⚡ 本页包含 AI 生成的分析内容，仅供参考
本文针对多相降压转换器中输出电容阻抗变化导致电流传感精度下降的问题，提出了一种电容电流传感器校准技术。该技术通过精确获取输出电容电流，优化了负载瞬态响应，显著减小了输出电压下冲和稳定时间。
causes a large output voltage undershoot ΔVUS and long settling time ts if the transient responses are slow [1]. Since the output capacitor current ICo instantly reflects ΔIload, transient response optimization for minimizing ΔVUS and ts with given charging and discharging slopes of inductor current ILo can be achieved by obtaining an accurate ICo and well-controlling the ILo charging time tch and discharging time tdch [1]. However, ICo sensing accuracy is degraded if the output capacitor’s impedance ZCo, comprising the capacitance CO, equivalent series resistance RESR and inductance LESL, varies with different output voltage VO, process variation, and/or PCB parasitics, leading to non-minimized ΔVUS and ts. An off-chip capacitor-current-sensor (CCS) calibration technique is reported in
Szu-Yu Huang, Kuan-Yu Fang, Yi-Wei Huang, Shih-Hsiung Chien, Tai-Haur Kuo
National Cheng Kung University, Tainan, Taiwan For switching DC-DC converters, a large and rapid load-current transient ΔIload