To optimize the transient performance,burst mode characteristics,and light load efficien-cy of LLC converter,a hybrid hysteresis control method and converter implementation scheme for LLC are proposed.On the basis of in-depth analysis of the principle of hybrid hysteresis control and the design method of symmetrical half bridge LLC converter,the application method of analog controller based on hybrid hysteresis control and the key parameter design of 200W symmetrical half bridge LLC converter are proposed,including peripheral circuit design of the controller,symmetrical half bridge circuit design,switcher driving circuit design,LLC resonant parameter design,and they are detailed verified through the experimental prototype.The experimental results indicate that the proposed hybrid hysteresis control method and the application design of the controller are scientifically feasible.
关键词
混合滞环控制/LLC谐振变换器/UCC25640x/脉冲频率控制
Key words
hybrid hysteresis control/LLC resonant converter/UCC25640x/pulse frequency control
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