High Quality Power Adapter Needs To Understand These Points

Capacitor is a very common components in 12v 24v 48v switching power supply. It can be used to reduce ripple noise and improve the stability of power supply and transient response. However, there are many types of capacitors. How to make quick selection through skills, but the product has high reliability and stable performance?

In the design of power supply 12v 24v 48v, the most commonly used capacitors are ceramic capacitors, electrolytic capacitors, and tantalum capacitors. Understand their characteristic differences for quick selection.

1.The ceramic capacitor has small capacitance value, good high-frequency data characteristics, relatively wide range of temperature variation in the working environment, and ESR is smaller and smaller than electrolytic capacitor, without any characteristics;

2.The capacitance value of electrolytic capacitor can be large, but the operating temperature range is narrow, the electron spin resonance is large, and it has polarity.

3.Tantalum capacitors have the smallest ESR, larger capacitance than traditional ceramics and capacitors, polarity, poor safety performance, and are easy to cause fire.

Understand the characteristics of the above three capacitors, and you can use them easily.

At the same time, we should also consider the use of transformers.The saturation of the transformer core is caused by the large current flowing through the circuit and switch tube, which causes the loss to increase. Therefore, to avoid saturation, there must be enough air gap of the core, which requires a reasonable design of the number of turns and inductance. The leakage inductance of the transformer is too large, because the energy of the transformer cannot be completely transferred from the primary to the secondary. The leakage inductance will certainly occur during the production of the transformer. The greater the leakage inductance, the greater the loss. Therefore, reducing the leakage inductance of the transformer is also an effective way to improve the power quality.