What kind of chip capacitors are in the power supply?

What kind of chip capacitors are in the power supply? Pingshang Technology Editor will talk to you.

1. Metal film capacitors A metallized film capacitor refers to a capacitor formed by rolling or stacking a double-sided metallized polypropylene film and a non-metallized polypropylene film. No polarity, high insulation resistance, excellent frequency characteristics (wide frequency response), and low dielectric loss. Based on the above advantages, film capacitors are widely used in analog circuits. Especially in the signal cross-connection part, capacitors with good frequency characteristics and extremely low dielectric loss must be used to ensure that the signal will not be too distorted when it is transmitted.

2. Aluminum electrolytic capacitor The aluminum electrolytic capacitor is made of an aluminum cylinder as the negative electrode, which is filled with liquid electrolyte, and is made by inserting a curved aluminum strip as the positive electrode. It also needs to undergo DC voltage treatment to form an oxide film on the positive electrode as a medium. It is characterized by large capacity, but large leakage, poor stability, positive and negative polarity, suitable for power supply filtering or low-frequency circuits. When using, do not connect the positive and negative poles reversely.

3. Solid capacitor The full name is: solid aluminum electrolytic capacitors. The big difference between it and ordinary capacitors (ie liquid aluminum electrolytic capacitors) lies in the use of different dielectric materials. The dielectric material of liquid aluminum capacitors is electrolyte, while the dielectric material of solid capacitors is conductive polymer material. So a good motherboard will say that it uses all solid capacitors, and solid capacitors are indeed better than electrolytic capacitors in terms of materials and technology.

4. Ceramic capacitors Ceramic capacitor refers to the use of high dielectric constant capacitor ceramic barium titanate titanium monoxide extruded into a tube, wafer or disc as the medium, and silver is plated on the ceramic as an electrode by the sintering method. It is divided into high-frequency porcelain and low-frequency porcelain. The capacity is small, the price is cheap, and most of them are used for filtering.

5.MLCC chip capacitors It is a multilayer chip ceramic capacitor with small size and powerful functions. It is used for bypassing, decoupling, filtering and energy storage. It is widely used in control circuits with low voltage requirements. It is also a must-have for many veneer designers to travel at home.

That’s all for sharing. Friends who need to purchase chip capacitors are welcome to come and understand, our company has a wide range of products and complete specifications!