⚡ 本页包含 AI 生成的分析内容,仅供参考
该论文提出一种具有残余电流控制的多输出升降压DC-DC转换器,通过优化控制环路补偿,允许误差放大器增益设置较小,从而简化稳定性设计。解决了传统电流模式控制中需要复杂补偿的问题。
Kyoung-Sik Seol1,4, Young-Jin Woo1, Gyu-Hyeong Cho1, Gyu-Ha Cho2, Jae-Woo Lee2, Sung-il Kim3 Control-loop compensation: There are two poles in the conventional CPM control loop (one is generated by the error amplifier, and the other by the output load and capacitor). Hence, for stability, dominant-pole compensation and zero insertion are needed at the error amplifier output. In contrast, as the role of C2 is only to discharge the remaining inductor current, the voltage across C2 does not have to be controlled tightly. As such, the gain of the error amplifier can be set to a small value and the dominant pole is not generated by the error amplifier. In the presented control loop, only one pole (from C2 and If) exists and this makes the control loop stable without the need for compensation even under wide load variation. Figure 26.1.2(b) shows the closed-loop gain of a conventional CPM controller (dashed line) and the
turned on. In this case, the amount of return current (If) should be increased., This can be done by simply increasing the duty ratio of Sd.