基于NCP1396的LLC半桥型谐振变换器

为解决开关电源的高效率、低损耗、EMI小等问题,将LLC半桥型谐振技术应用到开关电源中。在整个工作范围内,LLC半桥型谐振变换器实现了零电压转换(ZVS),减小了开关损耗。介绍了LLC半桥型谐振变换器的工作原理,提出了一种以NCP1396为控制芯片的开关电源的设计方法,并进行了实际试验。实验结果表明,提出的设计方法能够实现零电压转换,有效地提高了开关电源的效率。

LLC half-bridge resonance converter based on NCP1396

In order to solve the problems of high efficiency,low loss and small EMI,the LLC half-bridge resonant technology was used in switching power supply. By LLC half-bridge resonant converter the zero voltage switching （ZVS） in the entire range of running was realized, the switching loss was reduced. The operating principle of LLC resonant converter was introduced, and a design method of switching power supply based on the chip NCP1396 was proposed,actual test was carried out furthermore. The experimental results show that the design method can achieve ZVS and improve the efficiency of switching power supply effectively.