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中文摘要：
提出了一种临界连续模式（CRM）单电感双输出（SIDO）Buck功率因数校正（PFC）变换器及其控制策略,并分析了其工作特性。通过对电感的分时复用控制,实现了2个输出支路的独立控制。在输入电压接近各输出支路电压情况下,控制器限制了开关管的最小关断时间,解决了工作于CRM时电感在输入电流过零点附近难以分时复用控制的问题,并抑制了电感在输入电流过零点附近的复用频率。相对于传统两级结构的多路输出PFC变换器,CRM SIDO Buck PFC变换器减少了控制器与电感的数量,降低了变换器的体积与成本,并提高了变换器的效率。实验结果验证了所提变换器高效率、高功率因数以及2个输出支路的高输出精度控制特性。
英文摘要：
A kind of SIDO（Single-Inductor Dual-Output）Buck PFC （Power Factor Correction） converter operating in CRM（CRitical continuous conduction Mode） is proposed with the control strategy and its operating characteristics are analyzed. The time-sharing multiplexing of the single inductor is controlled to achieve the independent regulation of two output circuits. The minimum turn-off time of power switch is limited by the controller when the input voltage is close to the voltage of each output branch for facilitating the time-sharing multiplexing control and reducing the multiplexing frequency when the inductor is operating in CRM and the input current is near the zero-crossing point. Compared with the conventional two-stage multi-output PFC converter,this SIDO PFC converter has less controller and inductor,resulting in smaller size,lower cost and higher efficiency. Experimental results show the excellent control performance of the proposed converter：high efficiency,high power factor and high output accuracy.
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