| 一种高可靠性LED照明驱动电路 |
| |
| 引用本文： | 董永军,徐明奇,张雪明.一种高可靠性LED照明驱动电路[J].灯与照明,2008,32(4). |
| |
| 作者姓名： | 董永军 徐明奇 张雪明 |
| |
| 作者单位： | 东北师范大学,物理学院,长春,130024 |
| |
| 基金项目： | 东北师范大学科技创新平台培育项目
|
| |
| 摘 要： | 根据LED照明灯具的特点,设计了一款恒流式驱动电路.此电路采用电容降压方式,为整个电路提供恒定的电流.利用TVS(瞬态电压抑制器)对LED进行过压保护,同时利用NTC(负温度系数热敏电阻)有效地降低了浪涌电流对LED的冲击,并利用PTC(正温度系数热敏电阻)将流过LED的电流限制在一定的范围内,从而延长了LED照明灯具的实际使用寿命,避免了频繁的维护与更换,并降低了成本.
|
| 关 键 词： | LED照明 恒流 浪涌 |
A Driving Circuit of LED Lighting with High Reliability |
| |
| Yongjun Dong,Mingqi Xu,Xueming Zhang.A Driving Circuit of LED Lighting with High Reliability[J].Light & Lighting,2008,32(4). |
| |
| Authors: | Yongjun Dong Mingqi Xu Xueming Zhang |
| |
| Affiliation: | Yongjun Dong,Mingqi Xu,Xueming Zhang (School of Physics,Northeast Normal University,Changchun 130024,China) |
| |
| Abstract: | In accordance with the characteristics of LED lamps,we design a driving circuit with constant-current.This circuit adopts the approach of capacitor step-down,which provides a constant current for the whole circuit.The use of TVS(transient voltage suppressor) on LED could afford over-voltage protection,while the use of NTC(thermistor of negative temperaturecoefficient) effectively reduces the impact of the surge current on LED and the use of PTC(thermistor of positive temperature coefficient) will limit the ... |
| |
| Keywords: | TVS NTC PTC |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
