• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The DRV8821 provides a dual microstepping-capable stepper motor controller/driver solution for printers, scanners, and other office automation equipment applications.

Two independent stepper motor driver circuits include four H-bridge drivers and microstepping-capable indexer logic. Each of the motor driver blocks employ N-channel power MOSFETs configured as an H-bridge 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, and the selection of slow or mixed decay modes.

Internal shutdown functions are provided for over current protection, short circuit protection, under voltage lockout and overtemperature.

特性

• Dual PWM microstepping motor driver
  • Built-In Microstepping Indexers
  • Up to 1.5-A Current Per Winding
  • Three-Bit Winding Current Control Allows up to Eight Current Levels
  • Low MOSFET On-Resistance
  • Selectable Slow or Mixed Decay Modes
• 8-V to 32-V Operating Supply Voltage Range
• Internal Charge Pump for Gate Drive
• Built-in 3.3-V Reference
• Simple Step/Direction Interface
• Fully Protected Against Undervoltage, Overtemperature, and Overcurrent
• Thermally Enhanced Surface Mount Package
• APPLICATIONS
  • Printers
  • Scanners
  • Office Automation Machines
  • Gaming Machines
  • Factory Automation
  • Robotics

PowerPad Is a trademark of Texas Instruments.