STDA015 February   2026 DRV8163-Q1 , DRV8263-Q1 , LM61495-Q1 , LM70880-Q1 , LM74500-Q1 , LMR36503-Q1 , MCF8329A-Q1 , TLIN4029A-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Examples of Using 48V in Body Motor Applications
    1. 2.1 Door Module
    2. 2.2 Window Lift
    3. 2.3 Wiper
    4. 2.4 Power Seat
  6. 3Benefits of 48V Supply
    1. 3.1 Increased Integration of Half-Bridges with 48V
    2. 3.2 Size Comparison Between 48V Integrated Driver vs 12V Gate Driver
    3. 3.3 Example Placement Study
  7. 4Thermal and EMC Performance Trade-off Considerations
    1. 4.1 Conduction Losses in the MOSFETs
    2. 4.2 Switching Losses During PWM
    3. 4.3 Experimental Results Show Effect of Slew Rate on Transistor Temperature During PWM
    4. 4.4 Fast Slew Rates Impact Electromagnetic Emissions
  8. 5Summary
  9. 6About the Authors
  10. 7References

3.1 Increased Integration of Half-Bridges with 48V

With the adoption of 48V systems, there is a trend towards increased integration of half-bridges within integrated motor driver ICs. Compared to using gate drivers with discrete MOSFETs, integrated driver designs offer:

  • Smaller form factor: Integrating multiple half-bridges and control logic into a single package reduces the overall size of the motor driver circuit.
  • Reduced complexity: Designing with integrated drivers simplifies the circuit board layout and reduces the number of external components, leading to a more streamlined design.
  • Enhanced features: Integrated drivers can incorporate additional features like integrated current sense using current mirrors, temperature sensing of the integrated drive stages, fully-integrated diagnostics, and advanced control algorithms like trapezoidal or Field-Oriented Control (FOC).