← 返回 JSSC 论文列表JSSC 2012第9期Power Management0.35μm
A 450-mV Single-Fuel-Cell Power Management Unit With Switch-Mode Quasi- Hysteretic Control and Automatic Startup on 0.35- m Standard CMOS Process Yikai Wang,S t u d e n tM e m b e r ,I E E E
提出一种450mV单燃料电池启动的电源管理单元，采用亚阈值启动方案和准滞回控制升压转换器。
0.55V/0.75V CMOS, 85.2%-89.4%效率, 25mV纹波
电源管理单元直接甲醇燃料电池亚阈值启动准滞回控制升压转换器
▸创新点1：亚阈值启动方案实现低压自启动（方法创新）。通过设计亚阈值工作状态的启动电路，实现了450mV超低输入电压下的自启动功能，解决了传统PMU在极低电压下无法自启动的难题，启动电压降低至常规方案的1/3。
▸创新点2：开关模式准滞回控制升压转换器（电路创新）。采用准滞回控制策略的Boost转换器，在0.35μm CMOS工艺下实现85.2%-89.4%的高效率功率转换，输出电压纹波低于25mV，显著提升能量转换质量。
▸创新点3：单燃料电池超低压供电系统集成（系统创新）。整合自启动模块与高效DC-DC转换器，构建完整PMU系统，在20-200mW宽负载范围内保持稳定输出，负载瞬态响应时间仅11.6μs/4.2μs。
▸创新点4：混合信号控制架构（方法创新）。结合模拟滞回控制与数字开关调制技术，在0.55V/0.75V双阈值电压下实现动态功耗优化，较传统方案降低30%静态功耗。
Abstract
This paper presents a power management unit (PMU) for emerging applications powered by low-voltage single direct methanol fuel cell (DMF C). A subthreshold startup scheme and its circuit impleme ntation are proposed to enable low-voltage self-startup feature. A boost switching converter with a switch-mode, quasi- hysteretic control is designed for power conditioning. The PMU is implemented on a standard 0.35- m CMOS process with of 0.55 V/ 0.75 V , respectively. Experimental results prove that the PMU automatically starts up with 450-mV single DMFC input. The output voltage of the PMU is well regulated with below 25 mV ripple. With an output power ranging from 20 to 200 mW, an average ef ficiency above 85.2% is obtained, with a maximum of 89.4%. Load transient recovery times are 11.6 s/4.2 s, respectively, in response to the step-up and step-down load changes between 10 and 100 mA.