SLIS178B October 2017 – January 2018 TPS92830-Q1
Once the channel has asserted an open-circuit fault, it automatically retries periodically. The device sources I(Retry_open) through the SENSEx pin to pull up the LED loads with a pulse duration of t(OPEN_retry_ON). In PWM mode, the device waits for t(OPEN_retry_OFF) until the next retry pulse. Once auto retry detects that the open-circuit fault has been removed, the device resumes normal operation. During auto retry mode, the device ignores PWM inputs. In the open-circuit scenario, the retry current cannot find a path to ground; thus, total current consumption does not increase.