ZHCS276F September 2011 – February 2025 DRV8818
PRODUCTION DATA
The DRV8818 supports three different decay modes: slow decay, fast decay, and mixed decay. The current through the motor windings is regulated using a fixed off time scheme.
This means that the current will increase until it reaches the current chopping threshold (ITRIP), after which it will enter the set decay mode for a fixed period of time. The cycle will then repeat after the decay period expires.
The blanking time tBLANK defines the minimum drive time for the current chopping. ITRIP is ignored during tBLANK, so the winding current may overshoot the trip level.