Stepper motor driver with 1/16 microstepping and integrated current sensing

03-10-2016 | Texas Instruments | Power

Texas Instruments’ DRV8884 has two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sense. This stepper motor driver for industrial equipment applications. The DRV8884 is capable of driving up to 1.0A full scale or 0.7A RMS output current (depending on proper PCB ground plane for thermal dissipation and at 24V and TA = 25C). It has integrated current sense functionality eliminates the need for two external sense resistors. Internal protection functions are provided for undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by an nFAULT pin. 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.