LLC half-bridge resonance converter based on NCP1396

ZUO Le-le， ZHANG Wen-chao
（College of Electronic Information， Hangzhou Dianzi University， Hangzhou 310018，China）

Abstract： 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.
Key words： witching power supply；LLC half-bridge；zero voltage switching（ZVS）