TI DRV8818步进马达驱动解决方案
发布时间:2012-4-24 20:13
发布者:1770309616
TI公司的DRV8818是用于打印机,扫描仪和其它自动化设备的步进马达驱动器,集成了两个H桥驱动器和用来控制步进马达的微步距分度器逻辑.微步距马达驱动器采用PWM,可提供1/8步操作,每个绕组的电流高达2.5A,主要用在打印机,纺织机械,定位/跟踪,工厂自动化和机器人.本文介绍了DRV8818主要特性, 方框图和马达驱动电路以及评估模块DRV8818EVM方框图,电路图和材料清单. The DRV8818 provides an integrated stepper motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers, as well as microstepping indexer logic to control a stepper motor. The output driver block for each consists of N-channel power MOSFETs configured as full H-bridges to drive the motor windings. A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step, half-step, quarter-step, or eighth-step modes. Decay mode and PWM off time are programmable. Internal shutdown functions are provided for over current protection, short circuit protection, under-voltage lockout and overtemperature. DRV8818主要特性: Pulse Width Modulation (PWM) Microstepping Motor Driver Built-In Microstepping Indexer Up to 2.5-A Current Per Winding Microstepping Indexer Provides up to 1/8-Step Operation Low 0.37-Ω (HS + LS) MOSFET On-Resistance (at 25°) Programmable Mixed Decay, Blanking, and Off Time Pin-Compatible Upgrade to DRV8811 With Lower Rds(on) Thermally Enhanced Surface Mount Package DRV8818应用: • Printers • Textile Machinery • Positioning/Tracking • Factory Automation • Robotics 图1.DRV8818方框图 图2.DRV8818马达驱动电路 评估模块DRV8818EVM The DRV8818EVM is a complete solution for evaluating the DRV8818 micro-stepping, bipolar stepper driver. It includes a USB link to provide easy control from a personal computer (PC), a MSP430 microcontroller that interprets serial commands from the PC and generates control signals to the driver device, and the DRV8818 device with access to all signals for a complete evaluation. 图3.评估模块DRV8818EVM外形图 图4.评估模块DRV8818EVM方框图 图5.评估模块DRV8818EVM电路图(1) 图6.评估模块DRV8818EVM电路图(2) 评估模块DRV8818EVM材料清单: 详情请见: 来源:网络 |
网友评论