TIDUF84 June   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 UCC28810
      2. 2.3.2 MCF8315
      3. 2.3.3 MSPM0L
      4. 2.3.4 MSPM0C
  9. 3System Design Theory
    1. 3.1 MCF8315 Design
      1. 3.1.1 Power section
      2. 3.1.2 GPIO section
    2. 3.2 ACDC Design: Single Stage PFC
    3. 3.3 Host MCU Design
  10. 4Hardware, Software, Testing Requirements, and Test Results
    1. 4.1 Hardware Requirements
      1. 4.1.1 Hardware Overview
      2. 4.1.2 TIDA-010951 PCB
    2. 4.2 Software Requirements
    3. 4.3 Testing requirements
    4. 4.4 Test Setup
    5. 4.5 Test Results
      1. 4.5.1 Power Management in TIDA-010951
      2. 4.5.2 UCC28810 Based Single Stage PFC
      3. 4.5.3 BLDC Residential Fan Operation Using MCF8315C
        1. 4.5.3.1 Power-Up Sequence
        2. 4.5.3.2 Forward Windmilling (ISD Forward Resync)
        3. 4.5.3.3 Reverse Windmilling (ISD Reverse Resync)
        4. 4.5.3.4 Direction Reversal
        5. 4.5.3.5 Fan Acceleration/Deceleration
      4. 4.5.4 Thermal Performance
  11. 5Design and Documentation Support
    1. 5.1 Design Files
      1. 5.1.1 Schematics
      2. 5.1.2 BOM
    2. 5.2 Tools and Software
    3. 5.3 Documentation Support
    4. 5.4 Support Resources
    5. 5.5 Trademarks
  12. 6About the Author
  13. 7Recognition

2.3.2 MCF8315

The MCF8315 is part of TI’s latest generation of BLDC motor drivers with integrated code-free, sensorless FOC along with 40V, 240mΩ (HS+LS) FETs based 3-phase inverter power stage to provide a compact, efficient, “all-in-one” design for applications like residential fans, appliance pumps/fans, seat cooling blowers, projector fan etc.,

Key highlights include,

  • 40V, 240mΩ (HS+LS) FETs with integrated gate driver with configurable slew rate control to mitigate EMI
  • Integrated 3-phase current sensing to reduce BOM costs
  • Integrated sensorless FOC for low acoustic, high efficiency BLDC motor operation
  • Integrated power management features including configurable output voltage buck (3.3/4/5/5.7V) capable of delivering up to 170mA in addition to a 3.3V LDO capable of delivering up to 20mA
  • Configurable features like PWM switching frequency, PWM modulation schemes, minimum on time to improve efficiency
  • TI proprietary features like dead time compensation, reverse drive, active deceleration, DC bus current limit to enable differentiated end application performance
  • Compact 7x5mm, 40-pin QFN package: p2p with MCF8316 (40V, 95mΩ FETs) for higher power applications
  • Operating junction temperature absolute maximum ratings: -40°C to 150°C.
TIDA-010951 MCF8315C Block Diagram Figure 2-2 MCF8315C Block Diagram