6TPE470M Capacitors

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The Application Field and Working Principle of Tantalum–Polymer Capacitors, 6TPE470M

Tantalum–Polymer capacitors are a type of capacitor which combines two distinct varieties of capacitors - tantalum and polymer. Tantalum capacitors consist of a tantalum anode and a dielectric material. In contrast, polymer capacitors use a conductive polymer to create their dielectric material. By combining the advantages of both types of capacitors, Tantalum–Polymer capacitors are capable of achieving higher capacitance in a smaller form factor while enjoying increased stability and reliability.

6TPE470M is a popular series of tantalum–polymer capacitors produced by KEMET and is designed to allow for a significant increase in capacitance density over conventional tantalum capacitors. This series of capacitors is capable of being both reflow and wave soldered, and is available in various capacitance values ranging from 2.4uF to 33uF.

Design and Construction

The basic components of a 6TPE470M capacitor are a conductive polymer, a tantalum anode, and a dielectric material. The conductive polymer is a proprietary blend of conductive polymers and binders which KEMET has developed for reliable operation in reflow and wave soldering applications. This material provides increased stability and reliability over standard designs.

The tantalum anode is a high-purity tantalum grain with a specially designed grain structure that provides increased efficiency under high temperature and high capacitance density conditions. The dielectric material is an ultra-thin film of self-healing dielectric which provides increased reliability under both normal operating conditions and extreme overloads.

Advantages and Performance

The combination of tantalum and polymer capacitors in the 6TPE470M series provides a number of advantages over traditional designs. The combination of proprietary materials used in this series provides increased stability and reliability while reducing losses due to ESR (equivalent series resistance). This increases the overall efficiency of the capacitor.

Furthermore, the use of the tantalum and polymer design allows for much higher capacitance values in a much smaller form factor. This makes the 6TPE470M series ideal for space-constrained applications.

The 6TPE470M series of capacitors operate with a wide range of temperature ratings (from -40°C to +125°C) with a range of voltage ratings ranging from 6.3V to 10V.

Applications

The 6TPE470M series of tantalum–polymer capacitors are well-suited for a variety of applications ranging from consumer electronics to aerospace and military applications. The compact form factor and high capacitance make them an ideal choice for applications requiring increased efficiency, stability, and reliability. Because of the low ESR, they are also well suited for applications requiring decreased power consumption or increased power density.

Common applications for the 6TPE470M series of capacitors include DC-DC converters, power supplies, motor drives, and power converters.

Conclusion

The 6TPE470M series of tantalum–polymer capacitors combine the best of both worlds - the high voltage and increased reliability of a tantalum capacitor, and the increased capacitance density of a polymer-based capacitor. The high capacitance values and low ESR ratings of this series make it an ideal choice for a variety of applications where space and power requirements are of the utmost importance.

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