SLVAFZ0 November   2024 DRV8161 , DRV8162

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Three-Phase Gate Driver
    1. 2.1 Architecture
    2. 2.2 Layout Considerations
      1. 2.2.1 Advantages
        1. 2.2.1.1 MCU to DRV Signal Routing
        2. 2.2.1.2 Component Reduction
      2. 2.2.2 Challenges
        1. 2.2.2.1 MOSFET Placement
    3. 2.3 Typical Applications
  6. 3Half-Bridge (Single Phase) Gate Driver
    1. 3.1 Architecture
    2. 3.2 Layout Considerations
      1. 3.2.1 Advantages
        1. 3.2.1.1 MOSFET Placement
        2. 3.2.1.2 Independent Control
        3. 3.2.1.3 Ease of Replacement
      2. 3.2.2 Challenges
        1. 3.2.2.1 Longer Routing Between Gate Driver and Micro Controller
        2. 3.2.2.2 Additional Component Requirements
    3. 3.3 Typical Applications
  7. 4Summary
  8. 5References

3.2.1.2 Independent Control

Since each of the half-bridge is a stand-alone unit, the user has independent control over each of them. This allows for more flexibility in the design and application as driver can receive individual commands from the MCU. Customizable gate drive current between different phases are an option with this approach. This is more of an advantage if drivers are being to drive non-three phase BLDC motor. For example, in applications where a BDC motor is used in conjunction with an actuator. Each phase can be independently driven with a three-phase gate driver but there can be space and cost disadvantages when only two phases are needed from a three-phase driver. And the settings such as Idrive, gain, and deadtime are set for all three phases and are not customizable.