Advances in Material Technology Enable Game-Changing MLCC Performance

　　在材料技術(shù)的進(jìn)步使游戲變電容性能

　　介紹

　　雖然電解電容器一直是解耦應(yīng)用電容大于100μF的首選解決方案是必需的，這些設(shè)備的固有可靠性和使用壽命的問(wèn)題，往往是失敗的第一部分。在多層陶瓷電容（MLCC）技術(shù)的進(jìn)展，現(xiàn)在設(shè)計(jì)人員提供一個(gè)高容量的替代傳統(tǒng)的電解電容器。新的高附加值的MLCC提供更低的等效串聯(lián)電阻（ESR）的優(yōu)點(diǎn)和電感（ESL）比電解，并顯示平均故障時(shí)間（MTTF）10000到1000000年。高價(jià)值的MLCC的應(yīng)用包括汽車(chē)電子、醫(yī)療電子和工業(yè)設(shè)備。

　　本文介紹了太陽(yáng)誘電的先進(jìn)MLCC產(chǎn)品在材料科學(xué)。它還介紹了比較性能和價(jià)格數(shù)據(jù)，以顯示這些陶瓷電容器如何負(fù)擔(dān)顯著的聚合物電容器的好處。

　　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.