[原创] TI DRV8881步进和有刷DC马达驱动解决方案

TI公司的DRV8881是工业应用的步进和有刷DC马达驱动器,输出级包含两个N沟功率MOSFET H桥驱动器,峰值驱动电流2.5A,工作电压6.5V-45V,具有多种保护功能,主要用在ATM机,视频安全照相机,工厂自动化,机器人,多功能打印机,舞台照明设备等.本文介绍了DRV8881主要特性,框图,步进和有刷DC马达应用框图,以及DRV8881P马达驱动评估板特性,电路图和硬件设计文件.

The DRV8881 is a bipolar stepper or brushed-DC motor driver for industrial applications. The device output stage consists of two N-channel power MOSFET H-bridge drivers. The DRV8881 is capable of driving up to 2.5-A peak current or 1.4-Arms current per H-bridge (with proper PCB ground plane for thermal dissipation and at 24 V and TA = 25℃).

AutoTune™ automatically tunes motors for optimal current regulation performance and compensates for motor variation and aging effects. AutoTune is available on the DRV8881E. Additionally, slow, fast, and mixed decay modes are available.

The PH/EN (DRV8881E) or PWM (DRV8881P) pins provide a simple control interface. An internal sense amplifier allows for adjustable current control. A low-power sleep mode is provided for very-low quiescent current standby using a dedicated nSLEEP pin.
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