DRV8885

• PWM microstepping stepper motor driver
  • Up to 1/16 microstepping
  • Non-circular and standard ½ step modes
• Integrated current sense functionality
  • No sense resistors required
  • ±6.25% Full-scale current accuracy
• Slow and mixed decay options
• 8.0- to 37-V Operating supply voltage range
• Low R_DS(ON): 0.86 Ω HS + LS at 24 V, 25°C
• High current capacity
  • 1.5-A Full scale per bridge
  • 1.0-A rms per bridge
• Fixed off-time PWM chopping
• Simple STEP/DIR interface
• Low-current sleep mode (20 µA)
• Small package and footprint
  • 24 HTSSOP PowerPAD™ package
  • 28 WQFN package
• Protection features
  • VM undervoltage lockout (UVLO)
  • Charge pump undervoltage (CPUV)
  • Overcurrent protection (OCP)
  • Thermal shutdown (TSD)
  • Fault condition indication pin (nFAULT)

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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 A rms output current (depending on proper PCB ground plane for thermal dissipation and at 24 V and T_A = 25°C).

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.