As electronic devices become faster and operate at higher frequencies, capacitors used for noise filtering and decoupling applications require even lower ESL (Equivalent Series Inductance) characteristics.
Additionally, in automotive electrical systems, there is an increasing demand for low-ESL type products to improve safety and comfort and to meet the demands of infotainment.
This Solution Guide introduces various solutions utilizing TDK's advanced low-ESL components, the "YFF Series" 3-terminal feed-through filter.

TDK's NTCRP series (NTC thermistors) are used in a wide range of applications, including electric vehicle drive motors, batteries, and industrial equipment temperature detection, which require high reliability. This article explains thermal response, a very important characteristic of NTC thermistors, and introduces the method of measuring the response of the NTCRP series.

In resonant circuits used for wireless chargers and DC-DC converters, film capacitors have traditionally been used. However, advancements in the capacity expansion and high voltage resistance of Multilayer Ceramic Capacitors (MLCCs) have made it possible to replace film capacitors with MLCCs in these applications. Switching from film capacitors to MLCCs offers benefits such as miniaturization and reduced losses.

TDK Meister is an application software for Windows®, that can search TDK electronic components and display graphs for their characteristics. Using TDK Meister, you can easily select TDK electronic components that are optimum for electronic circuit design and EMC counter measure. In this article, overview and major functions of TDK Meister are introduced.

The formal name of Windows(R) is Microsoft(R) Windows(R) Operating System.<br>Microsoft(R) and Windows(R) are registered trademarks of Microsoft Corporation in the United States and/or other countries.

NFC stands for Near Field Communication, a type of short-range wireless communication.
Devices equipped with NFC can perform data transmission and authentication simply by being brought close to each other. This feature is rapidly being integrated into smartphones in recent times.
Additionally, its implementation is expanding to peripheral devices like wearable devices such as smartwatches.
NFC is widely used in cashless payment transactions and for connecting and authenticating peripheral devices. It holds the potential for diverse applications in realizing a touchless society.
This article introduces the main components used in NFC circuits, including NFC antennas, magnetic sheets, inductors for LC filters, and baluns for single-ended circuits.

TDK's NTCRP series (NTC thermistors) are used in a wide range of applications, including drive motors and batteries for electric vehicles and temperature sensing for industrial equipment. These products are designed to meet stringent reliability requirements.
Insulation resistance and dielectric withstand voltage are particularly crucial parameters for ensuring both safety and reliability during end-user operation.
This article aims to explain the test methods for evaluating the insulation resistance and dielectric withstand voltage of the NTCRP series.

In recent years, switching speed of DC-DC converters has increased as the switching frequency has become higher. As a result, high-frequency noise is generated when inductance and stray capacitance of the wiring of board or inside IC resonate due to a sudden change in input current. The high-frequency noise can conduct to external circuits and cause abnormal operation of the set. This Solution Guide introduces examples of noise countermeasures using a three-terminal filter (feed-through filter for power lines) with low ESL, which is effective for noise countermeasures against noise generated on the input side of DC-DC converters.

Traditionally, aluminum electrolytic capacitors and tantalum electrolytic capacitors have been widely used for smoothing and decoupling applications that require large capacitance. With increasing capacitance values, MLCCs are replacing various electrolytic capacitors in power circuits and other applications.
Replacing electrolytic capacitors with MLCCs offers various benefits such as space reduction due to smaller size and lower profile, reduced ripple voltage due to low ESR, and improved reliability due to reduced self-heating.
On the other hand, low ESR, which is an advantage of MLCCs, can sometimes lead to abnormal oscillation or anti-resonance. Additionally, high dielectric constant MLCCs (Class 2) exhibit a characteristic capacitance change when DC voltage is applied, so caution is necessary.
This guide explains the advantages and precautions to be taken when replacing electrolytic capacitors with MLCCs.

One of the well-established key requirements in solar inverters is their high efficiency. But also, their costs, size and weight are subject to continuous improvements. One approach to better fulfil all these demanding requirements simultaneously is the use of multilevel topologies.
The main advantages of switching between multiple voltage levels are lower voltage stress for the semiconductors and lower ripple stress for the power chokes.
This means that lower-voltage semiconductors can be used, which are typically cheaper.
Lower ripple stress for the chokes makes smaller and thereby lighter and cheaper choke designs possible.
The flying capacitor topology is a multilevel topology, that is an interesting choice especially for (but not limited to) the booster stage of a solar inverter. As its name implies, it needs a capacitor as a key element. This article describes and compares possible TDK solutions therefor.

In the automotive field, CPUs and FPGAs for systems that require advanced image processing, such as onboard ADAS ECUs and autonomous ECUs, need to operate at high speed and require high drive current in conjunction with the increasing performance and functionality of systems. Also, in the ICT field, power supply configurations that support higher current required for devices that need huge amounts of power such as servers. There is a trend towards higher operating speeds and higher currents in the power supply lines of systems with increased performance and functions as described above. At the same time, power supply structures that maintain the nominal voltage within narrow tolerance ranges, which have decreased in conjunction with processor miniaturization, are also required.