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A3918:低电压直流电动机驱动器

A3918 ECAD Model
A3918 数据表
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Description

Top Features

通过脉宽调制 (PWM) 控制低电压直流电动机，A3918 能够提供 1.5  安培的输出电流，工作电压为 2.5 至 9 V。

A3918 内置固定关断时间 PWM 计时器，根据对电流感应电阻的选择，设置峰值电流。过流输出标记用于在电动机绕组内的电流达到峰值电流时通知用户，该电流可由感应电阻感测。输出故障不会影响驱动器运行。

A3918 采用 16-触点，3 mm × 3 mm，0.75 mm 标称总高度 QFN 封装，裸露焊盘以增强散热。其封装为无铅 (Pb) 产品，且采用 100% 雾锡电镀引脚框。

可用于以下应用：

  • 数码照相机 (DSC)
  • 手机照相机
  • USB 供电设备
  • 电池供电设备
  • 在 2.5 至 9 V 之间工作
  • 内部 PWM 电流控制
  • 同步整流，降低功耗
  • 峰值电流输出标记
  • 欠压锁定
  • 低 RDS(开) 输出
  • 小型封装
  • 针对直流电动机的制动模式
  • 睡眠功能
  • 交叉电流保护
  • 过热关机功能
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Part Number Specifications and Availability

Documentation and Resources

Documentation

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Documents Found: 32
Document Type Document Name
Application Note
January 31, 2023
PCB Ground Plane Optimization for Coreless Current Sensor Applications