ZHCSN08D August 2020 – April 2024 DRV8714-Q1 , DRV8718-Q1
PRODMIX
The PDR pre-charge/pre-discharge control loop operates to achieve a user configured turn on and turn off propagation delay (T_DON_DOFF_x) by dynamically adjusting the driver pre-charge (IPRE_CHR) and pre-discharge (IPRE_DCHR) current levels through a proportional gain error controller (KP_PDR_x). The error controller measures the difference in the measured propagation delays (tON, tOFF) compared to the configured propagation delay (T_DON_DOFF_x) and updates the pre-charge current level for the next switching cycle. The control loop can be operated with the default configuration settings of the device, but full flexibility is provided to configure the timing parameters, initial current levels, error controller strength, and other settings.