A three-level boost converter enables efficient voltage 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 generates 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 mm2 active area. This converter achieves 96.8% peak efficiency and an 83-mA peak output current, with an 8 $\times $ peak step-up conversion ratio.

中文翻译：

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具有全范围自动电容补偿脉冲频率调制的三电平升压转换器

三电平升压转换器通过降低传统升压转换器中的电感和阻断电压要求，实现具有高功率密度的高效升压功率转换。提出了一种结合峰谷电流模式控制的自动电容器补偿脉冲频率调制 (ACC-PFM) 控制器，以解决飞跨电容器电压不平衡的问题，以及调节输出电压。电容平衡通过延迟均衡电平转换器得到进一步加强，该转换器产生的占空比仅为亚纳秒级偏差。从 0.3-3.0 V 的输入电压到 2.4-5.0 V 的输出电压的升压功率转换是通过一个原型转换器演示的，该转换器在 65-nm CMOS 工艺中实现，有 0.28 mm2 有源面积。该转换器达到 96。