SLVSD18C June   2015  – August 2017 DRV8880

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Simplified System Diagram
      2.      Microstepping Current Waveform
  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 Indexer 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  Stepper Motor Driver Current Ratings
        1. 7.3.1.1 Peak Current Rating
        2. 7.3.1.2 RMS Current Rating
        3. 7.3.1.3 Full-Scale Current Rating
      2. 7.3.2  PWM Motor Drivers
      3. 7.3.3  Microstepping Indexer
      4. 7.3.4  Current Regulation
      5. 7.3.5  Decay Modes
        1. 7.3.5.1 Mode 1: Slow Decay for Increasing and Decreasing Current
        2. 7.3.5.2 Mode 2: Slow Decay for Increasing Current, Mixed Decay for Decreasing current
        3. 7.3.5.3 Mode 3: Mixed Decay for Increasing and Decreasing Current
        4. 7.3.5.4 Mode 4: Slow Decay for Increasing Current, Fast Decay for Decreasing current
        5. 7.3.5.5 Mode 5: Fast Decay for Increasing and Decreasing Current
      6. 7.3.6  Smart Tune
      7. 7.3.7  Adaptive Blanking Time
      8. 7.3.8  Charge Pump
      9. 7.3.9  LDO Voltage Regulator
      10. 7.3.10 Logic and Tri-Level Pin Diagrams
      11. 7.3.11 Power Supplies and Input Pins
      12. 7.3.12 Protection Circuits
      13. 7.3.13 VM UVLO (UVLO2)
      14. 7.3.14 Logic Undervoltage (UVLO1)
      15. 7.3.15 VCP Undervoltage Lockout (CPUV)
      16. 7.3.16 Thermal Shutdown (TSD)
      17. 7.3.17 Overcurrent Protection (OCP)
    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
        4. 8.2.2.4 Sense Resistor
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance Sizing
  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

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RHR|28
  • PWP|28
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.7 Adaptive Blanking Time

After the current is enabled in an H-bridge, the voltage on the xISEN pin is ignored for a period of time before enabling the current sense circuitry. Note that the blanking time also sets the minimum drive time of the PWM.

The blanking time is automatically scaled so that the drive time is reduced at lower current steps.

The time tBLANK is determined by the sine DAC code and the torque DAC setting. The timing information for tBLANK is given in Table 9.

Table 9. Adaptive Blanking Time Settings over Torque DAC and Microsteps

SINE DAC CODE TORQUE DAC TRQ[1:0] SETTING
00 – 100% 01 – 75% 10 – 50% 11 – 25%
16 1.80 µs 1.50 µs 1.50 µs 1.20 µs
15 1.80 µs 1.50 µs 1.50 µs 1.20 µs
14 1.80 µs 1.50 µs 1.50 µs 1.20 µs
13 1.80 µs 1.50 µs 1.50 µs 1.20 µs
12 1.80 µs 1.50 µs 1.50 µs 1.20 µs
11 1.80 µs 1.50 µs 1.50 µs 1.20 µs
10 1.80 µs 1.50 µs 1.50 µs 1.20 µs
9 1.80 µs 1.50 µs 1.50 µs 1.20 µs
8 1.50 µs 1.50 µs 1.20 µs 0.90 µs
7 1.50 µs 1.50 µs 1.20 µs 0.90 µs
6 1.50 µs 1.50 µs 1.20 µs 0.90 µs
5 1.50 µs 1.50 µs 1.20 µs 0.90 µs
4 1.20 µs 1.20 µs 0.90 µs 0.90 µs
3 1.20 µs 1.20 µs 0.90 µs 0.90 µs
2 0.90 µs 0.90 µs 0.90 µs 0.90 µs
1 0.90 µs 0.90 µs 0.90 µs 0.90 µs