What is the large capacity of ceramic capacitors

Ceramic capacitors are capacitors whose dielectric material is ceramic. Depending on the ceramic material, they can be divided into two types: low-frequency ceramic capacitors and high-frequency ceramic capacitors. Classified by structure, it can be divided into wafer capacitors, tubular capacitors, rectangular capacitors, chip capacitors, through-capacitors and so on.

Capacitors are like water cups. The larger the cup, the more water it holds. The larger the capacitor size, the larger the capacity. The unit of capacitance is F, and the basic units are pF, nF, and uF. The amount of energy stored in the capacitor is "capacitance x voltage". This voltage refers to the withstand voltage, which is how many volts the capacitor can charge. Electricity is proportional to capacitance, proportional to voltage, and proportional to volume.

Generally, ceramic capacitors have a starting capacity of 0.5pF, and will vary according to the size and capacity of the ceramic plate. The commonly used 0402 capacitors are generally 10uF, and the 0805 capacitors are generally 47uF. The large capacity can reach 100UF. For example, a company in Japan has successfully developed a large-capacity ceramic capacitor with a capacitance of 100μF and a high withstand voltage of 25 V. This product can be used for power lines of liquid crystal displays.

Large capacitors cannot be selected blindly when choosing capacitors. It is correct to choose the right capacitors. For example, 0402 capacitors can achieve 10uF10V, and 0805 capacitors can achieve 47uF10V. However, for good procurement and low cost, capacitors are generally not selected. It is generally recommended to select 4.7uF for 0402, 10uF for 0603, and 22uF for 0805. Therefore, we must choose the appropriate capacitor in combination with our own circuit requirements, and do not blindly choose large-capacity capacitors.

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