发表机构
University of Illinois Chicago（伊利诺伊大学芝加哥分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出一种数字控制的自适应功率转换框架，动态协同优化电感配置与开关频率，通过可重构电感架构和滞回控制，在宽负载范围内提升效率，仿真显示平均效率提升4.5个百分点，功率损耗降低32%。
AI 中文摘要
本文提出了一种数字控制的适应性功率转换框架，该框架动态协同优化电感配置和开关频率，以在广泛的负载条件下实现高效率。传统降压转换器通常针对单一工作点进行优化，导致在动态负载下因电感、开关频率和负载电流之间的不匹配而出现效率下降。为解决这一局限，提出了一种可重构电感架构。通过这种方法，有效电感和开关频率在运行时由片上数字控制器进行调整。开发了一种端到端的设计方法论，整合了基于物理的分析建模、有限元法（FEM）仿真以及优化框架，以确定负载范围内的优选工作点。所得配置存储在查找表中，并通过低开销的控制方案实时实现。该系统明确考虑了电感和开关器件损耗，从而在电流纹波和连续导通模式（CCM）约束内实现导通损耗与开关损耗的协同优化。为确保快速负载瞬态下的稳健运行，引入了一种基于滞回的控制策略，以缓解由传感延迟引起的暂时性CCM违规。推导出了一个进入裕度条件，在该条件下，对于有界负载变化率，连续导通得到保证。仿真结果表明，相对于固定配置，平均效率提高了4.5个百分点，平均功率损耗降低了高达32%，突显了在具有动态负载分布的集成供电系统中自适应电感-频率管理的有效性。
英文摘要
This work presents a digitally controlled adaptive power conversion framework that dynamically co-optimizes inductor configuration and switching frequency to achieve high efficiency across a wide range of load conditions. Conventional buck converters are typically optimized for a single operating point, leading to efficiency degradation under dynamic loads due to mismatches between inductance, switching frequency, and load current. To address this limitation, a reconfigurable inductor architecture is proposed. With this approach, the effective inductance and switching frequency are adjusted at runtime with on-chip digital controller. An end-to-end design methodology is developed, integrating physics-based analytical modeling, finite element method (FEM) simulations, and an optimization framework to determine preferred operating points across the load range. The resulting configurations are stored in a lookup table and implemented in real time through a low-overhead control scheme. The system explicitly accounts for both inductor and switching device losses, enabling co-optimization of conduction and switching losses within current ripple and continuous conduction mode (CCM) constraints. To ensure robust operation under fast load transients, a hysteresis-based control strategy is introduced to mitigate temporary CCM violations caused by sensing latency. An entry-margin condition is derived under which continuous conduction is guaranteed for a bounded load slew rate. Simulation results demonstrate a 4.5 percentage-point improvement in average efficiency and up to a 32% reduction in average power loss relative to fixed configurations, highlighting the effectiveness of adaptive inductance-frequency management in integrated power delivery systems with dynamic load profiles.
