SLVA321A August   2011  – April 2021 DRV8811 , DRV8818 , DRV8821 , DRV8823 , DRV8823-Q1

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Asynchronous Decay
    2. 1.2 Synchronous Decay
  3. 2Current Recirculation
    1. 2.1 Fast Decay
    2. 2.2 Slow Decay
    3. 2.3 Mixed Decay
      1. 2.3.1 Mixed Decay Modes
    4. 2.4 Smart Tune
  4. 3References
  5. 4Revision History

1.1 Asynchronous Decay

When diodes are used to accept the current flow while it decays, this is referred to as asynchronous decay. It is asynchronous to the controller turning the FET switches ON and OFF. The timing of when the diodes will start conducting is not known, but it is highly recommended for this turn ON time to be as short as possible in order to avoid possible damage to the FET switches. Schottky diodes are often used for this purpose.