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A4915：三相 MOSFET 驱动器

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Description

Top Features

A4915 可实现三相无刷直流电电动机的脉宽调制 （PWM） 电流控制。A4915 能够为六个全 N 通道功率 MOSFET 提供大电流门极驱动。内部电荷泵确保对低至 7 V 电源的门极驱动，并且提供低至 5 V 的有限门极驱动。自举电容器用于生成比高端 MOSFET 电源电压更高的电源电压，这是 N 通道 MOSFET 所需的电源电压。

内部同步整流控制电路可降低脉宽调制 (PWM) 操作时外部 MOSFET 的功耗。内部电路保护包括锁存过热关机、无感时间保护和欠压锁定。不需要特别的加电排序。

A4915 采用带外露隔热盘的 28 引脚 TSSOP 封装（后缀 LP）以及外露隔热盘的 28 触点 5 × 5 mm QFN 封装（后缀 ET）。这些均为无铅 (Pb) 封装，且引脚框采用 100% 雾锡电镀。

  • 5 至 50 V 电源电压
  • 具有故障输出的锁存 TSD
  • 提供六个 N 通道大电流 MOSFET
  • 内部控制的同步整流
  • 速度电压输入可实现对全桥的内部 PWM 占空比控制
  • 中心对齐的 PWM
  • 内部 UVLO 和交叉电流保护
  • 霍尔开关输入
  • 可调无感时间保护
  • 面向电池供电应用的低功耗休眠模式
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Part Number Specifications and Availability

A4915 Product Overview

The Allegro A4915 Three-Phase MOSFET Driver’s innovative speed input and fully integrated block commutation delivers simple speed control of a BLDC motor with a single analog voltage. Watch video to learn more. 

A4915 Product Overview

The Allegro A4915 Three-Phase MOSFET Driver’s innovative speed input and fully integrated block commutation delivers simple speed control of a BLDC motor with a single analog voltage. Watch video to learn more. 

Documentation and Resources

Documentation

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Documents Found: 32
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Technical Article
September 08, 2022
Hall-Based BLDC Gate Drive Saves Microprocessor IO and Provides Zero Speed Torque