SLUS907K January 2009 – June 2019 TPS2421-1 , TPS2421-2
PRODUCTION DATA.
When load current exceeds ISET during normal operation the fault timer starts. If load current drops below ISET before the fault timer expires, normal operation continues. If load current stays above the ISET threshold the fault timer expires and a fault is declared. When a fault is declared a TPS2421-1 device turns off an can be restarted by cycling power or toggling the EN signal. A TPS2421-2 device attempts to turn on at a 3.7% duty cycle until the fault is cleared. When ILIM is reached during a fault the device goes into current limit and the fault timer keeps running.