        Sales Launch Date: December 2024　　Pricing: $0.9/unit (excluding tax)　　Target Products　　SOT23 Package: ESDCAN24HPY, ESDCAN24HXY, ESDCAN27HPY, ESDCAN27HXY　　DFN1010 Package: ESDCAN24YPA, ESDCAN24YXA, ESDCAN27YPA, ESDCAN27YXA　　Terminology         CAN FD (CAN with Flexible Data Rate)　　An extension of the CAN (Controller Area Network) standard, CAN FD offers faster data transfer speeds compared to conventional CAN, enabling the exchange of large volumes of data. Real-time communication between multiple in-vehicle electronic units (ECUs) is essential in systems like autonomous driving and ADAS.　　TVS Diode (Transient Voltage Suppression Diode)　　A semiconductor device designed to protect circuits from overvoltage, surges, and electrostatic discharge (ESD). TVS diodes absorb sudden voltage and current spikes (surges) to prevent circuit damage and malfunction. In automotive environments, safeguarding against severe electrical fluctuations is crucial.　　Terminal Capacitance　　Unwanted capacitance components that arise in electronic parts. When terminal capacitance is high, signal degradation occurs during high-speed transmission, making it important to reduce terminal capacitance for in-vehicle communication　　Surge Current Rating　　The maximum surge current a TVS diode can withstand. The higher the surge current rating, the stronger the protection against severe electrical fluctuations in automotive environments.　　Clamping Voltage　　The voltage maintained in the circuit when the TVS diode suppresses overvoltage caused by surges or other transient events. A lower clamping voltage provides more effective protection for circuits and devices, increasing the reliability of automotive equipment.
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Release time：2025-03-11 09:29 reading：268 Continue reading>>
What are <span style='color:red'>TVS</span> diodes in safeguarding electronics
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What are TVS diodes in safeguarding electronics

　　In today’s interconnected world, electronic devices and systems are ubiquitous, powering our homes, workplaces, and communication networks. However, these devices are vulnerable to voltage transients—brief surges in voltage that can occur due to lightning strikes, electrostatic discharge (ESD), or switching transients in the electrical system.　　To protect sensitive electronic components from such transients, Transient Voltage Suppressor TVS diodes play a crucial role. This article explores the functionality, applications, and importance of TVS diodes in safeguarding electronics.　　What is a Transient Voltage Suppressor (TVS) Diode?A Transient Voltage Suppressor (TVS) diode is a semiconductor device used to protect sensitive electronic components from voltage spikes or transient voltages that could potentially damage them. These spikes can be caused by events such as lightning strikes, electrostatic discharge (ESD), or switching transients in the electrical system.　　The TVS diode operates by providing a low-impedance path to divert excess voltage away from the protected components, thus limiting the voltage across them. When a transient voltage exceeds the breakdown voltage (also known as the clamping voltage or avalanche voltage) of the TVS diode, it starts to conduct, effectively shunting the excess current away from the protected circuit.　　What are the features of TVS diodes?Fast Response Time: TVS diodes respond quickly to transient events, providing protection within nanoseconds to microseconds.　　Low Clamping Voltage: The clamping voltage is the maximum voltage that the TVS diode allows to pass through to the protected circuit. It is typically lower than the voltage tolerance of the protected components, ensuring they remain safe.　　High Surge Current Capability: TVS diodes are designed to handle high surge currents associated with transient events, protecting the circuit from damage.　　Low Leakage Current: When not conducting, TVS diodes have low leakage current, minimizing power consumption and ensuring minimal impact on the protected circuit during normal operation.　　Robustness: TVS diodes are robust devices, able to withstand multiple transient events without degradation in performance.　　What are the applications of TVS diode?TVS diodes are commonly used in various applications, including:　　Protection of integrated circuits (ICs), microcontrollers, and other semiconductor devices from ESD and voltage transients.　　Protection of communication ports (such as USB, Ethernet, HDMI) and data lines in electronic equipment.　　Surge protection for power supply lines, signal lines, and sensor inputs in industrial and automotive electronics.　　Protection of sensitive electronic equipment against lightning-induced surges in telecommunications, power distribution, and other infrastructure.　　What’s the difference between TVS Diodes and Zener Diodes?TVS (Transient Voltage Suppressor) diodes and Zener diodes are both semiconductor devices used for voltage regulation, but they serve different purposes and operate in different ways. Here are the key differences between TVS diodes and Zener diodes:　　Purpose:　　• TVS Diodes: TVS diodes are primarily used for transient voltage suppression, meaning they protect electronic circuits from voltage spikes or transients caused by events like lightning strikes, electrostatic discharge (ESD), or inductive switching. Their main function is to provide surge protection and prevent damage to sensitive components.　　• Zener Diodes: Zener diodes are used for voltage regulation and voltage reference. They operate in the breakdown region and maintain a constant voltage across their terminals when reverse biased. Zener diodes are commonly used in voltage regulation circuits, voltage clamping circuits, and voltage reference circuits.　　Operating Principle:　　• TVS Diodes: TVS diodes operate by avalanche breakdown or Zener breakdown. When the voltage across a TVS diode exceeds its breakdown voltage, it starts to conduct heavily, providing a low-impedance path for excess current and diverting it away from the protected circuit.　　• Zener Diodes: Zener diodes operate in the reverse-biased breakdown region, where they maintain a constant voltage (known as the Zener voltage) across their terminals. They regulate voltage by allowing current to flow in the reverse direction when the applied voltage exceeds the Zener voltage.　　Voltage Characteristics:　　• TVS Diodes: TVS diodes typically have a very low clamping voltage (Vc) and are designed to handle high surge currents associated with transient events. They are optimized for fast response times and high-energy absorption capabilities.　　• Zener Diodes: Zener diodes have a well-defined breakdown voltage (Vz) at which they operate. The voltage across a Zener diode remains relatively constant over a wide range of currents when reverse biased, making them suitable for voltage regulation applications.　　Applications:　　• TVS Diodes: TVS diodes are used in applications requiring protection against voltage transients, such as in power supplies, communication ports (USB, Ethernet), data lines, and electronic equipment exposed to harsh environments or prone to ESD.　　• Zener Diodes: Zener diodes find applications in voltage regulation circuits, voltage references, voltage clamping circuits, reverse voltage protection, and precision voltage measurement circuits.　　How do TVS diodes work?　　TVS diodes work by providing a low-impedance path for excess voltage, diverting it away from sensitive electronic components and limiting the voltage across them to safe levels. They operate based on two main mechanisms: avalanche breakdown and Zener breakdown. Here’s how TVS diodes work:　　Avalanche BreakdownTVS diodes are typically fabricated with a highly doped semiconductor material that has a narrow depletion region. When the diode is reverse-biased (i.e., the voltage applied across it is in the opposite direction of its normal operation), the electric field across the depletion region increases.　　If the applied reverse voltage exceeds a certain threshold known as the breakdown voltage (also called clamping voltage or avalanche voltage), the strong electric field can accelerate charge carriers (electrons and holes) to high energies.　　These high-energy charge carriers collide with other atoms in the semiconductor lattice, generating additional charge carriers through impact ionization. This process cascades, resulting in a sudden increase in current flow through the diode.　　As a result, the TVS diode effectively clamps the voltage across its terminals at the breakdown voltage, providing a low-impedance path for excess current and limiting the voltage seen by the protected circuit.　　Zener BreakdownIn addition to avalanche breakdown, some TVS diodes may also utilize Zener breakdown to provide transient voltage suppression. Zener breakdown occurs when the reverse-biased diode operates in its Zener breakdown region.　　In this region, the diode behaves as a voltage regulator, maintaining a relatively constant voltage (known as the Zener voltage) across its terminals. When the applied reverse voltage exceeds the Zener voltage, the diode starts conducting heavily, effectively clamping the voltage across it.　　What causes a TVS diode to fail?TVS diodes are designed to withstand high levels of transient voltage and provide protection to sensitive electronic components. However, like any electronic component, TVS diodes can fail under certain conditions. Here are some common causes of TVS diode failure:　　Overvoltage Conditions: If the transient voltage exceeds the maximum rated clamping voltage (avalanche or Zener breakdown voltage) of the TVS diode, it may fail to suppress the transient effectively. This can happen if the transient event is exceptionally severe or if the TVS diode is underspecified for the application.　　Overcurrent Conditions: Excessive current flowing through the TVS diode, either due to a high-energy transient event or a sustained fault condition, can cause the diode to fail. Overcurrent can lead to thermal overstress, causing the diode to overheat and potentially short or open circuit.　　Reverse Polarity: Applying a reverse voltage beyond the maximum reverse voltage rating of the TVS diode can cause it to fail. This can occur due to improper installation or incorrect wiring in the circuit.　　End-of-Life Wear-Out: Like all semiconductor devices, TVS diodes have a limited lifespan, and their performance may degrade over time due to factors such as aging, temperature cycling, and electrical stress. As the diode approaches the end of its life, its ability to suppress transients effectively may diminish, leading to failure.　　Excessive Power Dissipation: TVS diodes are specified with maximum power dissipation ratings. Exceeding these ratings, either due to sustained overvoltage conditions or prolonged exposure to transient events, can cause the diode to overheat and fail.　　Manufacturing Defects: Rarely, TVS diodes may fail due to manufacturing defects such as material impurities, processing errors, or incomplete encapsulation. These defects can compromise the electrical and thermal performance of the diode, leading to premature failure.　　Improper Handling or Installation: Mishandling or improper installation of TVS diodes, such as mechanical stress during assembly, soldering defects, or exposure to corrosive environments, can lead to physical damage or degradation of the diode, resulting in failure.　　ConclusionTVS diodes are essential components in protecting electronic devices and systems from voltage transients. Their ability to clamp voltages and divert excess current away from sensitive components plays a vital role in ensuring the reliability and durability of modern electronics. As the demand for high-performance and reliable electronic products continues to grow, the importance of TVS diodes in safeguarding electronics will only increase, making them indispensable in today’s interconnected world.
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Release time：2024-07-16 13:08 reading：565 Continue reading>>
Top 10 Global <span style='color:red'>TVS</span> Diode Manufacturers
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Top 10 Global TVS Diode Manufacturers

　　A transient voltage suppressor, or TVS, is a protective device used to protect circuits from sudden spikes in voltage or current. It mainly uses to protect a circuit from overvoltage through placing these TVS devices in parallel with the circuit.　　In this article, there are the top 10 global TVS diode manufacturers for you to take a reference.　　一、Wurth Electronics　　Wuerth Elektronik ICS offers printed circuit board-based solutions for power boards, display and control panels and electronic controls (ICCS). The company supports its customers in industry and the automotive market from the initial idea to serial production of the product and beyond.　　二、ProTek Devices　　ProTek Devices is a leading semiconductor manufacturer of a wide range of high-performance TVS protection products. Its business scope includes Transient Voltage Suppressor arrays (TVS arrays), Steering Diode/TVS arrays, Steering Diodes, Thyristors, Component Modules, SurgeBuster Modules, Chipscale TVS Arrays and EMI Filter/TVS Arrays.　　三、Maxim Integrated　　Maxim Integrated, a subsidiary of Analog Devices, designs, manufactures, and sells analog and mixed-signal integrated circuits for the automotive, industrial, communications, consumer, and computing markets. Maxim’s product portfolio includes power and battery management ICs, sensors, analog ICs, interface ICs, communications solutions, digital ICs, embedded security, and microcontrollers.　　四、Semtech　　Semtech Corporation is a high-performance semiconductor, IoT systems and Cloud connectivity service provider dedicated to delivering high-quality technology solutions. It offers a broad portfolio of low-capacitance TVS arrays to safeguard high-speed data interfaces from transient voltage threats.　　五、Diodes Incorporated　　Diodes Incorporated (Nasdaq: DIOD) is a leading global manufacturer and supplier of high-quality application-specific standard products within the broad discrete, logic, analog, and mixed-signal semiconductor markets. Diodes serves the automotive, industrial, computing, consumer electronics, and communications markets.　　六、KYOCERA AVX　　KYOCERA AVX is a leading international manufacturer and supplier of a vast portfolio of advanced electronic components, including capacitors, inductors, filters, resistors, couplers, diodes, and circuit protection devices, as well as a broad range of innovative sensors, control, connectors and antenna solutions.　　七、STMicroelectronics　　STMicroelectronics NV (STM) is a manufacturer and provider of semiconductors. The company develops, and markets a wide range of products including discrete and standard commodity components, custom devices and semi-custom devices and application-specific standard and integrated circuits.　　八、Vishay　　Vishay is one of the world’s most trusted manufacturers of electronic components. It manufactures discrete semiconductors and passive electronic components that are essential to innovative designs in the automotive, industrial, computing, consumer, telecommunications, military, aerospace, and medical markets.　　九、Littelfuse　　Founded in 1927, Littelfuse is an American electronic manufacturing company headquartered in Chicago, Illinois. The company primarily produces circuit protection products but also provides power semiconductors, heavy-duty switches, magnetic, optical, electromechanical, and temperature sensors, as well as products that provide safe control and distribution of electrical power.　　十、ON Semiconductor　　ON Semiconductor Corp (Onsemi) is a designer, manufacturer, and supplier of semiconductor products and solutions. The company offers products under Power Solutions Group (PSG), the Advanced Solutions Group (ASG) and the Intelligent Sensing Group (ISG).
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Release time：2023-08-28 15:51 reading：2760 Continue reading>>
Smartphones, TVs Drive Surge in AMOLED Displays
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Smartphones, TVs Drive Surge in AMOLED Displays

　　The value of the global market for active-matrix organic light-emitting diode (AMOLED) panels is expected to reach $25.2 billion in 2017, an increase of 63 percent from 2016, thanks to growing use of AMOLED panels in smartphones and TVs, according to market research firm IHS Markit.　　According to Ricky Park, director of display research at IHS Markit, in addition to smartphones and TVs, the AMOLED panel market will also get a lift from rising demand in  head-mount displays and mobile PCs.　　AMOLED display use has rapidly risen in the smartphone market in particular as the flexible substrate allows phones to be produced in various designs with a lighter and slimmer bodies, IHS Markit said. Leading smartphone makers have competitively rolled out premium phones this year that boast a narrow bezel or nearly bezel-less designs, the firm noted.　　"The AMOLED display market is also expected to get a boost from Apple’s decision to use an AMOLED screen in its iPhone series to be released later this year, and Chinese smartphone makers’ moving to newer applications of AMOLED panels," Park said, in a press statement.　　Park said South Korean and Chinese display makers have been heavily investing in Generation 6 AMOLED fabs in order to increase capacity to meet the surging demand.　　The AMOLED TV panel market, the second largest market for AMOLED displays, is expected to grow to 1.5 million units this year, up from 890,000 units last year, according to IHS Markit's display demand forecast tracker. By 2021, the AMOLED panel market is projected to expand at a compound annual growth rate of 22 percent to exceed $40 billion, IHS Markit predicts.
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Release time：2017-07-07 00:00 reading：1027 Continue reading>>

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