SLVSCH0 April   2014 DRV8824-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Terminal Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 PWM Motor Drivers
      2. 8.3.2 Current Regulation
      3. 8.3.3 Blanking Time
      4. 8.3.4 Microstepping Indexer
      5. 8.3.5 nRESET, nENBLE and nSLEEP Operation
      6. 8.3.6 Protection Circuits
        1. 8.3.6.1 Overcurrent Protection (OCP)
        2. 8.3.6.2 Thermal Shutdown (TSD)
        3. 8.3.6.3 Undervoltage Lockout (UVLO)
      7. 8.3.7 Thermal Information
        1. 8.3.7.1 Thermal Protection
        2. 8.3.7.2 Power Dissipation
        3. 8.3.7.3 Heatsinking
    4. 8.4 Device Functional Modes
      1. 8.4.1 Decay Mode
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Stepper Motor Speed
        2. 9.2.2.2 Current Regulation
        3. 9.2.2.3 Decay Modes
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

6 Terminal Configuration and Functions

PWP Package
(Top View)
po_lvsa06.gif

Terminal Functions

NAME TERMINAL I/O DESCRIPTION EXTERNAL COMPONENTS
OR CONNECTIONS
POWER AND GROUND
GND 14, 28 - Device ground
VMA 4 - Bridge A power supply Connect to motor supply (8.2 V - 45 V). Both terminals must be connected to same supply.
VMB 11 - Bridge B power supply
V3P3OUT 15 O 3.3-V regulator output Bypass to GND with a 0.47-μF 6.3-V ceramic capacitor. Can be used to supply VREF.
CP1 1 IO Charge pump flying capacitor Connect a 0.01-μF 50-V capacitor between CP1 and CP2.
CP2 2 IO Charge pump flying capacitor
VCP 3 IO High-side gate drive voltage Connect a 0.1-μF 16-V ceramic capacitor and a 1-MΩ resistor to VM.
CONTROL
nENBL 21 I Enable input Logic high to disable device outputs and indexer operation, logic low to enable. Internal pulldown.
nSLEEP 17 I Sleep mode input Logic high to enable device, logic low to enter low-power sleep mode. Internal pulldown.
STEP 22 I Step input Rising edge causes the indexer to move one step. Internal pulldown.
DIR 20 I Direction input Level sets the direction of stepping. Internal pulldown.
MODE0 24 I Microstep mode 0 MODE0 - MODE2 set the step mode - full, 1/2, 1/4, 1/8/ 1/16, or 1/32 step. Internal pulldown.
MODE1 25 I Microstep mode 1
MODE2 26 I Microstep mode 2
DECAY 19 I Decay mode Low = slow decay, open = mixed decay,
high = fast decay. Internal pulldown and pullup.
nRESET 16 I Reset input Active-low reset input initializes the indexer logic and disables the H-bridge outputs. Internal pulldown.
AVREF 12 I Bridge A current set reference input Reference voltage for winding current set. Normally AVREF and BVREF are connected to the same voltage. Can be connected to V3P3OUT. A 0.01-µF bypass capacitor to GND is recommended.
BVREF 13 I Bridge B current set reference input
NC 23 No connect Leave this terminal unconnected.
STATUS
nHOME 27 OD Home position Logic low when at home state of step table
nFAULT 18 OD Fault Logic low when in fault condition (overtemp, overcurrent)
OUTPUT
ISENA 6 IO Bridge A ground / Isense Connect to current sense resistor for bridge A.
ISENB 9 IO Bridge B ground / Isense Connect to current sense resistor for bridge B.
AOUT1 5 O Bridge A output 1 Connect to bipolar stepper motor winding A.
Positive current is AOUT1 → AOUT2
AOUT2 7 O Bridge A output 2
BOUT1 10 O Bridge B output 1 Connect to bipolar stepper motor winding B.
Positive current is BOUT1 → BOUT2
BOUT2 8 O Bridge B output 2