T540D477M2R5CH8705

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Tantalum - Polymer Capacitors: T540D477M2R5CH8705 application field and working principle

Tantalum - polymer capacitors are a type of capacitors made from crystalline tantalum dioxide and polymer electrolyte. The tantalum dioxide is used as the conducting surface of the capacitor and the polymer electrolyte serves as the medium for the capacitors. The capacitance of a tantalum - polymer capacitor is determined by the amount of tantalum dioxide and the amount of electrolyte that is used. The higher the amount of tantalum dioxide and electrolyte, the higher the capacitance of the capacitor.

T540D477M2R5CH8705 Application Field

T540D477M2R5CH8705 is a Tantalum - Polymer Capacitor designed specifically to provide solutions to high voltage and large current requirements. It has an operating voltage of 5V and a maximum working voltage of 5.5V. Its dimensions are 5.4mm × 4.77mm × 2.5mm and its capacitance ranges from 0.1µF to 47µF. It is best suited for applications in the automotive industry and for power electronics such as charge pumps, DC-DC converters, motor drives, and solenoids. Its applications also include cell phones, portable media players, tablet PCs, PDAs, and Bluetooth modules. It can also be used in wireless charging applications and wireless energy transfer.

Working Principle

Tantalum - polymer capacitors work on the principle of dielectric polarization. Whenever a voltage is applied across the two electrodes of the capacitor, an electric field is formed which causes ions from the liquid electrolyte to be drawn towards the cathode and form an insulating layer. This insulating layer acts as a dielectric material and hence increases the capacitance of the capacitor. The amount of capacitance is determined by the amount of electrolyte between the two plates and the area of the two plates. The more the area and the more the amount of electrolyte, the more will be the capacitance of the capacitor.

When a voltage is applied across the two electrodes, the electric field induces a current, known as the leakage current, and this current flows through the electrolyte and through the dielectric material. This current is known as a direct current and it helps to maintain the stability of the capacitor. Thus, the stability of a capacitor is determined by the amount of leakage current passing through it.

The temperature of the capacitor also affects its capacitance. As the temperature increases, the number of ions in the liquid electrolyte increases and the permittivity of the dielectric material decreases due to increased viscosity. This leads to a decrease in the capacitance of the capacitor. Hence, temperature change can affect the performance of the capacitor.

Conclusion

The T540D477M2R5CH8705 is a type of Tantalum - Polymer capacitor which is specially designed for high voltage and large current applications. The capacitance of the capacitor is determined by the amount of tantalum dioxide and electrolyte between the two electrodes. It has an operating voltage of 5V and a maximum working voltage of 5.5V. Its capacitance ranges from 0.1µF to 47µF. The stability of the capacitor is determined by the amount of leakage current that passes through it, and the temperature of the capacitor affects its capacitance.

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