ZHCSDQ2C January 2015 – September 2018 TPS7B7701-Q1 , TPS7B7702-Q1
PRODUCTION DATA.
The current limit on each channel is programmed by selecting the external resistor. The voltage on LIMx pin is compared with an internal voltage reference. When the threshold is exceeded, the current limit is triggered. The output of the current limited channel continues to remain on and the current is limited.
Under current-limit status, the ERR pin asserts low and the SENSE voltage of the fault channel is internally pulled up to a voltage rail between 2.4 V and 2.65 V as shown in Figure 19. At this moment, the output voltage is not disabled. The microcontroller (MCU) should monitor the voltage at the SENSEx pin or ERR pin to disable the faulted channel by pulling the ENx pin low. If a current-limit condition exists for a long period of time, thermal shutdown can be triggered and shutdown the output.