← 返回 JSSC 论文列表JSSC 2022第12期Power Management0.18-µm
A 12V/24V-to-1V PWM-Controlled DSD Converter With Delay-Insensitive and Dual-Phase Charging Techniques for Fast
提出一种12V/24V至1V PWM控制的双降压转换器，具有延迟不敏感和双相充电技术。
0.18-µm BCD, 1-MHz, 88.3% (12V-to-1V), 83.5% (24V-to-1V)
PWM控制双降压转换器延迟不敏感双相充电BCD工艺
▸创新点1：延迟不敏感技术（方法创新）——通过引入延迟不敏感技术，确保在不同瞬态发生时间下，PWM控制器仍能实现近最优的瞬态响应，显著提升了系统的鲁棒性和动态性能。
▸创新点2：双相充电技术（电路创新）——采用双相充电技术，将瞬态响应速度提升了两倍，有效减少了电压跌落和恢复时间，提升了系统的整体效率和稳定性。
▸创新点3：双反馈环路控制（系统创新）——设计了双反馈环路控制系统，分别调节输出电压和飞跨电容电压，实现了更精确的电压调节和更高的转换效率，峰值效率达到88.3%（12V-to-1V）和83.5%（24V-to-1V）。
▸创新点4：全集成功率晶体管（电路创新）——所有功率晶体管均集成在0.18-µm BCD工艺芯片上，减少了外部元件数量，提高了系统的集成度和可靠性，同时降低了成本和功耗。
Abstract
A 12V/24V-to-1V pulsewidth modulation (PWM) controlled double step-down (DSD) power converter with delay-insensitive and dual-phase charging techniques is pre- sented. The proposed PWM controller has two feedback loops to regulate the output voltage and the voltage across the flying capacitor, respectively. With the proposed delay-insensitive tech- nique, near-optimal transient responses are achieved by using the PWM control regardless of the time of occurrence of the transient. Moreover, the responses are further improved by two times by using the proposed dual-phase charging technique. The converter was fabricated in a 0.18- µm BCD process with all power transistors integrated on chip. For 12V-to-1V conversion and 24V-to-1V conversion, the measured peak efficiencies at 1-MHz switching frequency are 88.3% and 83.5%, respectively. With a load current step of 3 A and a rise time of 20 ns, the measured voltage droop and 1% settling time are 56 mV and 0.9 µs, respectively.