Motor Drivers, Stepper | LB1946

PWM 电流控制步进电机驱动器

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实施 PWM 电流控制双极驱动，且具有固定关断时间的步进电机驱动集成电路。 此集成电路具有使用固定 VREF 电压的 15 个电流设置等级，支持 1-2 相励磁到 4W1-2 相励磁驱动的微步进驱动。 此器件适用于驱动打印机中墨盒驱动和进纸等装置中使用的步进电机。

  • Carriage drive and paper feed in printers

  • PWM current control with a fixed off time
  • Logic input serial-parallel converter (allows 1-2, W1-2, 2W1-2 and 4W1-2 phase excitation drive)
  • Built-in upper and lower side output diode
  • Current attenuation switching function (with slow decay, fast decay and mixed decay modes)
  • Simultaneous on state prevention function (through current prevention)
  • Noise canceller function
  • Thermal shutdown circuit
  • Shutoff on low logic system voltage circuit
  • Low-power mode control pin

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