A Linear Constant Current LED Driver without off-chip Inductor and Capacitor

被引：0
|
作者：
Wu, Xufeng [1 ]
Leng, Yahui [1 ]
He, Lenian [1 ]
Xi, Jianxiong [1 ]
机构：
[1] Zhejiang Univ, Inst VLSI Design, Hangzhou, Zhejiang, Peoples R China
来源：
2015 IEEE 13TH INTERNATIONAL NEW CIRCUITS AND SYSTEMS CONFERENCE (NEWCAS) | 2015年
关键词：
LED driver; linear constant current; efficiency; power factor;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A linear constant current light-emitting diode (LED) driver without off-chip inductor and capacitor is presented in this paper. The proposed driver consists of one resistor, one diode bridge and one controller integrated circuits (IC). The controller IC employs four LED strings and sequences their conduction to shape the output current in proportion to the input voltage. The controller IC was designed and implemented by using HHNEC 1 mu m 700V process. The experimental results show that high PF of 97.93% and efficiency of 90.41% under the input voltage of 220V|rms utility voltage were obtained.
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收藏
页数：4
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