In recent years, notebooks and smartphones have become the most mainstream electronic products in the world, and their output is huge and continues to grow rapidly. The output of their compatible power adapters and mobile phone chargers is even higher. Solid aluminum capacitors have been widely used in power adapters and mobile phone chargers. They are one of the must-have components of all high-end brands and have become a promotional point for these products. The reasons for using solid capacitors for power adapters and mobile phone chargers are as follows:

　　1. Applying a solid capacitor instead of the π-shaped filter circuit at the output of the original circuit (2pcs liquid aluminum capacitor + 1pcs inductor) can reduce the number of electronic components used, thus miniaturizing the circuit (as shown in Figure 3);

2. The solid-state capacitor has excellent noise reduction effect, which greatly reduces the output ripple voltage of the circuit, which can be as low as 30mV, which fully meets the requirements of ETSI EN 301 489-34;

3. Due to the high reliability and long life of solid capacitors, circuit safety and life are greatly improved;

4. Solid capacitors have excellent high and low temperature performance, which greatly expands the use environment of electronic products, such as working in a cold environment of minus 50 ° C or a high temperature environment of 105 ° C;

5. Due to the reduced number of components used, the circuit is greatly simplified, circuit reliability is improved, and manufacturing costs are reduced.

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