DRV8847 2A Dual H-Bridge Motor Driver | TI.com

DRV8847 (ACTIVE)

2A Dual H-Bridge Motor Driver

2A Dual H-Bridge Motor Driver - DRV8847
Datasheet
 

Description

The DRV8847 device is a dual H-bridge motor driver for industrial applications, home appliances, ePOS printers, and other mechatronic applications. This device can be used for driving two DC motors, a bipolar stepper motor, or other loads such as relays. A simple PWM interface allows easy interface with the controller. The DRV8847 device operates off a single power supply and supports a wide input supply range from 2.7 to 18 V.

The output stage of the driver consists of N-channel power MOSFETs configured as two full H-bridges to drive motor windings or four independent half bridges (in independent bridge interface). A fixed off time controls the peak current in the bridge which can drive a 1-A load (2-A in parallel mode with proper heat sinking, at 25°C TA).

A low-power sleep mode is provided to achieve a low quiescent current draw by shutting down much of the internal circuitry. Additionally, a torque scalar is provided which dynamically scales the output current through a digital input pin. This feature lets the controller decrease the current required for lower power consumption.

Internal protection functions are provided for undervoltage-lockout, overcurrent protection on each FET, short circuit protection, open-load detection, and overtemperature. Fault conditions are indicated by on the nFAULT pin. The I2C device variant (DRV8847S) has detailed diagnostics.

Features

  • Dual H-Bridge Motor Driver
    • Single or Dual Brushed DC Motors
    • One Bipolar Stepper Motor
    • Solenoid Loads
  • 2.7-V to 18-V Operating Voltage Range
  • High Output Current per H-bridge
    • 1-A RMS Driver Current at TA = 25°C
    • 2-A RMS Driver Current in Parallel Mode at TA = 25°C
  • Low On-State Resistance
    • 1000 mΩ RDS(ON) (HS + LS) at TA = 25°C
  • Multiple Control Interface Options
    • 4-Pin Interface
    • 2-Pin Interface
    • Parallel Bridge Interface
    • Independent Bridge Interface
  • Current Regulation With 20-µs Fixed Off Time
  • Torque Scalar for Scaling Output Current to 50%
  • Supports 1.8-V, 3.3-V, 5-V Logic Inputs
  • Low-Power Sleep Mode
    • 1.7-µA Sleep Mode Supply Current at VVM = 12-V, TA = 25°C
  • I2C Device Variant Available (DRV8847S)
    • Detailed Diagnostics on I2C Registers
    • Multi-Slave Operation Support
    • Supports Standard and Fast I2C Mode
  • Small Packages and Footprints
    • 16 Pin TSSOP (No Thermal Pad)
    • 16 Pin HTSSOP PowerPAD™ Package
    • 16 Pin WQFN Thermal Package
  • Built-In Protection Features
    • VM Undervoltage Lockout
    • Overcurrent Protection
    • Open Load Detection
    • Thermal Shutdown
    • Fault Condition Indication Pin (nFAULT)

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Parametrics

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Part number Order Vs (Min) (V) Vs (Max) (V) Control I/F Micro-stepping levels Peak output current (A) RDS(ON) (HS + LS) (mOhms) Number of half bridges Operating temperature range (C) Approx. price (US$) Rating Package Group
DRV8847 Order now 2.7     18     PWM
PH/EN
Independent 1/2-H PWM    
  2     1000     4     -40 to 125     0.80 | 1ku     Catalog     HTSSOP | 16
TSSOP | 16
WQFN | 16    
DRV8833 Order now 2.7     10.8     PWM       2     360       -40 to 85     0.90 | 1ku     Catalog     HTSSOP | 16
QFN | 16
TSSOP | 16    
DRV8833C Order now 2.7     10.8     PWM       1     1735       -40 to 85     0.75 | 1ku     Catalog     HTSSOP | 16
WQFN | 16    
DRV8834 Order now 2.5     10.8     STEP/DIR
PH/EN    
32     2.2     305       -40 to 85     1.15 | 1ku     Catalog     HTSSOP | 24
VQFN | 24    
DRV8848 Order now 4     18     PWM       2     900       -40 to 85     0.94 | 1ku     Catalog     HTSSOP | 16