Insufficient capacity of monolithic ceramic capacitor

Monolithic ceramic capacitor is abbreviated as MLCC. It is widely used in electronic precision instruments, and various small electronic devices for resonance, coupling, filtering and bypass.

The monolithic ceramic capacitor has good temperature and frequency characteristics. As the frequency rises, the capacitance shows a decreasing law, the decrease is relatively small, and the capacity is relatively stable, so it is widely used by everyone. Some people say that on the computer power supply, the purple wire 5V is used in the front stage. The voltage of the purple wire that appears after the voltage is unstable due to the high voltage line hitting the wire is as high as 20V. After inspection, it is found that the capacity of the monolithic ceramic capacitor is not enough. what's the situation?

If the capacitance of the power supply part is insufficient, the voltage of the latter stage will be unstable. You can use the oscilloscope to look at the waveform of the 5V voltage, or change the capacitor of a large capacity. The capacitance of the power supply part has a large capacity. When choosing the capacity of monolithic ceramic capacitor, you should consider the actual situation. If you don't understand, you can find a technician to find help.

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