• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Design of integrated high-voltage power converters and their applications in solid-state LED lighting systems
【24h】

Design of integrated high-voltage power converters and their applications in solid-state LED lighting systems

机译：集成高压功率转换器的设计及其在固态LED照明系统中的应用

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

High-voltage (HV) power converters can be easily found in electronic vehicles, renewable energy systems, medical equipment, solid-state Light Emitting Diode (LED) lighting systems, etc. They can greatly reduce bill-of-material (BOM) size and cost while improving scalability and reliability without compromising performance.;It is necessary to maximize the power density and the power efficiency of the HV power converters. Two integrated low-power and high-speed gate drivers in HV power converters are presented in this dissertation. The first capacitively coupled level shifter (CCLS)-based gate driver supports complimentary-metal-oxide-semiconductor (CMOS) power train, and the second dynamically controlled level shifter (DCLS)-based gate driver enables dual-nMOS power train. Implemented in a 0.5-mum 120-V CMOS process, both proposed CCLS and DCLS have improve the figure of merit (FoM) by at least 10 times and 2.9 times compared with state-of-the-art level shifters. The buck converter with the CCLS-based gate driver achieves a maximum efficiency improvement of 11.5%.;HV power converters have also been used for high-brightness solid-state LED lighting applications. Previously-reported dimmable LED drivers from industry and literature are unable to simultaneously meet contradictory performance requirements on input range, power efficiency, settling time, and current accuracy. This dissertation presents a glitch-tolerant synchronous current control scheme and advanced HV current sensors to improve the performances of LED drivers. Implemented in a 50-V 0.35-mum CMOS process, experimental results show that the proposed LED driver supports a wide input range from 5 V to 45 V, operates up to 4 MHz. The proposed LED driver achieves a peak power efficiency of 97.2% and the current deviation <3.3% of the average LED current under different conditions.;Finally, a wide input range 5 - 115-V dimmable LED driver in 120-V 0.5-mum CMOS is presented. In this work, an auto-configurable switching scheme and adaptive resonant timing control are developed to enable soft-switching for improving the converter power efficiency under wide input range. Hence, a high peak power efficiency of 94.4% is achieved. Adaptive synchronous current control is also proposed to enhance the current accuracy of the LED driver to within 6.4% over wide ranges of input and output voltages.
机译：高压（HV）功率转换器可以在电子车辆，可再生能源系统，医疗设备，固态发光二极管（LED）照明系统等中轻松找到。它们可以大大减小物料清单（BOM）的尺寸和成本，同时在不影响性能的情况下提高可扩展性和可靠性。;必须最大化HV电源转换器的功率密度和功率效率。本文介绍了高压电源转换器中的两个集成式低功耗和高速栅极驱动器。第一个基于电容耦合电平移位器（CCLS）的栅极驱动器支持互补金属氧化物半导体（CMOS）动力总成，第二个基于动态控制电平移位器（DCLS）的栅极驱动器实现双nMOS动力总成。与最先进的电平转换器相比，建议的CCLS和DCLS均采用0.5微米的120V CMOS工艺实现，其品质因数（FoM）至少提高了10倍和2.9倍。带有基于CCLS的栅极驱动器的降压转换器可实现最大11.5％的效率提升。HV功率转换器也已用于高亮度固态LED照明应用。先前从行业和文献中报告的可调光LED驱动器无法同时满足对输入范围，功率效率，建立时间和电流精度的矛盾性能要求。本文提出了一种抗毛刺的同步电流控制方案和先进的高压电流传感器，以提高LED驱动器的性能。实验结果表明，采用50V 0.35um CMOS工艺实现的LED驱动器支持5V至45V的宽输入范围，最高工作频率为4MHz。拟议中的LED驱动器在不同条件下可实现97.2％的峰值功率效率，电流偏差<平均LED电流的3.3％。最后，在120V0.5-μm的输入范围为5-115V可调光LED驱动器介绍了CMOS。在这项工作中，开发了一种可自动配置的开关方案和自适应谐振时序控制，以实现软开关，从而在宽输入范围内提高了转换器的功率效率。因此，实现了94.4％的高峰值功率效率。还提出了自适应同步电流控制，以在较大的输入和输出电压范围内将LED驱动器的电流精度提高到6.4％以内。

著录项

  • 作者

    Liu, Zhidong.;

  • 作者单位

    The University of Texas at Dallas.;

  • 授予单位 The University of Texas at Dallas.;
  • 学科 Electrical engineering.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 158 p.
  • 总页数 158
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 康复医学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号