A Temperature-Based Hysteresis Buck Converter for Dynamic Current Sharing

• 作者: Chinghwa Cheng Dongey Liu Hongchong Wu Longkai Zhang Miinshyue Shiau Weidian Lai Ziwei Zheng
• 来源期刊: 电路与系统(英文)
• 学科: 医学
• 关键词: Load Current SHARING Uninterruptible Power Systems UPS Voltage REGULATOR Temperature-Based SHARING
• 年，卷（期）: 2018,（12）
• 页码范围: 213-223
• 页数: 11页
• 分类号: R73

摘要

In this study, a temperature-based current sharing strategy rather than equal sharing for loads was applied to promote the reliability of uninterruptible power systems (UPS). According to the temperature of each power supply module in a UPS, it would be better to reduce the output current ratio for a hotter supply module in the UPS. In this design, we implemented our regulation circuits by the UMC 0.25-μm CMOS technology with an input range from 3 V to 4.2 V and the regulated output at 1.1 V. The rated output current was 100 mA for each phase. We also employed a current-mode error-correction circuit to improve the current sharing performance based on the averaged current of each phase at the same temperature. According to our simulation results, the current sharing error can be restricted within ± 5% for the supply modules at the same temperature in our system.