A Dimmable and Power-compensated AC Direct LED Driver with High Efficiency

被引：0
|
作者：
Gu, Donglie [1 ]
Tang, Shengpeng [1 ]
Xi, Jianxiong [1 ]
He, Lenian [1 ]
Sun, Kexu [2 ]
机构：
[1] Zhejiang Univ, Inst VLSI Design, Hangzhou 310027, Zhejiang, Peoples R China
[2] Southern Methodist Univ, Dept Elect Engn, Dallas, TX 75275 USA
来源：
2016 INTERNATIONAL SOC DESIGN CONFERENCE (ISOCC) | 2016年
关键词：
soft self-commutating; power compensation; dimming; SCP; high efficiency;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
A dimmable and power-compensated AC direct LED driver with high efficiency for lighting applications is presented. A Source-Coupled Pair (SCP) is adopted to realize the soft self commutating. There is no additional sensing or control circuitry, which lower the system power dissipation. A pulse-width modulation (PWM) dimming technique is applied in regulating the LED's brightness. Furthermore, the driver includes a Power Compensation module which enables the output power of LEDs approximately constant under various line voltage. The LED driver IC is designed and implemented in CSMC's 700 V 1 urn BCD process. The post-layout simulation results show that under 220 V vertical bar rms AC voltage, the driver has a high efficiency of 90.28% and realizes dimming with a 90% duty ratio, 10 KHz dimming signal. The output power compensated only changes 4% under a 10% variation in input voltage.
引用
收藏
页码：343 / 344
页数：2
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