DRV8886AT 2A Stepper Motor Driver With Integrated Current Sense and smart tuning technology | TI.com

DRV8886AT (ACTIVE) 2A Stepper Motor Driver With Integrated Current Sense and smart tuning technology

 

Description

The DRV8886AT is a stepper motor driver for industrial and consumer end equipment applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8886AT is capable of driving up to 2-A full scale or 1.4-A rms output current (24-V and TA = 25°C, dependent on PCB design).

The DRV8886AT uses an internal current sense architecture to eliminate the need for two external power sense resistors saving PCB area and system cost. The DRV8886AT uses an internal PWM current regulation scheme adjustable between AutoTune adaptive decay technology, slow, and mixed decay options. AutoTune adaptive decay technology automatically adjusts for optimal current regulation performance and compensates for motor variation and aging effects.

A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor. The device can be configured in different step modes ranging from full-step to 1/16 microstepping. A low-power sleep mode is provided for very low standby quiescent standby current using a dedicated nSLEEP pin.

Device protection features are provided for supply undervoltage, charge pump faults, overcurrent, short circuits, and overtemperature. Fault conditions are indicated by the nFAULT pin.

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
  • AutoTune™ 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)
  • 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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Parametrics

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Part number Order Number of full bridges Vs (Min) (V) Vs (Max) (V) Full-scale current (A) Peak output current (A) RDS(ON) (HS + LS) (mOhms) Control mode Control interface Features Package size: mm2:W x L (PKG) Approx. price (US$) Rating
DRV8886AT Order now 2     8     37     2     3     550     STEP/DIR     Hardware (GPIO)     Smart Tune
Integrated Current Sensing    
24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)
28WQFN: 19 mm2: 3.5 x 5.5 (WQFN | 28)    
1.54 | 1ku     Catalog