SLVAES1A June   2020  – May 2022 DRV8300

 

  1.   Trademarks
  2. 1Motor Considerations and Why Brushless DC Motors?
  3. 2Motor Driver Architecture
    1. 2.1 Gate Driver vs Integrated FET Driver: Power, Voltage, and Current Requirements
    2. 2.2 Three Use Cases: Speed, Torque, or Position:
    3. 2.3 Control Methods: Trap, Sine, or FOC
      1. 2.3.1 Trapezoidal
      2. 2.3.2 Sinusoidal
      3. 2.3.3 Field-Oriented Control
    4. 2.4 Sensored Versus Sensorless
      1. 2.4.1 Sensored
      2. 2.4.2 Sensorless
    5. 2.5 Current Sense Amplifiers
    6. 2.6 Interface
    7. 2.7 Power Integration
    8. 2.8 100% Duty Cycle Support
  4. 3Texas Instruments' Brushless-DC Motor Drivers
    1. 3.1 Gate Drivers: DRV8x and DRV3x family
      1. 3.1.1 DRV8x Family
      2. 3.1.2 DRV3x Family
    2. 3.2 Integrated MOSFET: DRV831x Family
    3. 3.3 Control and Gate Driver: MCx Family
    4. 3.4 Full Integration: MCx831x and DRV10x Family
      1. 3.4.1 MCx831x Family
      2. 3.4.2 DRV10x family
  5. 4Conclusion
  6. 5Revision History

2.7 Power Integration

To supply external rails to power other devices or circuits in the system (such as MCUs and CSA reference voltages), many TI BLDC motor drivers offer integrated buck regulators and linear dropout regulators (LDOs) regulators. These regulators offer high efficiency without the need

Integrated buck regulators can support up to 600-mA external load current depending on the device. The output voltage of the regulator can be adjustably designed or configured over SPI/hardware on many devices. Integrated LDOs can support up to 100-mA external load current for a fixed 3.3-V or 5-V rail (AVDD or DVDD) depending on the device.

GUID-20220503-SS0I-DDXS-PCLD-6CTQN6JW4K80-low.png Figure 2-12 Examples of Buck and LDO Regulators Integrated in BLDC Motor Drivers