具有集成式电流感应和失速检测功能的 48V、2.5A 双极步进电机驱动器(使用 GPIO 引脚)

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产品详细信息

参数

Number of full bridges 2 Vs (Min) (V) 4.5 Vs ABS (Max) (V) 50 Full-scale current (A) 2.5 Peak output current (A) 4 RDS(ON) (HS + LS) (mOhms) 330 Sleep current (uA) 2 Control mode STEP/DIR Control interface Hardware (GPIO) Micro-stepping levels 256 Features Current Regulation, Integrated Current Sensing, Smart Tune, Stall Detection Rating Catalog Operating temperature range (C) -40 to 125 open-in-new 查找其它 步进电机驱动器

封装|引脚|尺寸

HTSSOP (PWP) 28 43 mm² 9.7 x 4.4 VQFN (RGE) 24 16 mm² 4 x 4 open-in-new 查找其它 步进电机驱动器

特性

  • PWM Microstepping Stepper Motor Driver
    • Simple STEP/DIR Interface
    • Up to 1/256 Microstepping Indexer
  • Integrated Current Sense Functionality
    • No Sense Resistors Required
    • ±4% Full-Scale Current Accuracy
  • Smart tune ripple control decay
  • Stall Detection using GPIO pins

  • 4.5 to 48-V Operating Supply Voltage Range
  • Low RDS(ON): 330 mΩ HS + LS at 24 V, 25°C
  • High Current Capacity: 2.5 A Full-Scale, 1.8 A rms
  • Supports 1.8 V, 3.3 V, 5.0 V Logic Inputs
  • Low-Current Sleep Mode (2 µA)
  • Spread spectrum clocking for low EMI
  • Small Package and Footprint

  • Protection Features
    • VM Undervoltage Lockout (UVLO)
    • Charge Pump Undervoltage (CPUV)
    • Overcurrent Protection (OCP)
    • Sensorless stall detection
    • Open Load Detection (OL)
    • Thermal Shutdown (OTSD)
    • Fault Condition Output (nFAULT)
open-in-new 查找其它 步进电机驱动器

描述

The DRV8434A is a stepper motor driver for industrial and consumer applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8434A is capable of driving up to 2.5 A full-scale output current (dependent on PCB thermal design).

The DRV8434A uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune ripple control decay. Smart tune automatically adjusts for optimal current regulation, compensates for motor variation and aging effects and reduces audible noise from the motor.

A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin.

The DRV8434A features advanced stall detection algorithm configurable by two digital IO and one analog IO pins, and does not require an SPI interface to detect stall. By detecting motor stall, system designers can identify if the motor was obstructed and take action as needed which can improve efficiency, prevent damage and reduce audible noise. Other protection features include supply undervoltage, charge pump faults, overcurrent, short circuits, open load, and overtemperature. Fault conditions are indicated by the nFAULT pin.

open-in-new 查找其它 步进电机驱动器
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技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 DRV8434A Stepper Driver With Integrated Current Sense, 1/256 Microstepping, smart tune and Stall Detection using GPIO pins 数据表 2020年 12月 3日
证书 DRV8434AEVM EU RoHS Declaration of Conformity (DoC) 2020年 12月 3日
技术文章 Drive unipolar stepper motors as bipolar stepper motors with a simple wiring reconfiguration 2020年 4月 9日
技术文章 How stepper motors improve noise and efficiency in automotive system design 2019年 11月 19日
技术文章 Getting smart about tuning your stepper motor 2018年 8月 23日
技术文章 The story of motor-drive integration 2017年 1月 9日
应用手册 所选封装材料的热学和电学性质 2008年 10月 16日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
document-generic 用户指南
75
说明

DRV8434A 评估模块 (EVM) 可轻松评估 DRV8434A 器件。

DRV8434A 器件是用于双极步进电机的集成电机驱动器解决方案。该器件集成了两个 N 沟道功率 MOSFET H 桥、集成电流感应和调节电路、模拟失速检测功能以及一个微步进分度器。DRV8434A 器件可由 4.5V 至 48V 的电源供电。简单的 STEP/DIR 控制接口可使外部控制器管理输出。衰减模式可以选择为慢速、混合衰减、智能调优纹波控制或智能调优动态衰减电流调节方案。

有关该评估模块的更多信息,请参阅《DRV8434AEVM 用户指南》。

特性
  • 4.5V 至 48V 工作电压范围
  • 高达 4A 的峰值电流
  • 简单的 STEP/DIR 输入接口
  • 集成式电流感应和微步进分度器
  • 智能调优技术
  • 模拟失速检测

CAD/CAE 符号

封装 引脚 下载
HTSSOP (PWP) 28 了解详情
VQFN (RGE) 24 了解详情

订购与质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/FIT 估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

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