Maxim,3S3P汽车尾灯LED驱动设计实现
品慧电子讯该应用笔记介绍了一个驱动尾灯(RCL) LED的参考设计，驱动器采用三串三并(3S3P)架构。参考设计使用线性驱动器MAX16823和外部BJT，能够为每串LED提供200mA驱动电流，改善了散热能力。设计包括PWM调光电路，用于调节尾灯亮度和满亮度刹车灯。设计中考虑了双电池和抛负载情况。
Abstract: This application note presents a reference design for a rear combination lamp (RCL) LED driver in a 3-series, 3-parallel (3S3P) configuration. Using the MAX16823 linear driver and external BJTs, this design provides 200mA per string as well as enhanced heat dissipation. Also included is PWM dimming circuitry for tail-light inputs and full brightness for brake-light inputs. Double-battery and load-dump conditions have been taken into consideration.
Overview
This reference design uses the MAX16823 3-channel linear LED driver and external BJTs to implement a 3S3P RCL driver circuit. Figures 1 and 2 present images of the PCB and attached heatsink; Figure 3 illustrates the layout of the design; and Figure 4 provides the schematic for the circuit.
The reference design is discussed in detail below, with analysis of the main circuit blocks, design specifications, and performance data.
Figure 1. PCB and attached heatsink.
Figure 2. Side view of the attached heatsink.
12下一页> 关键字：LED驱动 汽车尾灯 汽车电子 本文链接：http://www.cntronics.com/public/art/artinfo/id/80018378
Figure 3. Layout of the LED driver.
Figure 4. Schematic of the LED driver
了解设计详情，请点击下载：http://www.cntronics.com/public/whitepaper/download/id/898
<上一页12 关键字：LED驱动 汽车尾灯 汽车电子 本文链接：http://www.cntronics.com/public/art/artinfo/id/80018378?page=2
