DRV8886ATEVM: 2A, 8 ~ 37V, Stepper Motor Driver with Integrated Current Sense

The DRV8886AT customer EVM is a platform revolving around the DRV8886AT, a medium-voltage dual H-bridge driver and highly-configurable power stage. This device has been optimized to drive a single bipolar stepper with up to 16 degrees of internally generated microstepping. The EVM houses an MSP430™ microcontroller and an USB interface chip. The USB chip allows for serial communications from a PC computer where a Windows® application is used to schedule serial commands. These commands can be used to control each of the device signals, and drive the steppermotor by issuing the step commands at the desired rate.

The microcontroller firmware operates using an internal index mode.

Features:

• 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

• Smart tune adaptive decay technology, slow, and mixed decay options

• 8 to 37-V Operating supply voltage range

• Low RDS(ON): 550 mΩ HS + LS at 24 V, 25°C

• High current capacity

  - 3-A Peak per bridge

  - 2-A Full-scale per bridge

  - 1.4-A rms per bridge

• Dynamic and fixed off-time PWM current regulation

• Simple STEP/DIR interface

• Low-current sleep mode (20 μA)

• VM undervoltage lockout (UVLO)

• Charge pump undervoltage (CPUV)

• Overcurrent protection (OCP)

• Thermal shutdown (TSD)

• Fault condition indication pin (nFAULT)