​How to analyze the advantages and disadvantages of solid state capacitor? The dielectric of liquid electrolytic capacitor is liquid electrolyte. The liquid particles are very active at high temperature and produce pressure inside the capacitor. Its boiling point is not very high, so slurry explosion may occur. The solid capacitor adopts polymer dielectric, and the activity of solid particles at high temperature is lower than that of liquid electrolyte, Its boiling point is also as high as 350 degrees Celsius, so it is almost impossible to have the possibility of slurry explosion. Theoretically, it is almost impossible for solid-state capacitors to explode.

The equivalent series impedance of solid-state capacitor is better than that of traditional electrolytic capacitor. According to the test results, the equivalent series resistance of solid-state capacitor is very small in high frequency operation, and its conductivity frequency is very good. It has the characteristics of lower impedance and lower thermal output, which is obvious between 100kHz and 10MHz. However, the traditional electrolytic capacitor is easily affected by the temperature and humidity of the environment, and its high and low temperature stability is slightly poor.

The ESR (equivalent series resistance) impedance of solid-state capacitors can be as low as 0.004-0.005 ohm even at - 55 ℃ to 105 ℃, but the electrolytic capacitors will change with temperature. In terms of capacitance value, the liquid capacitance below 20 ℃ will be lower than the marked capacitance value. The lower the temperature is, the lower the capacitance value will be. At minus 20 ℃, the capacitance will drop by about 13%, and at minus 55 ℃, the electric capacity will reach 37%.

Of course, this has no impact on ordinary users, but for players who use liquid nitrogen as the ultimate overclocking, the solid-state capacitor can ensure that the capacitance will not be affected due to the decrease of temperature, thus greatly reducing the stability of overclocking, because the capacitance value of the solid-state capacitor at 55 degrees below zero will only decrease by less than 5%. Solid state capacitors do have many advantages, but they are not always applicable.

The low frequency response of solid-state capacitor is not as good as that of electrolytic capacitor. If it is used in the part related to sound effect, it will not get good sound quality. In other words, a motherboard using all solid-state capacitor is not necessarily reasonable! Whether it is solid-state capacitor or electrolytic capacitor, their main function is to filter out clutter, so as long as the capacity of the capacitor reaches a certain value requirements, as long as its component quality is qualified, it can also ensure the stable operation of the motherboard. And this, electrolytic capacitor also can do completely!

When the temperature of solid-state capacitor is 105 ℃, the life of solid-state capacitor and electrolytic capacitor is 2000 hours. When the temperature decreases, their life will increase. However, the life of solid-state capacitor increases more greatly. Generally, the working temperature of capacitor is 70 ℃ or lower. At this time, the life of solid-state capacitor may reach 23 years, almost 6 times that of electrolytic capacitor! But... Will your motherboard continue to use in 23 years? And this 23 years refers to 24-hour power on, even if the capacitor has such a long life, I'm afraid other components can't stand 23 years!

Compared with electrolytic capacitor, the capacity of electrolytic capacitor is much larger than that of solid capacitor under the same volume and voltage. At present, the CPU power supply of computer motherboard mostly adopts solid capacitor, which avoids the problem of slurry explosion, but due to the limitation of volume, there is little redundancy; Moreover, due to the capacity problem, we have to increase the switching frequency of the CPU power supply part.

Solid state capacitor and electrolytic capacitor will have capacity attenuation problem in the process of use, and the circuit board using solid state capacitor, the capacity of a little fluctuation, will make the power ripple, resulting in the CPU can not work normally. Therefore, in theory, the life of solid-state capacitor is very high, but the life of the board using solid-state capacitor is not necessarily high.