J4 ›› 2012, Vol. 39 ›› Issue (2): 181-185.doi: 10.3969/j.issn.1001-2400.2012.02.030

• 研究论文 • 上一篇    下一篇

电子镇流器中的波峰因数过流保护电路

史凌峰1,2;曹成美1,2;任娟丽1,2;康辉1,2
  

  1. (1. 西安电子科技大学 电路CAD研究所,陕西 西安  710071;
    2. 西安电子科技大学 超高速电路设计与电磁兼容教育部重点实验室,陕西 西安  710071)
  • 收稿日期:2011-05-03 出版日期:2012-04-20 发布日期:2012-05-21
  • 通讯作者: 史凌峰
  • 作者简介:史凌峰(1970-),男,副教授,博士,E-mail: lfshi@mail.xidian.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(60876023);超高速电路设计与电磁兼容教育部重点实验室基金资助项目(JY0100092702)

Crest factor over-current protection circuit in the electronic ballast

SHI Lingfeng1,2;CAO Chengmei1,2;REN Juanli1,2;KANG Hui1,2   

  1. (1. Inst. of Electronic CAD, Xidian Univ., Xi'an  710071, China;
    2. Ministry of Education Key Lab. of High-Speed Circuit Design and EMC, Xidian Univ., Xi'an  710071, China)
  • Received:2011-05-03 Online:2012-04-20 Published:2012-05-21
  • Contact: SHI Lingfeng

摘要:

提出一种波峰因数过流保护电路.利用外部低端驱动管的导通电阻来实现谐振电感电流的采样,并且通过对波峰因数的测量实现过流检测,完成对谐振电感的过流保护,从而延长电子镇流器的使用寿命.基于0.5μm BCD工艺,在典型情况下,通过Cadence Hspice工具仿真验证,结果表明该电路能够可靠实现对谐振电感的过流保护.

关键词: 波峰因数过流保护, 电流采样, 低通滤波

Abstract:

A crest factor over-current protection circuit is presented. The resistance of the low-side drive tube is used to realize resonant inductor current sampling and  crest factor measurement is taken to obtain over-current protection. The circuit is completed on over-current protection for different resonant inductors, so that it extends the work time of electronic ballasts. Typically in the 0.5μm BCD(Bipolar, CMOS, DMOS) process, Hspice simulation results show that the designed circuit can accurately realize over-current protection for the resonant inductor.

Key words: crest factor over-current protection, current sample, low-pass filter

中图分类号: 

  • TP13