Both ceramic and film capacitors are widely used in high voltage applications. Ceramic high voltage capacitors have the following advantages, as compared to film:
- Lower equivalent series inductance (ESL) and equivalent series resistance (ESR)
- Smaller size for the same value (capacitance & voltage)
- Better temperature coefficient available, as well as a choice of temperature coefficient characteristics
Disadvantages of ceramic capacitors include:
- Higher voltage coefficient, resulting in substantially lower capacitance as the applied voltage is increased. (This characteristic is often overlooked, and its effects are often more severe than you would think.)
- Lower maximum available capacitance rating
- Lower maximum available voltage rating
- Susceptibility to piezoelectric effects
- Typically smaller lead-to-lead distance
No comments:
Post a Comment
Note: Only a member of this blog may post a comment.