Texas Instruments 德州仪器 DRV8870 3.6A 刷式直流电机驱动器

德州仪器 DRV8870 3.6A 刷式直流电机驱动器是一款刷式直流电机驱动器,适用于打印机、电器、工业设备以及其他小型机器。两个逻辑输入控制 H 桥驱动器,该驱动器由四个 N 沟道金属氧化物半导体场效应晶体管(MOSFET)组成,能够以高达 3.6A 的峰值电流双向控制电机。利用电流衰减模式,可通过对输入进行脉宽调制(PWM)来控制电机转速。如果将两个输入均置为低电平,则电机驱动器将进入低功耗休眠模式。DRV8872 具有集成电流调节功能,该功能基于模拟输入 VREF 以及 ISEN 引脚的电压(与流经外部感测电阻的电机电流成正比)。该器件能够将电流限制在某一已知水平,这可显著降低系统功耗要求,并且无需大容量电容来维持稳定电压,尤其是在电机启动和停转时。

The DRV8870 drivers have the ability to limit the current to a known level and can significantly reduce the system power requirements and bulk capacitance. This is required to maintain a stable voltage, especially for motor startup and stall conditions. applications include printers, appliances, industrial equipment, and other mechatronic applications.

特性

  • H-bridge motor driver:
    • Drives one DC motor, one winding of a stepper motor, or other loads
  • Wide 6.5V to 45V operating voltage
  • 565mΩ typical RDS(on) (HS + LS)
  • 3.6A peak current drive
  • PWM control interface
  • Integrated current regulation
  • Low-power sleep mode
  • Small package and footprint:
    • 8-Pin HSOP with PowerPAD
    • 4.9mm x 6.0mm
  • Integrated protection features:
    • VM Undervoltage Lockout (UVLO)
    • Overcurrent Protection (OCP)
    • Thermal Shutdown (TSD)
    • Automatic fault recovery

应用

  • Printers
  • Appliances
  • Industrial equipment
  • Other mechatronic applications
发布日期: 2015-11-10 | 更新日期: 2022-03-11