TI DRV8885 1．5A微步距步进马达驱动方案
TI公司的DRV8885是集成了电流检测的具有1/16微步距的1.5A步进马达驱动器,包括两个N沟MOSFET H桥驱动器,微步距分度器和电流检测,满刻度电流精度±6.25%,工作电压8.0V-37V,主要用在多功能打印机和扫描仪,激光打印机,3D打印机,ATM,视频安全照相机,办公自动化设备,工厂自动化和机器人.本文介绍了DRV8885主要特性,功能框图,应用框图,以及评估板DRV8885 EVM框图,电路图,材料清单和PCB设计图.
The DRV8885 is a stepper motor driver for industrial equipment applications. The device has two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sense. The DRV8885 is capable of driving up to 1.5 A full scale or 1.0 Arms output current (depending on proper PCB ground plane for thermal dissipation and at 24 V and TA = 25℃).
The DRV8885 integrated current sense functionality eliminates the need for two external sense resistors.
The STEP/DIR pins provide a simple control interface. The device can be configured in full-step up to 1/16 step modes. A low-power sleep mode is provided for very-low quiescent current standby using a dedicated nSLEEP pin.
Internal protection functions are provided for undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by an nFAULT pin.
DRV8885主要特性:
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