SLVAFY3 January   2025 DRV8376 , DRV8376-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Application Overview
    1. 2.1 Automotive 48V HVAC Valves and Actuators
    2. 2.2 Building HVAC Valves and Actuators
    3. 2.3 Industrial Application with 48V Supply
      1. 2.3.1 Robotics and Humanoids
      2. 2.3.2 Server and Telecom
  6. 3Integrated FET 3-Phase Motor Driver DRV8376 for 48V Applications
  7. 4DRV8376 for High Performance System Design
    1. 4.1 Enabling 48V BLDC Motor Drive Applications
    2. 4.2 Compact Design with High Level Integration
    3. 4.3 Increased Power Delivery and Efficiency
    4. 4.4 Increased Creepage and Clearance
    5. 4.5 Improved Precision in Motor Control
    6. 4.6 Integrated Protection
    7. 4.7 EMI Optimization
  8. 5Summary
  9. 6References

4.7 EMI Optimization

DRV8376 comes with an adjustable OUTx voltage switching slew rate (dv/dt) setting. An adjustable gate-drive current control to the MOSFETs of half-bridges is implemented to achieve the slew rate control.

The MOSFET VDS slew rates are a critical factor for optimizing radiated emissions, and switching voltage transients related to parasitic.

The slew rate of each half-bridge can be adjusted by the SLEW pin in hardware device variant or by using the SLEW bits in SPI device variant. Each half-bridge can be selected to either of a slew rate setting of 1.1V/ns, 0.5V/ns, 0.25V/ns or 0.05V/ns. The slew rate is calculated by the rise time and fall time of the voltage on OUTx pin.