The full name of solid capacitor is: solid aluminum electrolytic capacitor . The biggest difference between it and ordinary capacitors (i.e., liquid aluminum electrolytic capacitors) is that they use different dielectric materials. The dielectric material of liquid aluminum capacitors is electrolyte, while the dielectric material of solid capacitors is conductive polymer materials. So what are the main advantages of solid capacitors?
1. High stability
Solid aluminum electrolytic capacitors can continue to operate stably in high temperature environments, and the use of solid aluminum electrolytic capacitors can directly improve the performance of the motherboard. At the same time, due to its stable impedance over a wide temperature range, it is suitable for power supply filtering. It can effectively provide stable and abundant power, which is especially important during overclocking.
Solid capacitors can still operate normally in high temperature environments and maintain various electrical functions. Its capacitance does not change by more than 15% over the entire temperature range, which is significantly better than liquid electrolytic capacitors. At the same time, the capacitance of solid electrolytic capacitors has basically nothing to do with their operating voltage, thus ensuring their stable operation in voltage fluctuation environments.
2. Long life
Solid aluminum electrolytic capacitors have an extremely long service life (more than 50 years). Compared with liquid aluminum electrolytic capacitors, they can be regarded as "naturally protected". It will not be broken down, and there is no need to worry about the drying up and leakage of the liquid electrolyte affecting the stability of the motherboard. Because there are no problems with liquid electrolytes, solid aluminum electrolytic capacitors make motherboards more stable and reliable.
Solid electrolytes will not evaporate, expand, or even burn like liquid electrolytes in high-heat environments. Even if the temperature of the capacitor exceeds its endurance limit, the solid electrolyte simply melts, which will not cause the metal shell of the capacitor to burst, making it very safe.
The operating temperature directly affects the service life of electrolytic capacitors. The service lives of solid electrolytic capacitors and liquid electrolytic capacitors are significantly longer in different temperature environments.
3. Low ESR and high additional ripple current
ESR (EquivalentSeriesResistance) refers to the equivalent series resistance, which is a very important target for capacitors. The lower the ESR, the faster the capacitor charges and discharges. This function directly affects the decoupling function of the microprocessor power supply circuit. In high-frequency circuits, the advantages of the low ESR characteristics of solid electrolytic capacitors become more and more significant. It can be said that the low ESR characteristics at high frequencies are the watershed between the functional differences between solid electrolytic capacitors and liquid capacitors. Solid aluminum electrolytic capacitors have very low ESR and very small energy dissipation. Under high-temperature, high-frequency and high-power operating conditions, the extremely low ESR properties of solid capacitors can fully absorb the high-amplitude voltage generated between power lines in the circuit and prevent it from disturbing the system.
The power consumption of the current CPU is very high, the main frequency has far exceeded 1GHz, and the peak current of the CPU has reached 80A or more, and the output filter capacitor is close to the operating critical point. On the other hand, the CPU adopts multiple operating modes and spends most of its time in the conversion process of operating modes. When the CPU changes from a low power consumption state to a full load state, a large amount of energy required for this instantaneous (usually less than 5 milliseconds) switching of the CPU comes from the capacitor in the CPU power supply circuit. At this time, the high-speed charge and discharge function of the solid capacitor can be Instantly outputs high peak current to ensure sufficient power supply and ensure stable operation of the CPU.Chip capacitor
