← 返回 JSSC 论文列表JSSC 2020第3期Power Management65nmBoost Converter
A Three-Level Boost Converter With Full-Range Auto-Capacitor-Compensation Pulse Frequency Modulation Wen Chuen Liu , Student Member , IEEE,P e iH a nN g
提出一种三电平升压转换器，采用自动电容补偿脉冲频率调制控制器，实现高效电压转换。
0.3-3.0V输入, 2.4-5.0V输出, 96.8%峰值效率, 83mA峰值输出电流, 8倍升压比
三电平升压转换器自动电容补偿脉冲频率调制高效转换CMOS工艺
▸创新点1：三电平升压转换器结构（电路创新） - 通过减少传统升压转换器中的电感和阻断电压要求，实现了高效电压升压功率转换和高功率密度，支持0.3-3.0V输入电压和2.4-5.0V输出电压范围，峰值效率达96.8%。
▸创新点2：自动电容补偿脉冲频率调制（ACC-PFM）控制器（方法创新） - 结合峰值和谷值电流模式控制，解决了飞跨电容电压不平衡问题，同时实现了输出电压的精确调节，提升了系统稳定性和效率。
▸创新点3：延迟均衡电平移位器（电路创新） - 通过生成仅亚纳秒级偏差的占空比，进一步增强了电容平衡能力，确保了高精度和低噪声的功率转换性能。
▸创新点4：高转换比设计（系统创新） - 实现了8倍的峰值升压转换比，并在65nm CMOS工艺中仅占用0.28mm²的主动面积，展示了高集成度和低功耗的优势。
Abstract
A three-level boost converter enables efficient volt- age step-up power conversion with high power density by reducing the inductance and blocking voltage requirements in a conventional boost converter. An auto-capacitor-compensation pulse frequency modulation (ACC-PFM) controller, combining peak and valley current-mode controls, is proposed to resolve the issue of unbalanced flying capacitor voltage, as well as to regulate the output voltage. The capacitor balance is further strengthened through a delay-equalized level shifter that gener- ates duty ratios with only sub-nanosecond deviations. The step- up power conversion from the input voltage of 0. 3–3.0 V to the output voltage of 2.4–5.0 V is demonstrated through a prototype converter implemented in a 65-nm CMOS process with 0.28 mm 2 active area. This converter achieves 96.8% peak efficiency and an 83-mA peak output current, with an 8 × peak step-up conversion ratio.