The coupled inductor single-input dual-output (CI-SIDO) dc-dc converter is an alternative to multiple parallel dc-dc converters for applications requiring multiple regulated supplies. CI-SIDO exhibits the merits of reduced ripple, small volume, and high efficiency. However, the coupling of inductor currents results in coupled outputs leading to cross-coupling and cross-regulation problems. Due to cross-coupling of the output voltages, the compensator design becomes complex. This article proposes a decoupled voltage-mode control to address the issue of cross-coupling of output voltages. It also demonstrates the stability boundary for controller design. The proposed controller is designed using simple analog Type-II compensator. A systematic compensator design procedure is also developed. The proposed controller decouples the output voltages, ensures good stability margin as well as good load regulations and audio-susceptibility. The design is verified through simulation and experiments. The experimental results shows that the decoupled control significantly suppresses the cross-regulation with fast transient response speed for the load, input, and reference variation. A transient performance comparison of proposed decoupled voltage-mode control for the CI-SIDO buck converter with state-of-art control methods for the single-inductor SIDO buck converter is also presented.

中文翻译：

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耦合电感单输入双输出降压转换器的解耦电压模式控制


对于需要多个稳压电源的应用，耦合电感器单输入双输出 (CI-SIDO) DC-DC 转换器是多个并联 DC-DC 转换器的替代方案。 CI-SIDO具有纹波小、体积小、效率高等优点。然而，电感器电流的耦合导致耦合输出，从而导致交叉耦合和交叉调节问题。由于输出电压的交叉耦合，补偿器设计变得复杂。本文提出了一种解耦电压模式控制来解决输出电压交叉耦合问题。它还演示了控制器设计的稳定性边界。所提出的控制器是使用简单的模拟 II 型补偿器设计的。还开发了系统的补偿器设计程序。所提出的控制器对输出电压进行解耦，确保良好的稳定性裕度以及良好的负载调节和音频敏感性。通过仿真和实验验证了该设计。实验结果表明，解耦控制显着抑制了负载、输入和参考变化的快速瞬态响应速度的交叉调节。还对所提出的 CI-SIDO 降压转换器解耦电压模式控制与单电感器 SIDO 降压转换器的最先进控制方法进行了瞬态性能比较。