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参数

Topology Boost with Current Sink Channels (#) 4 Vin (Min) (V) 4.5 Vin (Max) (V) 40 Vout (Min) (V) 6 Vout (Max) (V) 45 Iout (Max) (A) 0.48 Iq (Typ) (mA) 4.5 LED current per channel (mA) 0.12 Switching frequency (Max) (kHz) 2200 Operating temperature range (C) -40 to 125 Features Enable/Shutdown, Fault Detection, Fault Diagnostic, Integrated Switch, Power-Line FET, Precision Dimming Control, Spread Spectrum, Thermal Shutdown Applications Backlight Rating Automotive open-in-new 查找其它 汽车LED驱动器

封装|引脚|尺寸

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new 查找其它 汽车LED驱动器

特性

  • AEC-Q100 Qualified for automotive applications:
    • Device temperature grade 1:
      –40°C to +125°C, TA
  • Functional safety capable
    • Documentation available to aid functional safety system design
  • 3-, 4-Channel 120-mA current sinks
    • High dimming ratio of 10 000:1 at 100 Hz
    • Current matching 1% (typical)
    • LED String current up to 120 mA per channel
    • Outputs can be combined externally for higher current per string
  • Integrated boost and SEPIC converter for LED string power
    • Input voltage operating range 4.5 V to 40 V
    • Output voltage up to 45 V
    • Integrated 3.3-A Switch FET
    • Switching frequency 300 kHz to 2.2 MHz
    • Switching synchronization input
    • Spread spectrum for lower EMI
  • Fault detection and protection
    • Fault output
    • Input voltage OVP, UVLO and OCP
    • Boost block SW OVP and output OVP
    • LED open and short fault detection
    • Power-Line FET control for battery bus protection
    • Automatic LED current reduction with external temperature sensor
    • Thermal shutdown

All trademarks are the property of their respective owners.

open-in-new 查找其它 汽车LED驱动器

描述

The LP8867-Q1, LP8869-Q1 is an automotive highly-integrated, low-EMI, easy-to-use LED driver with DC-DC converter. The DC-DC converter supports both boost and SEPIC mode operation. The device has four or three high-precision current sinks that can be combined for higher current capability.

The DC-DC converter has adaptive output voltage control based on the LED forward voltages. This feature minimizes the power consumption by adjusting the voltage to the lowest sufficient level in all conditions. For EMI reduction DC-DC supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP886x-Q1 to avoid disturbance for sensitive frequency band.

The input voltage range for the LP886x-Q1 is from 4.5 V to 40 V to support automotive start-stop and load dump condition. The LP886x-Q1 integrates extensive fault detection features.

open-in-new 查找其它 汽车LED驱动器
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技术文档

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类型 标题 下载最新的英文版本 发布
应用手册 LP886x-Q1 Functional Safety FIT Rate and Failure Mode Distribution 2020年 2月 14日
应用手册 Some Guidelines and Tips for LED Driver Application 2019年 8月 14日
用户指南 LP8867-Q1 4-Channel LED Driver for Automotive Lighting Evaluation Module 2018年 12月 9日
技术文章 Here's how body electronics and lighting technology are changing the driving experience 2016年 9月 26日
技术文章 LED brightness adjustment: high-frequency PWM dimming 2016年 8月 26日
技术文章 Take better selfies with innovative LED flashes 2014年 11月 18日
技术文章 Solving the automotive EMI issues in new cars with all the screens 2014年 9月 10日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
document-generic 用户指南
$79.00
说明
LP8867Q1EVM 帮助设计人员评估 LP8867/9-Q1 器件(用于汽车照明的高性能 LED 驱动器)的特性、操作和使用情况。LP8867/9-Q1 器件是一款易于使用的 LED 驱动器,具有集成式直流/直流转换器。该器件还具有四个/三个可由 PWM 输入信号控制的 120mA 高精度灌电流,并集成了丰富的故障检测功能。
特性
  • 输入电压为 4.5V 至 40V
  • 输出电压最高达 45V
  • 输出电流 120mA/通道
  • 开关频率为 300 kHz 至 2.2MHz
  • 通过 NTC 传感器实现 LED 电流调光

CAD/CAE 符号

封装 引脚 下载
HTSSOP (PWP) 20 视图选项

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