T540D156K035AT8610

What are Tantalum-Polymer Capacitors?

Tantalum-polymer capacitors, also known as tantalum capacitors, are small electrolytic capacitors with a wide capacitance range, high capacitance density, and low equivalent series resistance (ESR). They are composed of tantalum metal, a tantalum oxide dielectric layer, and tantalum resin in a MLCC (Multilayer Ceramic Capacitor) package. The tantalum metal is chosen as an anode because of its excellent property as an electrostatic charge storage medium and its low electrical resistance. Its ability to store electrical energy is known as capacitance, which is measured in Farads (F).

T540D156K035AT8610 Application Field and Working Principle

The T540D156K035AT8610 is a type of tantalum-polymer capacitor specifically designed for power electronics applications. It is designed to be used as an output filter capacitor in a boost converter to improve efficiency and reduce EMI (electromagnetic interference). It is particularly suitable for applications that require high capacitance values and low ESR. The T540D156K035AT8610 features a capacitance of 154 μF/25V, an ESR value of 36.5 mΩ @ 100 kHz, and a low profile of 3.5 mm. It offers excellent high-temperature operation, thanks to its high dielectric strength, rated up to 105°C.

The working principle of this component is based on the concept of capacitance. When a voltage is applied to two conductors, a capacitor will store energy in the form of an electrostatic charge. The amount of charge stored is proportional to the applied voltage, and is independent of the frequency. As current passes through the capacitor, energy is stored in the form of a voltage drop, or a “capacitive reactance”. This reactance is inversely proportional to the frequency of the alternating current, and the capacitance of the capacitor. In the case of the T540D156K035AT8610, the capacitor is designed to store energy at a high frequency, and dissipate it by slowing down the flow of current. This can be used to reduce EMI and improve the efficiency of a buck-boost converter.

Conclusion

T540D156K035AT8610 is a type of tantalum-polymer capacitor that is specifically designed for power electronics applications. It features a capacitance of 154 μF/25V, an ESR value of 36.5 mΩ @ 100 kHz, and a low profile of 3.5 mm. Its working principle is based on the concept of capacitance, and it is capable of storing energy at high frequencies and dissipating it by slowing down the flow of current. This can be used to reduce EMI and improve the efficiency of boost converters.