SLDS227 March   2016 DRV10964

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  Sleep Mode
      2. 7.3.2  Speed Input and Control
      3. 7.3.3  Motor Direction Change
      4. 7.3.4  Motor Frequency Feedback (FG)
        1. 7.3.4.1 Tach Feedback During Spin Down
      5. 7.3.5  Lock Detection
        1. 7.3.5.1 Lock0: No Motor
        2. 7.3.5.2 Lock1: Frequency Overflow
        3. 7.3.5.3 Lock2: BEMF Abnormal
          1. 7.3.5.3.1 Lock 3: Accelerate Abnormal
        4. 7.3.5.4 Lock4: Speed Abnormal
      6. 7.3.6  Short Circuit Current Protection
      7. 7.3.7  Anti-Voltage Surge (AVS)
        1. 7.3.7.1 Protecting Against the Return of Mechanical Energy
        2. 7.3.7.2 Protecting Against the Return of Inductive Energy
      8. 7.3.8  Overtemperature Protection
      9. 7.3.9  Undervoltage Protection
      10. 7.3.10 CONFIG Configuration
    4. 7.4 Device Functional Modes
      1. 7.4.1 Spin up Settings
        1. 7.4.1.1 Motor Kt and Rm
        2. 7.4.1.2 Motor Start
        3. 7.4.1.3 Initial Speed Detect (ISD)
        4. 7.4.1.4 Align
        5. 7.4.1.5 Handoff and Closed Loop
  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 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 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

DRV10964 is used in sensorless three-phase BLDC motor control. The driver provides a high performance, high reliability, flexible and simple solution for compute fan applications. The following design shows a common application of the DRV10964.

8.2 Typical Application

DRV10964 typ_app_cir_drv10964.gif Figure 16. Typical Application Schematic

8.2.1 Design Requirements

Table 3 lists several key motor characteristics and recommended ranges which the DRV10964 is capable of driving. However, that does not necessarily mean motors outside these boundaries cannot be driven by DRV10964.

Recommended ranges listed in Table 3 can serve as a general guideline to quickly decide whether DRV10964 is a good fit for an application. Motor performance is not ensured for all uses.

Table 3. Key Motor Characteristics and Recommended Ranges

Rm (Ω) Lm (µH) Kt (mV/Hz) fFG_max (Hz)
Recommended Value 2.5 ~ 10 50 ~ 1000 1 ~ 100 1300

Rm - Motor phase resistance between phase to phase;

Lm - Motor phase to phase inductance between phase to phase;

Kt - Motor BEMF constant from phase to center tape;

fFG_max - Maximum electrical frequency. Maximum motor speed can be calculated from:

  • If FGS = 1, RPM = (fFG_max × 3 x 60)/ number of pole pairs
  • If FGS = 0, RPM = (fFG_max × 120)/ number of pole pairs

8.2.2 Detailed Design Procedure

1. Refer to Design Requirements and make sure your system meets the recommended application range.

2. Refer to the DRV10964 Tuning Guide and measure the motor parameters.

3. Refer to the DRV10964 Tuning Guide. Configure the parameters using DRV10964 GUI, and optimize the motor operation. The Tuning Guide takes the user through all the configurations step by step, including: start-up operation, closed-loop operation, current control, initial positioning, lock detection, and anti-voltage surge.

4. Build your hardware based on Layout Guidelines.

5. Connect the device into system and validate your system solution

8.2.3 Application Curves

DRV10964 ref_PCB_sinusoidal_current_profile_slds227.jpg
Figure 17. Reference PCB Sinusoidal Current Profile
DRV10964 ref_PCB_open_loop_and_close_loop_slds227.jpg
Figure 19. Reference PCB Open Loop and Close Loop
DRV10964 ref_PCB_start_up_align_acceleration_slds227.jpg
NOTE: FG_OUT Signal Being Held HIGH During Locked Rotor Condition (Stall)
Figure 18. Reference PCB Start-Up (Align-Acceleration) Profile
DRV10964 ref_PCB_closed_loop_slds227.jpg
Figure 20. Reference PCB Closed Loop