• Latest
  • Trending
  • All
  • Capacitors
  • Resistors
  • Inductors
  • Filters
  • Fuses
  • Non-linear Passives
  • Applications
  • Integrated Passives
  • Oscillators
  • Passive Sensors
  • New Technologies
  • Aerospace & Defence
  • Automotive
  • Industrial
  • Market & Supply Chain
  • Medical
  • RF & Microwave
  • Telecommunication

Varistors for Automotive Ethernet; AVX Technical Paper

28.1.2022

Bourns Releases Semi-shielded Power Inductors

28.6.2022

KYOCERA AVX Launches New Interactive Component Search Tool

27.6.2022

YAGEO Presents Reverse Geometry MLCC with Reduced ESL

27.6.2022

Effects of Harsh Environmental Conditions on Film Capacitors

24.6.2022
  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About
No Result
View All Result
NEWSLETTER
Passive Components Blog
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • Market & Supply Chain
    • Medical
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors
    • Resistors
    • RF & Microwave
    • Telecommunication

    Bourns Releases Semi-shielded Power Inductors

    KYOCERA AVX Launches New Interactive Component Search Tool

    YAGEO Presents Reverse Geometry MLCC with Reduced ESL

    Effects of Harsh Environmental Conditions on Film Capacitors

    Waveguides and Transmission Lines Explained

    Electron microscope images show the precise atom-by-atom structure of a barium titanate (BaTiO3) thin film sandwiched between layers of strontium ruthenate (SrRuO3) metal to make a tiny capacitor. (Credit: Lane Martin/Berkeley Lab)

    Researchers Developed BaTiO3 Ultrathin Ceramic Capacitors for Microchips

    Common-mode Choke Parameters Explained; WE Webinar

    Bourns Releases Power Line Communication (PLC) Transformers

    Murata to Begin Closed-loop Recycling of PET Film Used at MLCC Production

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos
    • Sensors

    Effects of Harsh Environmental Conditions on Film Capacitors

    Common-mode Choke Parameters Explained; WE Webinar

    Ceramic Capacitors Loss Modelling under High DC Bias Voltage and High Current Stress

    MLCC Case Size Impact to Parameters

    NTC Thermistor in Fire Alarm Application LTSpice Simulation

    MLCC Ageing; Samsung Video

    Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

    Coverlay – More than a Flexible Soldermask Substitute; WE Webinar

    Soldering THT Components by SMD Reflow Assembly; WE Webinar

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Preferred Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • Market & Supply Chain
    • Medical
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors
    • Resistors
    • RF & Microwave
    • Telecommunication

    Bourns Releases Semi-shielded Power Inductors

    KYOCERA AVX Launches New Interactive Component Search Tool

    YAGEO Presents Reverse Geometry MLCC with Reduced ESL

    Effects of Harsh Environmental Conditions on Film Capacitors

    Waveguides and Transmission Lines Explained

    Electron microscope images show the precise atom-by-atom structure of a barium titanate (BaTiO3) thin film sandwiched between layers of strontium ruthenate (SrRuO3) metal to make a tiny capacitor. (Credit: Lane Martin/Berkeley Lab)

    Researchers Developed BaTiO3 Ultrathin Ceramic Capacitors for Microchips

    Common-mode Choke Parameters Explained; WE Webinar

    Bourns Releases Power Line Communication (PLC) Transformers

    Murata to Begin Closed-loop Recycling of PET Film Used at MLCC Production

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos
    • Sensors

    Effects of Harsh Environmental Conditions on Film Capacitors

    Common-mode Choke Parameters Explained; WE Webinar

    Ceramic Capacitors Loss Modelling under High DC Bias Voltage and High Current Stress

    MLCC Case Size Impact to Parameters

    NTC Thermistor in Fire Alarm Application LTSpice Simulation

    MLCC Ageing; Samsung Video

    Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

    Coverlay – More than a Flexible Soldermask Substitute; WE Webinar

    Soldering THT Components by SMD Reflow Assembly; WE Webinar

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Preferred Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Varistors for Automotive Ethernet; AVX Technical Paper

28.1.2022
Reading Time: 6 mins read
0 0
0
SHARES
108
VIEWS

When it comes to protecting electrical equipment from high voltage transients, metal oxide varistors (MOVs) are one of the most popular choices. Automotive single-pair ethernet accomplishes high data transfer demand while still adhering to robust EMI and EMC requirements. This paper written by Akihiro Kado and Michael Kirk from AVX Corporation discuss capabilities if varistors and its suitability for automotive ethernet applications.

Introduction

The ubiquity of high-performance sensor systems in modern automobiles (particularly electric and self-driving vehicles) has created immense pressure to develop automotive local area networking (LAN) solutions that offer high bandwidth, low latency, and low cost. Traditional wiring harnesses have become too heavy and complex to support these data and power needs.

RelatedPosts

Bourns Releases Semi-shielded Power Inductors

KYOCERA AVX Launches New Interactive Component Search Tool

YAGEO Presents Reverse Geometry MLCC with Reduced ESL

To date, wired ethernet has taken center stage in this quest, with manufacturers offering physical layer (PHY) devices for single twisted pair data transmission that complies with the latest IEEE 802.3 standards. In particular, considering the data demands of backup video cameras, self-driving cameras, and LIDAR/RADAR object detection systems, the 802.3cg standard has become commonplace, offering 10 Mbps over a 25 m distance using a single twisted pair. In addition to data transfer, the same twisted pair is capable of providing power to sensor subsystems using power over ethernet (PoE) techniques. Most importantly, automotive single-pair ethernet accomplishes this while still adhering to robust EMI and EMC requirements.

The Importance of Varistors

When it comes to protecting electrical equipment from high voltage transients, metal oxide varistors (MOVs) are one of the most popular choices. These devices exhibit a reduction in resistance at high voltages, effectively absorbing the voltage spike and dissipating the energy as heat. Typical varistors are specified by their maximum voltage, the energy they can dissipate, their capacitance, and their response time. When protecting integrated circuits on high-speed data lines, such as an automotive ethernet PHY, capacitance becomes the most critical parameter because it can directly affect the data waveform. Unfortunately, low capacitance generally implies small physical size, and in turn, low voltage and energy ratings. Achieving adequate ESD and EMI protection in a small form factor is a primary challenge for manufacturers today.

AVX Varistors

AVX began shipping a selection of multi-layer varistors (MLV) in 1988 and entered the automotive supply chain in 2001. AVX has adopted bismuth oxide (Bi2O3)-based construction for its high reliability and has resulted in zero defective parts per million quality record since 2008. In addition, these devices meet the strict automotive quality standards (AEC-Q200, for example) and as such, are an ideal choice for protecting automotive Ethernet circuits.

Figure 1: AVX Varistor History and Specifications

Depending on the specific requirements for size, capacitance, and energy protection, there are several different series of MLV devices to choose from. Three popular AVX lines are shown in figure 2.

Figure 2: AVX lines of multi-layer varistors

AVX also offers a specific lineup of MLV’s called “Antenna PowerGuard”, which provide ultra-low capacitance and tight tolerance for use in RF circuits, sensors, and high-speed data lines. This is achieved through their cascade structure (shown in figure 3), which maintains ESD resistance while reducing total overall capacitance. These devices are an ideal choice for protecting single-pair ethernet data lines in automotive applications.

Figure 3: AVX multi-layer varistors offer a cascade structure, which maintains ESD resistance while reducing total overall capacitance

A Competitive Comparison

To demonstrate the Advantage of Antenna PowerGuard varistors in automotive ethernet applications, an AVX device (VCAS04AP181R5KATWA) was tested next to a competitive product with similar electrical specifications. The I-V curve for the two devices is shown in figure 4, where it can be seen that the AVX device offers superior clamping voltage across the entire range tested. Similarly, in transient tests of 100 ns voltage pulses with 200 ps rise times, the AVX device consistently outperforms the competition with a lower clamping voltage.

Figure 4: The following I-V curve shows that the AVX device offers superior clamping voltage
Figure 5: The following I-V curve shows that the AVX varistor outperforms the competition with a lower clamping voltage

Transient energy testing with the 10X1000us pulse shows the ability of the AVX OPEN alliance varistor to suppress a high energy pulse. The AVX design provides higher protection to the circuit than the competitive varistor device.

Figure 6 shows the AVX varistor’s ability to suppress a transient with a higher applied current, 0.15A for AVX and 0.1A for the competitor without failing. Figure 7 shows the lower clamping voltage with higher transient energy suppressed between the AVX and competitor parts. The AVX device provides improved protection as it is capable to withstand higher energies while better suppressing the transient pulse in the circuit.

Figure 6: AVX varistor’s ability to suppress a transient with a higher applied current
Figure 7: AVX devices provide higher energy capability with lower clamping voltage for better transient suppression and circuit protection

PowerGuard Varistor Solutions

Automotive Ethernet has evolved into a very high-performance system that is tightly constrained, not only by the traditional goals of low cost and high reliability, but also by the regulatory standards for environmental resilience including ESD and EMI. Achieving these goals requires a broad range of techniques and supporting components, including varistors.

AVX offers a wide variety of varistors to support these designs and OPEN Alliance 1000BASE-T1 applications. In particular, AVX’s Antenna PowerGuard varistors are perfectly suited to protected automotive ethernet circuits, and as shown through a variety of tests, outperform the competition in every category.

Source: AVX Corporation

Related Posts

Capacitors

KYOCERA AVX Launches New Interactive Component Search Tool

27.6.2022
24
Capacitors

Murata to Begin Closed-loop Recycling of PET Film Used at MLCC Production

21.6.2022
57
Automotive

Coilcraft Introduces 40V Mini Power Inductors 

20.6.2022
25

Popular Posts

  • Understanding High-Precision Resistor Temperature Coefficient of Resistance

    0 shares
    Share 0 Tweet 0
  • Why Low ESR Matters in Capacitor Design

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • What is a Dielectric Constant of Plastic Materials ?

    4 shares
    Share 4 Tweet 0
  • Introduction to Capacitor Based Power Factor Correction Circuits

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Archive

2022
2021
2020
2019
2018
2017

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

© EPCI - Premium Passive Components Educational and Information Site

No Result
View All Result
  • Home
  • News
  • Video
  • Knowledge Blog
  • Preferred Suppliers
  • Events

© EPCI - Premium Passive Components Educational and Information Site

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.