Introduction of general electrical properties and parameters of chip capacitors(II)

1. The relationship between capacitance and temperature

Temperature is an important factor that affects the capacitance. We call the relationship between capacitance and temperature as the temperature characteristics of capacitors. Generally speaking, for the more stable type I capacitors, the effect is relatively small and has little change, so we use PPM/ ℃ to express its capacity change rate, and for the type Ⅱ capacitors, the effect is relatively large. So we use "%" to express its capacity change rate.

2. The relationship between capacitance and DC voltage

In the practical application of the circuit, a DC voltage may be added at the two ends of the capacitor. We call the characteristic of the capacitor in this case the DC bias characteristic. At present, the material with good DC bias is BX. This material is obtained by modifying the X7R material. In addition, better bias characteristics of capacitors can be obtained by increasing the dielectric thickness.