《毕业设计》
文献翻译
院系：电子电气工程学院学号：021309208
姓名：吴骁奕
指导教师：曾国辉
完成时间：2013/2/15
文献翻译
021309208 吴骁奕
A Flexible LED Driver for Automotive Lighting Applications: IC Design and E xperimental Characterization
一个灵活的LED驱动汽车照明应用:集成电路设计和实验特征
Abstract—This letter presents a smart driver for LEDs, particularly
摘要：这文章提出了一个智能驱动发光二极管，
for automotive lighting applications, which avoid ringing
尤其是用于避免振荡和超调现象的汽车照明应用上，
and overshoot phenomena. To this aim, advanced Soft Start and
为了这个目的，在芯片上集成了优化软启动和电流升降控制技术。Current Slope Control techniques are integrated on-chip. This letter
这篇文章讨论了设计于集合于高电压的互补金属氧化半导体上的驱动技术，
discusses the driver design integrating in high voltage CMOS
technology, the digital circuitry for programming and electronic
用于编程和电子控制单元连接的数字电路以及功率元件提高到10瓦特。
control units interfacing, and the power devices up to 10W. Experimental
同时也展示了不同功率等级使用的发光二极管和与不同类型的连接时的实验特征。
characterizations with LEDs of different power levels and
with different types of connections are showed. The smart driver
这个智能的驱动适用于可调节的温度和电压需求。
sustains automotive temperature and voltage requirements; moreover
此外，它有很高的功率效率，它是可编程的，还可以配置用于线性的调节器。
it has high power efficiency, it is programmable, and can be
configured to work as a linear regulator (for low current LEDs) or
in switch mode (for higher power LEDs).
（用于弱电流发光二极管）或转换模式（用于高功率发光二极管）IndexTerms—Automotive electronics, high voltage (HV)CMOS,
integrated circuit (IC), LED driver.
关键词—汽车用电子设备，高电压互补金属氧化物半导体，集成电路
LED驱动
I. INTRODUCTION
1：介绍
IN the last few years LED technology experienced a very fast
在过去的几年中，发光二极管技术在汽车照明应用中替代普通灯泡经历了一个非常快速的进步时代，
and important growth, superseding the bulb technology in
automotive lighting applications [1]. To achieve the harsh requirement
of CO2 emission and reduce the fuel consumption,
car manufacturer must reduce the total power consumption. The
为了实现了严格的二氧化碳排放要求和降低了燃料的消耗,
汽车制造商必须减少总的功率消耗。
adoption of LEDs in place of bulbs permits to have about five
times less power consumption at equal output lighting intensity.
采用发光二极管代替灯泡在同等输出功率照明强度下损耗将降低五倍。
LEDs have reached quality and reliability factors that permit
their use in automotive harsh environment and in addition
发光二极管已达到质量和可靠性因素,可保证他们可使用在汽车的严
酷环境下并且他们的成本是降低的。
their cost is decreasing. However, LEDs are pretty difficult to
事实上，发光二极管是很难驱动，因此相比较普通灯泡，发光二极管驱动要求更多的技巧和控制功能。
drive and therefore LED-drivers require many tricks and control
functions compared to bulb drivers. Moreover, automotive
而且，汽车应用程序需要紧凑和低成本的解决方案,灵活
足够的数字电子控制单元界面，
applications require compact and low-cost solutions, flexible
enough to be interfaced to digital electronic control units (ECU)
and to cope with different wiring configurations and relevant
同时需要应付不同的布线配置和相关拓展。
parasitics [2]. Automotive lighting systems should be also robust
汽车照明系统也应该对电磁干扰(EMI)和超温、过流以及过电压现象有应变能力。
with respect to electromagnetic interference (EMI) and
to overtemperature, overcurrent, and overvoltage phenomena,
such as those due to ringing effects generated by resonance of
例如那些由于激振效应所产生的共振的线电感和连接器电容。
wire inductance and connector capacitance. Usually, in car environment
通常,在汽车环境中，几米长电线使用,就会生成强烈振荡。
few meters long wires are used, generating dumped
oscillations. Such oscillations and the associated overcurrent
and overvoltage levels reduce the LED life time and its efficiency
这种振荡和与之相关的过电流和过电压会降低发光二极管寿命及其效率。
[3]. To avoid or limit these effects the LED cannot be
driven by a mechanical relay but a smart driver is required to
control the slope of the LED current during transient, keeping it
为了避免或限制这些影响发光二极管不能由一个机械继电器控制但智能的驱动被要求需要在瞬态控制LED电流的斜率，以保持它在电线
