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 SPI 接口)

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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 SPI 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
    • SPI Interface with STEP/DIR pins
    • Up to 1/256 Microstepping Indexer
  • Integrated Current Sense Functionality
    • No Sense Resistors Required
    • ±4% Full-Scale Current Accuracy
  • Smart tune, slow, and mixed decay options
  • 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
  • TRQ_DAC bits to scale full-scale current
  • Configurable Off-Time PWM Chopping
    • 7-µs, 16-µs, 24-µs, or 32-µs
  • Supports 1.8 V, 3.3 V, 5.0 V Logic Inputs
  • Daisy Chain support with SPI
  • 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)
    • Overtemperature Warning (OTW)
    • Thermal Shutdown (OTSD)
    • Fault Condition Output (nFAULT)
open-in-new 查找其它 步进电机驱动器

描述

The DRV8434S 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 DRV8434S is capable of driving up to 2.5-A full-scale output current (dependent on PCB design).

The DRV8434S 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 selectable between smart tune, slow and mixed decay options. Smart tune automatically adjusts for optimal current regulation and reduces audible noise from the motor.

A simple SPI interface with STEP/DIR pins 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. With advanced stall detection algorithm, designers can detect if the motor stopped and take action as needed. The device also includes an integrated torque DAC which allows scaling the output current through SPI without needing to scale the VREF reference. Other protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, open load, and overtemperature. Fault conditions are indicated by the nFAULT pin.

A low-power sleep mode is provided for very low standby current using an nSLEEP pin. The device features full duplex, 4-wire synchronous SPI communication, with daisy chain support for up to 63 devices connected in series, for configurability and detailed fault reporting.

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 DRV8434S Stepper Driver With Integrated Current Sense, 1/256 Microstepping, SPI Interface, Smart Tune Technology and Stall Detection 数据表 2020年 12月 7日
证书 DRV8434SEVM EU RoHS Declaration of Conformity (DoC) 2020年 12月 7日
用户指南 DRV8434SEVM GUI User's Guide 2020年 11月 25日
用户指南 DRV8434SEVM User's Guide 2020年 11月 25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

DRV8434S 评估模块 (EVM) 可轻松评估 DRV8434S 器件。

DRV8434S 是一款完全集成的步进电机驱动器,可支持高达 2.5A 的满量程电流,配备内部微步进索引器、智能调谐衰减技术、先进的失速检测算法和集成电流感应功能。DRV8434 器件可由 4.5V 至 48V 的电源电压供电。借助简单的 STEP/DIR 控制接口和支持菊花链的 SPI 通信,外部控制器可管理输出。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。

更多有关该评估模块的信息,请参阅《DRV8434SEVM 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 输入接口和支持菊花链的 SPI 通信
  • 集成式电流感应和微步进分度器
  • 智能调优技术
  • 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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