7.3.4.1 Short-to-GND Protection

The TPS92612 device has OUT short-to-GND protection. The device monitors the V_(OUT) voltage when the output current is enabled and compares it with the internal reference voltage to detect a short-to-GND failure. If V_(OUT) falls below V_{(SG_th_falling)} longer than the deglitch time of t_{(SG_deg)}, the device asserts the short-to-GND fault. During the deglitching time period, if V_(OUT) rises above V_{(SG_th_rising)}, the timer is reset.

Once the device has detected a short-to-GND fault, the device turns off the output channel and retries automatically by sourcing a small current I_(retry) from IN to OUT to pull up the loads continuously, regardless of the state of the PWM input. Once auto retry detects output voltage rising above V_{(SG_th_rising)}, the device clears the short-to-GND fault and resumes normal operation.