A PLL-Based High-Stability Single-Inductor 6-channel Output DC-DC Buck Converter

📋 论文概要

提出了一种基于锁相环（PLL）的高稳定性单电感多输出（SIMO）DC-DC降压转换器，支持6个独立输出通道。该设计解决了传统PWM电流模式控制器在负载变化时稳定性差的问题，通过PLL实现恒定频率控制，提高了系统鲁棒性。

💡 主要创新点

• 采用PLL锁相环技术替代传统电流模式控制器，实现了多通道输出的频率同步和稳定性提升。
• 单电感同时调节6个独立输出通道，简化了外围电路，适用于便携多电压应用。
• 通过PLL的相位锁定机制，有效抑制了负载变化对输出稳定性的影响，无需复杂补偿网络。

🏷 关键词

📄 原文摘要

particular for portable systems where typically multiple voltage levels are required to achieve multi functionality. To meet these requirements, a singleinductor multiple-output (SIMO) switching converter is a very strong candidate. SIMO converters have been the subject of many recent studies and reports [13]. The presented converters uses the current-mode controller and PWM with a constant switching frequency. However, designing the feedback control loop of the PWM converters is not an easy task since their stability inherently depends on the load conditions. Among the switching DC-DC buck converters, the bang-bang-controlled converter is the simplest switching regulator to implement. This structure is extremely fast at reaching to load transients due to a wide bandwidth of the control loop. Unlike current- or voltage-mode-controlled converters using PWM,

👥 作者与机构

Kwang-Chan Lee1, Chang-Seok Chae1, Gyu-Ha Cho2, Gyu-Hyeong Cho1, 1

KAIST, Daejeon, Korea JDA Technology, Daejeon, Korea 2 Cost and size are very important issues for power-management ICs (PMICs), in