TI DRV8818步进马达驱动解决方案
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
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