SLVSE17A May 2019 – April 2020 TPS1HB16-Q1
When IOUT reaches the current limit threshold, ICL, the channel will switch off immediately. The ICL value will vary with slew rate and a fast current increase that occurs during a powered-on short circuit can temporarily go above the specified ICL value. When the switch is in the FAULT state it will output an output current ISNSFH on the SNS pin.
During a short circuit event, the device will hit the ICL value that is listed in the Electrical Characteristics table (for the given device version and RILIM) and then turn the output off to protect the device. The device will register a short circuit event when the output current exceeds ICL, however the measured maximum current may exceed the ICL value due to the TPS1HB16-Q1 deglitch filter and turn-off time. This deglitch time is defined at 3 µs so therefore use the test setup described in and take 3 µs before the peak value as the ICL. The device is guaranteed to protect itself during a short circuit event over the nominal supple voltage range (as defined in the Electrical Characteristics table) at 125°C.