With the increasing demand of applications that have two different output voltages, the single-input dual-output (SIDO) converter with fewer components is becoming the cost-effective option instead of employing two single-input single-output converters. However, the cross-regulation of different outputs is still a challenge in SIDO converters design. To save cost and obtain improved cross-regulation performance, a novel SIDO converter consisting of three active switches is proposed in this article. Owing to the use of a voltage multiplier circuit, a high step-up voltage conversion ratio is achieved with relatively low voltage stress of switches. Thanks to the independent power flow and two control variables, the cross-regulation performance is improved, and simultaneous buck as well as boost output voltages is realized. Additionally, all switches can achieve zero-voltage switching operation, which contributes to a significant switching loss reduction. The operation characteristics, design considerations, and control strategy of the proposed converter are analyzed. To verify the theoretical analysis and measure the power efficiency, a prototype circuit with 48 V input and 24 V/2 A, 200 V/1 A outputs is built.

中文翻译：

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具有同步升压和降压电压转换功能的基于三开关的单输入双输出转换器

随着具有两种不同输出电压的应用的需求不断增长，具有更少组件的单输入双输出（SIDO）转换器已成为具有成本效益的选择，而不是采用两个单输入单输出转换器。但是，在SIDO转换器设计中，不同输出的交叉调节仍然是一个挑战。为了节省成本并获得改善的交叉调节性能，本文提出了一种由三个有源开关组成的新型SIDO转换器。由于使用了电压倍增电路，在开关的电压应力相对较低的情况下实现了高升压电压转换比。由于具有独立的功率流和两个控制变量，因此改善了交叉调节性能，并同时实现了降压和升压输出电压。另外，所有开关都可以实现零电压开关操作，从而大大降低了开关损耗。分析了该转换器的工作特性，设计注意事项和控制策略。为了验证理论分析并测量电源效率，构建了具有48 V输入和24 V / 2 A，200 V / 1 A输出的原型电路。