Blog

  • Isolated RS-485 interface based on 4-channel digital isolator with integrated DC/DC converter

    Isolated RS-485 interface based on 4-channel digital isolator with integrated DC/DC converter

    nwieland
    This design example shows an isolated RS-485 interface using a 4-channel reinforced digital isolator with an integrated DC/DC converter, reducing component count and board space. The design is optimized for half-duplex operation at data rates up to 10 Mbps and meets CISPR 32 Class B radiated emission standard.
  • Taking A Closer Look at Mechanical Components and Cleaning Processes

    Taking A Closer Look at Mechanical Components and Cleaning Processes

    nwieland
    Over the years, we have frequently received questions regarding the washing process of mechanical switches. We have observed that washing has become a standard part of the production process for customers. Washing the PCB helps remove residues on the PCB to avoid corrosion, short circuit or maybe the customer has afterward another coating or potting processes. And in the market, we also see different definitions like…
  • REDFIT SKEDD Crimp Connector #PLUGTHEPOWER

    REDFIT SKEDD Crimp Connector #PLUGTHEPOWER

    nwieland
    SKEDD is a technology developed by Würth Elektronik that allows connectors to contact directly with the printed circuit board without soldering. The combination with the crimp technology of the REDFIT Crimp SKEDD Connector offers significant advantages over soldered connectors.
  • SN024 | Transient suppression at different interfaces

    SN024 | Transient suppression at different interfaces

    nwieland
    Due to the increasing number of electronic devices on the public power grid and network communication via data lines, measures to prevent mutual interference caused by electromagnetic interference are becoming increasingly important. Protecting the wired interfaces against transient overvoltage is particularly important.
  • Free hands on training on Cybersecurity

    Free hands on training on Cybersecurity

    nwieland
    Take advantage of the hands-on training with the Cordelia-I EV-Kit on GitHub! This free guide teaches you how to establish a secure wireless connection and implement protocols like MQTT and TLS. Experiment with the EV-Kit and gain practical experience in IoT cybersecurity.
  • ANP146 | Theoretical Insights and Practical Applications of the WE-CMDC Series Common Mode Chokes

    ANP146 | Theoretical Insights and Practical Applications of the WE-CMDC Series Common Mode Chokes

    nwieland
    Common mode chokes (CMCs) are widely used to filter out interference components in electronic circuits. These components specifically target noise signals that appear on line pairs with the same amplitude and phase relative to the reference ground. Accurately modeling the behavior of CMCs is crucial for understanding the component in detail. Furthermore, the transfer of the model and its functional simulation into practice…
  • ANS018 | EMI Filter Design for Non-Isolated DC/DC Converters

    ANS018 | EMI Filter Design for Non-Isolated DC/DC Converters

    nwieland
    Today, many industrial applications run with input voltage levels such as 5VDC or lower, as shown in Figure 1. The power distribution system used to power such applications is often a DC bus voltage of 24VDC. DC/DC power modules are commonly chosen to handle the conversion of the higher DC bus voltage down to the lower voltage level.
  • REDCUBE PRESS- FIT Terminals for automotive applications

    REDCUBE PRESS- FIT Terminals for automotive applications

    nwieland
    REDCUBE PRESS-FIT terminals stand out as the go-to choice for robust high-power connections at the PCB level in automotive applications. They're widely employed for connecting wiring with cable lugs to circuit boards. The current rating of REDCUBE PRESS-FIT is seriously impressive. Even with the same power output, these components generate the least amount of heat compared to alternatives for powering PCBs.
  • ANS023 | Transient protection SIP-3

    ANS023 | Transient protection SIP-3

    nwieland
    Transient over voltages often occur in industrial environments due to an extensive electrical infrastructure. In order to develop an efficient filter to limit transient over voltages, many influencing parameters must be considered. Today, many industrial applications run on logic input voltage levels such as 5 VDC or lower, as shown in Figure 1. The power distribution system used to power such applications often run on…
  • ANP143 | TVS diodes: basics, function and their applications

    ANP143 | TVS diodes: basics, function and their applications

    nwieland
    TVS diodes (transient voltage suppressors) are used to protect circuits from high voltage spikes. They are designed to operate in reverse bias and work by discharging interference current when the reverse voltage exceeds the ‘avalanche breakdown potential’. They are essentially high-power Zener diodes and represent a special form of avalanche diodes. TVS diodes can withstand large power spikes (hundreds or thousands of…
  • ANP118 | Acoustic noise & Coil whine effect

    ANP118 | Acoustic noise & Coil whine effect

    nwieland
    The ability to hear is one of the most important aspects of life. In industry, sounds are often used specifically to evoke a response. In some cases, however, hearing sounds is not desired and can even be a disruptive factor. In the field of electronics, sounds from electronic components are undesirable unless they have been installed for that specific purpose. This application note explains how a noise can be perceived…
  • ANP135 | The SEPIC with coupled and uncoupled inductors

    ANP135 | The SEPIC with coupled and uncoupled inductors

    nwieland
    The Single-Ended-Primary-Inductor-Converter, popularly known as SEPIC, is a non-isolated, switching power supply topology generating an output voltage that can be higher or lower than the input voltage. This is a common requirement in battery-powered applications as well as those with fluctuating input and/or output voltages, like photovoltaic converters (PV), automotive electronics, offline LED lighting and battery chargers…
  • Plastic Melting and Flammability: Is there any relationship?

    Plastic Melting and Flammability: Is there any relationship?

    nwieland
    We often receive questions from customers, such as, why during the customer reflow process, e.g. 245°C, a SMD component will be melting, even though the component supplier’s datasheet shows a flammability grade withstanding 245°C or above.
  • ANS022 | Bridge capacitor for isolated power modules, the whole truth, no myths

    ANS022 | Bridge capacitor for isolated power modules, the whole truth, no myths

    nwieland
    Deciding which type of common mode EMC filter to choose when designing an isolated DC/DC converter or a power module to pass the EMC test still often leads to less-than-optimal solutions. Knowledge about common mode interference and its minimisation is characterised by myths. ‘Common mode interference is quite difficult to understand’ is the first argument put forward. Followed by ‘common mode interference is more of…
  • ANP142 | Effects of molded power inductor degradationndue to higher voltage or temperature in a DC/DC converter

    ANP142 | Effects of molded power inductor degradationndue to higher voltage or temperature in a DC/DC converter

    nwieland
    For DC-DC converter applications molded power inductors enable both smaller footprints and lower profile due to the properties of the magnetic material. The reduced dimensions of current designs demand the employment of smaller inductors capable of operating at elevated voltages and currents in more extreme thermal conditions. The higher electrical and thermal stresses can lead to an increase in magnetic core loss over…
  • Its´s a match - The Difference of a matched vs. unmatched antenna

    Its´s a match - The Difference of a matched vs. unmatched antenna

    nwieland
    As a manufacturer of chip antennas, we as Würth Elektronik eiSos want to show our customers, how their antennas work. So we asked ourselves the question: how can we visualize antenna performance? Like many electrical parameters, electromagnetic waves are invisible to the human eye. The goal of this project was to create an application, that we could bring to customer seminars to show antenna performance in an easy way…
  • ANS021 | Ensuring Safety without Compromising Data Integrity: Critical Characteristics of Digital Isolators

    ANS021 | Ensuring Safety without Compromising Data Integrity: Critical Characteristics of Digital Isolators

    nwieland
    In today's rapidly evolving technology landscape, the demand for digital isolators has grown rapidly, driven by the increasing need for safety, isolation and high data rates in modern electronic systems. Digital isolators, which are critical components in many applications, perform the essential function of electrically isolating circuits while ensuring the smooth transfer of data between different parts of the system…
  • ANE022 | Coaxial Connectors Electrical Performance Indicators

    ANE022 | Coaxial Connectors Electrical Performance Indicators

    nwieland
    RF connectors are essential components in a variety of electronic devices and communication systems. They are designed to transmit high-frequency signals, such as radio frequency (RF) and microwave signals, with minimal signal loss and high reliability. The coaxial structure, consisting of an inner conductor, insulation layer, and outer conductor, effectively prevents electromagnetic interference and signal degradation…
  • ANP138 | Custom Rated Current Calculator

    ANP138 | Custom Rated Current Calculator

    nwieland
    The definition of rated current continues to vary between passive component manufacturers in the power electronics industry, despite the adoption of IEC standard 62024-2 which specifically describes how rated current should be measured. Because of this, misconceptions can still arise about what this parameter actually represents and how design engineers can use it. Is it an absolute parameter? Are rated current values…
  • ANS020 | Digital isolators

    ANS020 | Digital isolators

    nwieland
    The electrotechnical infrastructure has become very complex in recent years, whether in the industrial environment or in building technology. The decentralized recording of physical parameters is "state of the art" and high-performance microcontrollers facilitate the processing of data. However, recording the data from the object is often a challenge and wireless transmission of the data is frequently not possible. The…
  • ANP141 | The SPoE Interface from an EMC Perspective

    ANP141 | The SPoE Interface from an EMC Perspective

    nwieland
    There are many possible applications for the 10 Mbit/s SPE interface with integrated power transmission, such as operating sensors over larger distances. This Application Note analyzes the EMC performance of the reference design RD041.
  • RD041 | Design of a Single Pair Ethernet System with Power over Data Lines (SPoE)

    RD041 | Design of a Single Pair Ethernet System with Power over Data Lines (SPoE)

    nwieland
    Single Pair Ethernet is becoming increasingly popular in industrial networking due to the simplified cabling with just one twisted pair of wires. If power is also supplied via this, the SPE transmission standard with Power over Data Lines is unbeatable simple, but the implementation not trivial.
  • Zero touch security Internet of Things connectivity

    Zero touch security Internet of Things connectivity

    nwieland
    QuarkLink is a software-based IoT security platform from Crypto Quantique that securely connects IoT devices to server-hosted apps on-premises or in the cloud. QuarkLink uses advanced cryptography techniques to integrate with any root-of-trust for end-to-end security across every IoT device.
  • Electronics for good – mushroom farming in Cambodia using WE technology

    Electronics for good – mushroom farming in Cambodia using WE technology

    nwieland
    Mushroom cultivation has had a long history in Southeast Asian countries, providing essential nutrients for people. However, the problem of traditional mushroom cultivation is high manual work for the Cambodian farmers. With current simple methods of temperature and humidity regulations, the yield depends on the seasonality of rainy, dry and hot season. Most potential to increase their income is to ensure good harvest…
  • Internet of Things

    Internet of Things

    nwieland
    A secure root of trust is a unique identity and a cryptographic key associated with it. Since the entire chain of security relies on this root of trust, it is essential to have a RoT that is unique, immutable and unclonable.