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本文提出一种负载无关的开关DC-DC转换器控制方法，通过自由轮电流反馈和比较器控制替代传统误差放大器反馈，消除了负载变化对闭环响应的影响，无需复杂的补偿器设计，特别适用于单电感多输出转换器。
KAIST, Daejeon, Korea JDA Technology, Daejeon, Korea 3 LG Electronics, Pyungtaek, Korea 2 Previously reported switching DC-DC converters have feedback loops incorporating error amplifiers to regulate their output voltages. Hence, load variation affects the closed-loop response and should be considered in compensator design, which fundamentally limits the closed-loop performance of switching converters. In this paper, a load-independent converter with freewheeling current feedback, whose output is controlled by a comparator, is presented. This control method is very useful for single-inductor multiple-output (SIMO) converters [1-3]. Figure 24.7.1 shows the architecture of a synchronous boost converter with freewheeling current feedback. Unlike conventional converters, an error amplifier (EA), rather than the converter output Vo, is used to regulate the freewheeling current If. If is sensed and is forced by the feedback to follow a reference level
Young-Jin Woo1, Hanh-Phuc Le2, Gyu-Ha Cho2, Gyu-Hyeong Cho1, Seong-Il Kim3