SLVSAX9E September   2011  – January 2016 DRV8818

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Motor Driver Timing Switching Characteristics
    8. 6.8 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 H-Bridge Drivers
      2. 7.3.2 Current Regulation
      3. 7.3.3 Decay Mode
      4. 7.3.4 Microstepping Indexer
      5. 7.3.5 Protection Circuits
        1. 7.3.5.1 Overcurrent Protection (OCP)
        2. 7.3.5.2 Thermal Shutdown (TSD)
        3. 7.3.5.3 Undervoltage Lockout (UVLO)
    4. 7.4 Device Functional Modes
      1. 7.4.1 RESETn, ENABLEn, and SLEEPn Operation
      2. 7.4.2 Decay 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. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Heatsinking
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
      1. 10.3.1 Power Dissipation
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 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

PWP Package
28-Pin HTSSOP
Top View
DRV8818 drv8811_pin_lvs865.gif

Pin Functions

PIN TYPE(1) DESCRIPTION
NAME NO.
POWER AND GROUND
CP1 23 IO Charge pump flying capacitor Connect a 0.22-μF capacitor between CP1 and CP2.
CP2 24 IO Charge pump flying capacitor Connect a 0.22-μF capacitor between CP1 and CP2.
GND 7, 21 — Device ground
VCC 10 — Logic supply voltage Connect to 3-V to 5-V logic supply. Bypass to GND with a 0.1-μF ceramic capacitor.
VCP 22 IO High-side gate drive voltage Connect a 0.22-μF ceramic capacitor to VM.
VGD 20 IO Low-side gate drive voltage Bypass to GND with a 0.22-μF ceramic capacitor.
VMA 28 — Bridge A power supply Connect to motor supply (8 V to 35 V). Both VMA and VMB must be connected to same supply.
VMB 15 — Bridge B power supply
CONTROL
DECAY 5 I Decay mode select Voltage applied sets decay mode - see motor driver description for details. Bypass to GND with a 0.1-μF ceramic capacitor. Weak internal pulldown.
DIR 3 I Direction input Level sets the direction of stepping. Weak internal pulldown.
ENABLEn 26 I Enable input Logic high to disable device outputs, logic low to enable outputs. Weak internal pullup to VCC.
ISENA 1 — Bridge A ground / Isense Connect to current sense resistor for bridge A
ISENB 14 — Bridge B ground / Isense Connect to current sense resistor for bridge B
RCA 6 I Bridge A blanking and off time adjust Connect a parallel resistor and capacitor to GND - see motor driver description for details.
RCB 9 I Bridge B blanking and off time adjust Connect a parallel resistor and capacitor to GND - see motor driver description for details.
RESETn 17 I Reset input Active-low reset input initializes the indexer logic and disables the H-bridge outputs. Weak internal pullup to VCC.
SLEEPn 27 I Sleep mode input Logic high to enable device, logic low to enter low-power sleep mode. Weak internal pulldown.
SRn 16 I Sync. Rect. enable input Active-low. When low, synchronous rectification is enabled. Weak internal pulldown.
STEP 19 I Step input Rising edge causes the indexer to move one step. Weak internal pulldown.
USM0 13 I Microstep mode 0 USM0 and USM1 set the step mode - full step, half step, quarter step, or eight microsteps/step. Weak internal pulldown.
USM1 12 I Microstep mode 1 USM0 and USM1 set the step mode - full step, half step, quarter step, or eight microsteps/step. Weak internal pulldown.
VREF 8 I Current set reference input Reference voltage for winding current set
OUTPUTS
AOUT1 4 O Bridge A output 1 Connect to bipolar stepper motor winding
AOUT2 25 O Bridge A output 2 Positive current is AOUT1 → AOUT2
BOUT1 11 O Bridge B output 1 Connect to bipolar stepper motor winding
BOUT2 18 O Bridge B output 2 Positive current is BOUT1 → BOUT2
HOMEn 2 O Home position Logic low when at home state of step table, logic high at other states
(1) Directions: I = input, O = output, OZ = 3-state output, OD = open-drain output, IO = input/output