A8501GLPTR-T

• Product Introduction

The A8501 is a multiplex WLED/RGB driver designed for backlit mid-size displays. The A8501 includes a boost converter and four incoming current sources. It can operate from a single supply of 8 to 21 V and withstand up to 40 V.

A boost converter is a constant frequency current-mode converter. The operating frequency can be set to 2 MHz to avoid interference from the AM band. The integrated boost DMOS switch is rated at 40 V and 3.6 A.

PWM light and dark control supports LED current control at a 1000:1 ratio. Other 4:1 light and dark control sections are obtained by using DIM pins.　

The A8501 provides short-circuit protection for the output terminals with an integrated output shut-off switch. An optional external thermistor can be used to limit the LED current based on panel temperature.

The unit is available in a surface-mount, 28-pin TSSOP package (suffix LP) with exposed thermal pads for enhanced heat dissipation. The packaging is lead-free and 100% matte tin plated.

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• 导航系统
• 汽车信息娱乐系统
• • 严格电流匹配的 LED 字符串与精确度之间的有功电流共享
  • 可驱动多达 9 路串行、 4 组并联串、 36 个 LED 最大值 (Vf = 3.5 V, If = 100 mA)
  • 带集成 40 V DMOS 的升压转换器
  • LED 灌电流额定值为100 mA
  • 典型 LED 匹配错误
  • 带 LED 工作循环控制的 PWM 光暗控制
  • 4000:1 光暗范围
  • 600 kHz 至 2.2 MHz 开关频率
  • 开式 LED 断开
  • LED 短路保护
  • 单电源的内部偏压电源
  • 外部热敏电阻器感应 LED 温度限制
  • 升压电流限制、输出端路限制、过温保护 （OTP）、软启动
  • 输出过压保护
  • 开启肖特基势垒二极管及 OVP 电阻保护
  • 真输出断开
  • 欠压及过压保护输入 （UVLO 及 OVP）