A 3-Phase Digitally Controlled DC-DC Converter with 88% Ripple Reduced 1-Cycle Phase Adding/Dropping Scheme and 28% Power Saving CT/DT Hybrid Current Control

📋 论文概要

提出了一种三相数字控制DC-DC转换器，采用单周期相位增加/丢弃方案，成功将输出纹波降低88%，解决了传统有源相数控制过渡时因电流重新分布导致的电压扰动问题。

💡 主要创新点

• 提出1-cycle phase adding/dropping scheme，实现相位切换在单个开关周期内完成，减少电压扰动。
• 数字控制架构结合三相设计，实现88%的纹波抑制效果。

🏷 关键词

📄 原文摘要

wide range of load current, especially for today’s multicore SoCs, which usually have a wide range of current profile. Active-phase-count (APC) control, as proposed in [1-3], is the key technique that offers the wide load range, and dynamically adjusts the number of phases according to load conditions. However, an APC transition induces a voltage disturbance due to current redistribution among phases. This makes the APC control only suitable for a voltage regulator with large output capacitors beyond 1000μF, or with high switching frequency beyond 10MHz [4] that hardly delivers more than 2A current with a good efficiency. To mitigate the disturbance impact, [2] has proposed adding or dropping a phase slowly, to allow the PID control to gradually redistribute the phase currents. However, the load current may change

👥 作者与机构

Chen Kong Teh, Atsushi Suzuki, Manabu Yamada,

Mototsugu Hamada, Yasuo Unekawa Toshiba, Kawasaki, Japan Multiphase DC-DC converters are essential to provide good efficiency over a