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1.4A Bipolar Stepper Motor Driver with On-Chip 1/32 Microstepping Indexer (Step/Dir Ctrl)


Package | PIN: RGE | 24
Temp: I (-40 to 85)
Carrier: Cut Tape
Qty Price
1-9 $2.40
10-24 $2.16
25-99 $2.01
100-249 $1.76
250-499 $1.65
500-749 $1.40
750-999 $1.18
1000+ $1.13


  • PWM Microstepping Motor Driver
    • Built-In Microstepping Indexer
    • Up to 1/32 Microstepping
    • Step/Direction Control
  • Multiple Decay Modes
    • AutoTune™ Technology
    • Mixed Decay
    • SlowDecay
    • Fast Decay
  • Configurable Off-Time PWM Chopping
    • 10-, 20-, or 30-µs Off-Time
  • Adaptive Blanking Time for Smooth Stepping
  • 4- to 18-V Operating Supply Voltage Range
  • 1.4-A (Full Scale (Max Drive) Current per H-Bridge (at 25°C)
  • Low-Current Sleep Mode
  • 3-Bit Torque DAC to Scale Motor Current
  • Thermally Enhanced Surface Mount Package
  • Protection Features
    • VM Undervoltage Lockout (UVLO)
    • Overcurrent Protection(OCP)
    • Thermal Shutdown (TSD)
    • Fault Condition IndicationPin (nFAULT)

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Texas Instruments  DRV8846RGER

The DRV8846 provides a highly-integrated stepper motor driver for cameras, printers,projectors, and other automated equipment applications. The device has two H-bridges and amicrostepping indexer and is intended to drive a bipolar stepper motor. The output block of eachH-bridge driver consists of N-channel and P-channel power MOSFETs configured as full H-bridges todrive the motor windings. The DRV8846 is capable of driving up to 1.4-A full-scale output current(with proper heatsinking and TA = 25°C).

A simple STEP/DIR interface allows easy interfacing to controller circuits. Pins allowconfiguration of the motor in full-step up to 1/32-step modes. Decay mode is configurable so thatAutoTune, slow decay, fast decay, and mixed decay can be used. The PWM current chopping off-timecan also be selected. A low-power sleep mode is provided which shuts down internal circuitry toachieve very-low quiescent current draw. This sleep mode can be set using a dedicated nSLEEPpin.

Internal protection functions are provided for UVLO, overcurrent protection, shortcircuit protection, and overtemperature. Fault conditions are indicated via a nFAULT pin.