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A4955:全桥式 PWM 门驱动器

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A4955 ECAD Model
A4955 数据表
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Description

Top Features

A4955 设计用于直流电动机的脉宽调制 (PWM) 控制，可以以 50 V 电压运行，并为所有 n 通道外部 MOSFET 桥提供门驱动器。

该产品可提供输入端子，通过外部施加的 PWM 控制信号控制直流电动机的速度与方向。采用内部同步整流控制电路降低脉宽调制 (PWM) 操作时的功率消耗。

内部电流保护包括 VDS 保护、滞后过热关机、VBB 欠压监视及交叉电流保护。

A4955 器件采用低厚度 4x4 mm 20 触点 QFN 封装（后缀“ES”）以及 20 引脚 eTSSOP （后缀“LP”），均带有外露隔热盘。

  • 标准 IN1/IN2 控制逻辑
  • 过流指示
  • 可调节关断时间和消隐时间
  • 可调电流限制
  • 可调门驱动器
  • 同步整流
  • 内部 UVLO
  • 交叉电流保护
  • MOSFET VDS 保护
  • 电压输出与负载电流成比例
  • A4955K 符合 AEC-Q100 Grade 1 标准
  • 商用温度等级 (A4955G:–40°C 至 105°C)
  • 汽车温度等级 (A4955K:-40°C 至 125°C)
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Documentation

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Documents Found: 32
Document Type Document Name
Guide
A4955 Evaluation Board User Guide