SBVS206A November   2012  – March 2015 DRV10866

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 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 Speed Control
      2. 7.3.2 Frequency Generator
      3. 7.3.3 Lock Protection
      4. 7.3.4 Voltage Surge Protection
      5. 7.3.5 Overcurrent Protection
      6. 7.3.6 Undervoltage Lockout (UVLO)
      7. 7.3.7 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Start-up
      2. 7.4.2 Motor Running at Steady-State Speed
      3. 7.4.3 Motor Stopping
  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
      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 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

8.1 Application Information

DRV10866 only requires three external components. The device needs a 2.2-μF or higher ceramic capacitor connected to VCC and ground for decoupling. During layout, the strategy of ground copper pour is very important to enhance the thermal performance. For two or more layers, use eight thermal vias. Refer to Layout Example for an example of the PCB layout. If there is no COM pin on the motor, one can be simulated. Use three resistors connected in a wye formation, one connected to U, one to V, and one to W. Connect the resistor ends opposite of the phases together. This center point is COM. To find the proper resistor value, start with a value of 10 kΩ and continue to decrease by 1 kΩ until the motor runs properly.

8.2 Typical Application

DRV10866 typ_app_bvs155.gifFigure 4. Typical Application Schematic

8.2.1 Design Requirements

For this design example, use the parameters listed in Table 2 as the input parameters.

Table 2. Recommended Application Range

MIN TYP MAX UNIT
Motor voltage 1.6 5.5 V
VCC capacitor Place as close to the pin as possible 2.2 µF
Operating current Running with normal load at rated speed 500 mA
Absolute max current During start-up and locked motor condition 650 mA

8.2.2 Detailed Design Procedure

  • Refer to the Design Requirements and ensure the system meets the recommended application range.
    • Ensure the VCC level is in between 1.6 and 5.5 V
    • Verify the motor needs no more than 500 mA during runtime.
  • Follow the application and Power Supply Recommendations when constructing the schematic.
    • Make sure there is adequate capacitance on VCC.
    • Size the resistor on CS according to the details given in Feature Description.
    • Use a pullup on FG.
    • If the motor doesn’t have a common pin, create one using the method listed in Application Information.
  • Build the hardware according to the Layout Guidelines.
  • Test the system with the application's motor to verify proper operation.

8.2.3 Application Curves

DRV10866 AppCurve1.pngFigure 5. Normal Operation With Vcom at 5 V
DRV10866 AppCurve3.pngFigure 7. Normal Operation With 3-Phase Voltage and
ph-A Current at 5 V
DRV10866 AppCurve5.pngFigure 9. Re-Synchronizing to Spinning Motor During Power On-Off Cycle at 5 V
DRV10866 tc_vin_duty_scope01_bvs155.gifFigure 11. Start-Up at 100% Duty Cycle
DRV10866 tc_normal_run_scope02_bvs155.gifFigure 13. Normal Operation at 100% Duty Cycle
DRV10866 lock_protect_bvs206.gifFigure 15. Lock Protection
DRV10866 tc_fall_asleep_scope02_zoom_bvs155.gifFigure 17. Clamp Voltage at Standby Mode
Enlarged View
DRV10866 AppCurve2.pngFigure 6. Normal Operation With Vcom at 1.65 V
DRV10866 AppCurve4.pngFigure 8. Normal Operation With 3-Phase Voltage and
ph-A Current at 1.65 V
DRV10866 AppCurve6.pngFigure 10. Re-Synchronizing to Spinning Motor During Power On-Off Cycle at 1.8 V
DRV10866 tc_vin_duty_scope02_bvs155.gifFigure 12. Start-Up at 10% Duty Cycle
DRV10866 tc_normal_run_scope01_bvs155.gifFigure 14. Normal Operation at 50% Duty Cycle
DRV10866 tc_fall_asleep_scope01_bvs155.gifFigure 16. Clamp Voltage at Standby Mode