SLLSFH8A August 2021 – December 2021 MCT8316A
Cycle-by-cycle (CBC) current limit provides a means of controlling the amount of current delivered to the motor. This is useful when the system must limit the amount of current pulled from the power supply during motor operation. The CBC current limit limits the current applied to the motor from exceeding the configured threshold. CBC current limit functionality is achieved by connecting the output of current sense amplifier VSOX to a hardware comparator. If the voltage at output of current sense amplifier exceeds the CBC_ILIMIT threshold, a CBC_ILIMIT event is recognized and action is taken according to CBC_ILIMIT_MODE. Total delay in reaction to this event is dependent on the current sense amplifier gain and the comparator delay. CBC current limit in closed loop is set through CBC_ILIMIT while configuration of OL_ILIMIT_CONFIG sets the CBC current limit in open loop operation. Different modes can be configured through CBC_ILIMIT_MODE: CBC_ILIMIT automatic recovery next PWM cycle, CBC_ILIMIT automatic recovery threshold based, CBC_ILIMIT automatic recovery number of PWM cycles based, CBC_ILIMIT report only, CBC_ILIMIT disabled.