Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Researchers Enhanced 2D Ferromagnets Performance

    Bourns Releases Two High Current Common Mode Choke Models

    Electronics Weekly Announcing Finalists for Elektra Awards 2025

    Exxelia Exhibit at Electronica India September 17–19, 2025

    Würth Elektronik Announces 2025 Digital WE Days Virtual Conference

    VINATech Unveils Hybrid Energy Storage System to Revolutionize Grid Stability and Power Delivery

    SCHURTER Releases High Performance EV-Fuse

    Panasonic Industry to Double Production of MEGTRON PCB Materials

    5th PCNS Awards Outstanding Passive Component Papers

    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
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

    How to Calculate the Output Capacitor for a Switching Power Supply

    Switched Capacitor Converter Explained

    Understanding Inductor Dot Markings and Their Application in LTspice

    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
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Researchers Enhanced 2D Ferromagnets Performance

    Bourns Releases Two High Current Common Mode Choke Models

    Electronics Weekly Announcing Finalists for Elektra Awards 2025

    Exxelia Exhibit at Electronica India September 17–19, 2025

    Würth Elektronik Announces 2025 Digital WE Days Virtual Conference

    VINATech Unveils Hybrid Energy Storage System to Revolutionize Grid Stability and Power Delivery

    SCHURTER Releases High Performance EV-Fuse

    Panasonic Industry to Double Production of MEGTRON PCB Materials

    5th PCNS Awards Outstanding Passive Component Papers

    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
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

    How to Calculate the Output Capacitor for a Switching Power Supply

    Switched Capacitor Converter Explained

    Understanding Inductor Dot Markings and Their Application in LTspice

    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
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

TDK Introduces Special Film Capacitor Dielectric for SiC and GaN DC Link Operating up to 125C

1.6.2022
Reading Time: 4 mins read
A A

Power transistors based on gallium nitride and silicon carbide impose very high demands on DC link capacitors. TDK has now developed a dielectric that allows such film capacitors to be used up to +125 °C instead of +105 °C while optimizing their winding structure.

In power electronic applications, wide bandgap (WBG) semiconductor switches based on gallium nitride (GaN) and silicon carbide (SiC) offer a great advantage, as they can be operated with switching frequencies in the range of hundreds of kilohertz. At the same time, they feature steep pulse edges, thereby achieving greater energy efficiency. Due to these high switching frequencies, film capacitors are increasingly being used as DC link capacitors.

RelatedPosts

Researchers Enhanced 2D Ferromagnets Performance

Bourns Releases Two High Current Common Mode Choke Models

Electronics Weekly Announcing Finalists for Elektra Awards 2025

In order to minimize the lead lengths, and thus the parasitic inductances, the capacitors are connected directly to the WBG modules by means of busbars. The problem here is that WBG semiconductors are operated with high barrier termination temperatures, which can also be conducted via the busbars to the DC link capacitors. The temperature limit of conventional film capacitors with a dielectric of biaxially oriented polypropylene (BOPP), however, is only +105 °C.

Bild 1: Bei dem neuen Material COC-PP erfolgt bis zu einer Temperatur von +130 °C keine Schrumpfung in transversaler Richtung (links). Auch das Spannungs-Derating des neuen Materials ist deutlich besser (rechts).
Figure 1: At temperatures of up to +130 °C the new COC-PP material exhibits no shrinkage in a transverse direction (left). Voltage derating of the new material is also significantly better (right). © TDK

A Blend of Two Dielectrics

TDK has developed a dielectric that can also be used continuously at high temperatures. This involves a combination of two basic materials. One component is semi-crystalline polypropylene, which is ideal for processing into films; the other is amorphous cyclic olefin copolymer (COC), which can tolerate high temperatures. The resulting dielectric (COC-PP) can be used at temperatures in excess of +125 °C with considerably lower derating, while retaining the good self-healing properties of BOPP. In addition, this enables extremely thin films of just 3 µm to be manufactured. Figure 1 shows the significantly improved shrinking and derating behavior of COC-PP in comparison with conventional BOPP.

Like all capacitors, film capacitors also feature a complex Impedance, a series connection comprising an ohmic and a capacitive part. Accordingly, this produces a frequency-dependent resistance that increases sharply as the frequencies rise. This rise is essentially caused by inhomogeneous impedances, skin effects and winding geometries, leading to unwanted resonances and electromagnetic effects. The result is a heating of the capacitor.

Bild 2: Bei einer Frequenz von 5 kHz verteilen sich die Ströme und damit die Verluste in den beiden Wickeln eines Standard-Filmkondensators sehr unterschiedlich.
Figure 2: A frequency of 5 kHz produces a significant inhomogeneous distribution of current, and therefore losses, over both windings. © TDK

This has a particularly negative effect if the internal design of a capacitor consists of several windings. Different internal lead lengths and other factors then lead to a pronounced frequency-dependent current distribution across the individual windings, as shown in Figure 2.

By using CAD and FEA (finite element analysis) simulation software TDK has developed high-frequency power capacitors with an optimized internal design. Even at the high frequencies and temperatures at which wide-bandgap semiconductors are operated, these capacitors offer high performance with low losses, thanks to a minimized ESR (Figure 3).

Bild 3: Bei den neuen HF-Leistungskondensatoren sinkt die Verlustleistung im Vergleich zu konventionellen Kondensatoren drastisch.
Figure 3: At high frequencies the new HF power capacitors exhibit a dramatic reduction in power losses in comparison with conventional capacitors. © TDK

The new B25640* series of HF power capacitors is especially tailor-made for SiC semiconductors. With rated DC voltages of between 700 V and 2200 V and capacitance values from 370 µF to 2300 µF, the capacitors are suitable for the new generation of converters for traction, industrial drives and renewable energy applications. With the COCPP dielectric the capacitors can also be operated without voltage derating at temperatures of up to +125 °C. One great advantage of the new capacitors is their low ESL value of 10 nH. This means that, even at high, rapidly switched currents, their voltage overshoot remains very low, so that in most cases they even make snubber capacitors unnecessary.

Related

Source: TDK

Recent Posts

Bourns Releases Two High Current Common Mode Choke Models

16.9.2025
1

Electronics Weekly Announcing Finalists for Elektra Awards 2025

16.9.2025
2

Exxelia Exhibit at Electronica India September 17–19, 2025

15.9.2025
19

Würth Elektronik Announces 2025 Digital WE Days Virtual Conference

15.9.2025
9

VINATech Unveils Hybrid Energy Storage System to Revolutionize Grid Stability and Power Delivery

15.9.2025
7

SCHURTER Releases High Performance EV-Fuse

15.9.2025
4

5th PCNS Awards Outstanding Passive Component Papers

14.9.2025
27

TDK Releases Ultra-small PFC Capacitors

10.9.2025
31

KYOCERA AVX Releases Novel Mini BME Stacked Ceramic Capacitors

10.9.2025
25

Vishay Releases Class 1 Leaded High Voltage Ceramic Disc Capacitors

10.9.2025
17

Upcoming Events

Sep 16
17:00 - 18:00 CEST

EMI Shielding Challenges

Sep 16
20:00 - 21:00 CEST

Reduce SMT Parasitic Design Failures with Innovative Filter Topologies

Sep 22
September 22 @ 13:00 - September 25 @ 15:15 EDT

Pre Cap Visual Inspection per Mil-Std-883 (TM 2017)

Sep 30
September 30 @ 12:00 - October 2 @ 14:00 EDT

MIL-Std-883 TM 2010

Oct 17
12:00 - 14:00 EDT

External Visual Inspection per MIL-STD-883 TM 2009

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    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 and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • How to Design an Inductor

    0 shares
    Share 0 Tweet 0
  • Core Materials, Permeability and Their Losses

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

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

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

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