Challenges and Solutions for Non-Inverting Buck-Boost Converters

Anmol Sharma, G. Thiele, J. Kirchner, T. Keller, Manuel Wiersch
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引用次数: 2

Abstract

This paper discusses several challenges in the design of non-inverting buck-boost regulators. These range from the design of control loop to operation in various regions and associated issues. Several novel schemes are introduced like a universal timer which could work in all the regions of buck-boost, an adaptive region detector which provides optimum point of region-transition independent of input and output voltage measurements or load current and a simple state machine controlled trapezoidal regulation which enables efficient switching. These enable a peak current mode control with adaptive off-time to be maintained throughout all the regions preventing control loop discontinuities. All the ideas presented here are realized on a silicon integrated circuit. Subsequently these concepts are validated and proven through rigorous LAB analysis leading to a commercially usable product which generates adjustable outputs in the range of 1.8V to 5.2V from input voltages in the range of 1.3V to 5.5V.
非逆变降压-升压变换器的挑战和解决方案
本文讨论了设计非反相降压升压调节器的几个挑战。这些范围从控制回路的设计到各个区域的操作和相关问题。介绍了几种新方案,如可在降压升压的所有区域工作的通用定时器,可提供与输入输出电压测量或负载电流无关的最佳区域过渡点的自适应区域检测器,以及可实现高效切换的简单状态机控制的梯形调节。这使得峰值电流模式控制具有自适应关闭时间,可在所有区域保持,防止控制回路不连续。本文提出的所有思想都是在硅集成电路上实现的。随后,这些概念通过严格的LAB分析得到验证和证明,从而产生商用产品,从1.3V到5.5V的输入电压产生1.8V到5.2V范围内的可调输出。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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