Advances in Material Technology Enable Game-Changing MLCC Performance

　　在材料技术的进步使游戏变电容性能

　　介绍

　　虽然电解电容器一直是解耦应用电容大于100µF的首选解决方案是必需的，这些设备的固有可靠性和使用寿命的问题，往往是失败的第一部分。在多层陶瓷电容（MLCC）技术的进展，现在设计人员提供一个高容量的替代传统的电解电容器。新的高附加值的MLCC提供更低的等效串联电阻（ESR）的优点和电感（ESL）比电解，并显示平均故障时间（MTTF）10000到1000000年。高价值的MLCC的应用包括汽车电子、医疗电子和工业设备。

　　本文介绍了太阳诱电的先进MLCC产品在材料科学。它还介绍了比较性能和价格数据，以显示这些陶瓷电容器如何负担显着的聚合物电容器的好处。

　　High capacitance MLCCS vs. polymer capacitors

　　High-capacitance MLCCs provide significant improvements over equivalent polymer capacitors. Comparisons of performance and price demonstrate the potential for MLCCs to displace polymer capacitors in designs that require high-capacitance values and/or other system-level improvements.

　　Performance comparisons

　　Aside from the mechanical advantages that the solid-state nature of the MLCC topology provides in comparison to electrolytic devices， a number of significant electrical performance improvements are also evident.

　　Lower ESR and ESL

　　Figure 1 shows the lower equivalent series resistance （ESR） and equivalent series inductance （ESL） of 100 µF， 220 µF and 330 µF MLCCs compared with a 330 µF polymer capacitor. In addition to the reduced system losses from lower ESR and ESL values， the case size and printed circuit board footprint of the MLCCs are dramatically smaller as well.