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A3967：带转换器的微步驱动器

A3967 ECAD Model
A3967 数据表
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Description

Top Features

A3967SLB 是完整的微步电动机驱动器，具有内置转换器。 该驱动器可在全步进、半步进、四分之一及八分之一步进模式中操作双极步进电动机,输出驱动能力为 30 伏特及 ±750 毫安。 A3967SLB 包括一个固定关断时间电流稳流器，该稳流器可在慢、快或混合衰减模式下操作。此电流衰减控制方案能减少可闻电动机噪音、增加步进精确度并减少功率耗散。

转换器是 A3967SLB 易于实施的关键。 通过简单地在“步进”输入中输入一个脉冲，电动机会产生步进（全步进、半步进、四分之一或八分之一步进，根据两个逻辑输入的情况而定）。无须进行相位顺序表、高频率控制线路或复杂的界面编程。 A3967SLB 界面非常适合复杂的微处理器不可用或过载的应用。

内部电路保护包括带时延的过热关机、瞬态抑制二极管及交叉电流保护。不需要特别的加电排序。

A3967SLB 采用带蝙蝠式铜片的 24 引脚 SOIC 封装。 铜片处于接地电位，且不需要电气绝缘。 另有无铅（100% 雾锡电镀引脚框）版本可供选择。

  • ±750 毫安，30 伏特输出额定值
  • Satlington® 灌电流驱动器
  • 自动电流衰减模式探测/选择
  • 3.0 伏特至 5.5 伏特逻辑电源电压范围
  • 混合、快和慢电流衰减模式
  • 内部 UVLO 和过热关机电路
  • 交叉电流保护
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Part Number Specifications and Availability

Documentation and Resources

Third Party Design Tools

Mikroe Demoboards


PWR Meter 3 Demo Board

Stepper click is a complete solution for driving bipolar stepper motors with full/half and micro-steps. It features the A3967 IC from Allegro Microsystems with proprietary Satlington™ sink drivers on its outputs, which ensure high efficiency and reliable operation of the internal H-Bridges.


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