SLLSEK2A June   2014  – March 2017 DRV8846

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 PWM Motor Drivers
      2. 7.3.2 Micro-Stepping Indexer
      3. 7.3.3 Current Regulation
      4. 7.3.4 Decay Mode
      5. 7.3.5 Blanking Time
      6. 7.3.6 Protection Circuits
        1. 7.3.6.1 Overcurrent Protection (OCP)
        2. 7.3.6.2 Thermal Shutdown (TSD)
        3. 7.3.6.3 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Stepper Motor Speed
        2. 8.2.2.2 Current Regulation
        3. 8.2.2.3 Decay Modes
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

RGE Package
24-Pin VQFN With Exposed Thermal PAD
Top View
DRV8846 po_LLSEK2.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
ADEC 19 I Smart tune enable Logic low sets decay modes by DEC0 and DEC1 pins; logic high – smart tune operation is enabled; must be set prior to coming out of sleep; internal pulldown
AISEN 2 O Winding A sense Connect to current sense resistor for bridge A, or GND if current regulation is not required
AOUT1 1 O Winding A output
AOUT2 3
BISEN 5 O Winding B sense Connect to current sense resistor for bridge B, or GND if current regulation is not required
BOUT1 6 O Winding B output
BOUT2 4
DEC0 22 I Decay mode setting pins Sets the decay mode; see description section; tri-level pin
DEC1 24 I
DIR 13 I Direction input Logic level sets the direction of stepping; internal pulldown
GND 18, PPAD PWR Device ground Both the GND pin and device thermal pad must be connected to ground
I0 20 I Torque DAC current scalar Scales the current from 100% to 12.5% in 12.5% steps; tri-level pin
I1 21 I
MO 8 I Microstepping mode setting pins Controls step mode (full, half, up to 1/32-step) and single- or dual-edge clocking; tri-level pin
M1 9 I
NC 16 — No connect Unused pin not connected internally
nENBL 11 I Enable driver output Logic low to enable device outputs and internal indexer; logic high to disable; internal pulldown
nFAULT 7 OD Fault indication pin Pulled logic low with fault condition; open-drain output requires external pullup
nSLEEP 23 I Sleep mode input Logic high to enable device; logic low to enter low-power sleep mode; internal pulldown
STEP 12 I Step input A rising edge (or rising and falling depending on step mode) advances the indexer one step; internal pulldown
TOFF_SEL 10 I Decay mode off time set Sets the off-time during current chopping; tri-level pin
VINT 17 — Internal regulator Internal supply voltage; bypass to GND with 2.2-μF, 6.3-V capacitor
VM 15 PWR Power supply Connect to motor power supply; bypass to GND with a 0.1- and 10-μF (minimum) ceramic capacitor rated for VM
VREF 14 I Full-scale current reference input Voltage on this pin sets the full scale chopping current; short to VINT if not supplying an external reference voltage