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A6263：保护型 LED 阵列驱动器

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A6263 ECAD Model
A6263 数据表
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Description

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A6263 是一款线性、可编程电流调节器，通过四路输出提供电流，每路均可提供最高 100 mA，以驱动高亮 LED 阵列。输出可根据需要并联或闲置。每路输出的经调节的 LED 电流（精确到 5%）由单个参考电阻设置。不使用镇流电阻，每个串的电流匹配优于 10%。使用恒流驱动 LED，确保安全运行，并提供最大的可能照明输出。

IC 针对以下常见故障提供保护：

  • LED 串对地短路
  • 单个和多个 LED 短路
  • LED 串开路
  • IC引脚开路/短路
  • 过温

如果一个 LED 串开路或接地短路，则禁用受影响的串，其他 LED 串继续工作。

产品含温度监视器，用于在芯片温度超过热阈值的情况下减少 LED 驱动电流。必要时，可调整或禁用该热降额阈值。

该器件采用带外露隔热盘的 8 引脚 SOIC（封装 LJ）封装，以增强散热。该封装为无铅 (Pb) 封装，采用 100% 雾锡电镀引脚框。

应用

  • 汽车内部和外部照明
  • 获得 AEC-Q100 认证
  • LED 总驱动电流高达 400 mA
  • 最多 4个串，均分电流 100mA。
  • 6 至 50 伏特宽输入电压范围，可满足启动/关闭、冷车启动和负载突降要求
  • 低压降电压
  • 单个参考电阻器可设置 LED 电流大小
  • LED 串对地短路保护
  • 带有可选热降额功能的过温保护
  • 汽车应用温度范围
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Technical Article
May 09, 2023
Overcoming Long Term Reliability Challenges in Two-Wheeler Rear Combination Lamps