电子元件与材料Issue(12)：85-88,4.DOI:10.14106/j.cnki.1001-2028.2015.12.021
一款简单的对温度自适应的LED驱动电路设计
Design of a simple LED drive circuit with self-adaptive to temperature
摘要
Abstract
A LED drive circuit with self-adaptive to temperature was designed. In this drive circuit, hysteresis thermal-shutdown circuit and self-adaptive circuit were integrated into one modular, that largely simplied the circuit. Hysteresis thermal-shutdown circuit would export an off signal to stop circuit operation when the system was at a high temperature, and self-adaptive circuit would produce a negative temperature coefficient to regulate the value of output current, which achieved the purpose of self-adaptive. Based on 0.5μm standard CMOS technology, the Spectre simulation results show that the variances of driving current is less than 0.57% when ambient temperature varies at 0-70℃. The maximum adjustable amplitude of driving current is 100 mA from 70℃ to 105℃. And when the temperature rises up to 108℃, the output circuit would turn off and wouldn’t restart until the temperature drops back to 65℃.关键词
自适应/滞回关断/恒流/负温度系数电流/LED驱动/可调幅度Key words
self-adaptive/hysteresis thermal-shutdown/constant current/negative temperature coefficient current/LED driver/adjustable amplitude分类
信息技术与安全科学引用本文复制引用
邓玉斌,曾以成,陈星燕..一款简单的对温度自适应的LED驱动电路设计[J].电子元件与材料,2015,(12):85-88,4.基金项目
国家自然科学基金资助 （）
