GDTs are circuit-board-compatible overvoltage-protection devices and are far removed from the “spark gap” of monster movies. Circuit protection is like insurance: you really don’t need it until you unexpectedly do, and then you’re very glad you have it. This protection falls into two broad categories: protection against overcurrent (the common thermal fuse is the first […]
FAQ
What are the current sensing challenges with WBG power converters?
The high-frequency switching of WBGs presents challenges related to bandwidth and speed that can be addressed with new sensing techniques. In addition, gallium nitride (GaN) and silicon carbide (SiC) devices have different tolerances to short circuit conditions and requirements for current sensing. Current sensors with the bandwidth needed to capture ultra-fast short-circuit events can be […]
What is a power quality survey used for?
Power quality (PQ) surveys are used in data centers, hospitals, and industrial installations to improve uptime and equipment performance by identifying the root causes of power quality problems. When discussing PQ problems, three important considerations are the types of PQ problems, the sources of PQ problems, and the tools for identifying and measuring PQ problems. […]
What are bidirectional GaN power ICs good for?
Bidirectional GaN power ICs are designed for various applications, from motor drives and renewable energy inverters to USB chargers, portable electronics, E-bikes, and more. This article presents examples of the application possibilities with bidirectional GaN switches. GaN high electron mobility transistors, HEMTs, or HFETs, have been fabricated using a 600 V process that produces devices […]
How to overcome the test and measurement challenges with WBG devices
The use of wide bandgap (WBG) semiconductors like SiC and GaN to improve data center, renewable energy, and EV powertrain efficiencies and speed up EV charging times, requiring that designers use new validation testing approaches to better understand device and system performance. This article begins by reviewing standard double-pulse testing (DPT) of WBGs. It then […]
What are some design considerations for titanium ac/dc power supplies?
With the development of Energy Star Titanium efficiency power supplies, the power electronics industry has met the challenges of reducing data center energy consumption and supporting a greener society. What were those challenges, and is there a path to “more than Titanium” power supplies? High-efficiency power factor correction (PFC) and high-efficiency dc-dc conversion were key […]
How to choose a voltage transducer
by NK Technologies Choosing the right voltage transducer (also called a voltage sensor) for your application can be daunting since it comes in many configurations. This guide will help you make the right choice. Each application will have unique requirements. To choose the correct voltage transducer, gather the following key criteria, shown in the table […]
What are the derating and other design considerations when using bimetallic thermal control devices?
Several design factors relate to specifying and using bimetallic thermal control devices and how they are used in systems. The metals and structure of the bimetallic element are of first importance. The selection of those metals impacts the device’s sensitivity and other performance parameters. Derating is especially important for conductive-type devices. The coefficients of linear […]
What’s the difference between cantilever and disk bimetallic thermal control devices?
The physical structure of the bimetallic element that provides thermal control is the difference between cantilever and disk bimetallic thermal control devices. This article begins by reviewing how bimetallic structures are made and operated. It then looks at how they are implemented in cantilever and disk thermal control devices. Two dissimilar metals are joined together […]
What are the primary applications for bimetallic thermal control devices?
Bimetallic thermal control devices are used primarily for temperature control, over-temperature protection, temperature sensing, and thermal fusing. They are also available in an equally wide range of package styles and are used in a wide range of industries, from consumer to industrial and military/aerospace. Some carry the full load current, while others are designed to […]
