ZHCSD91B January 2015 – January 2022 TPS65251-1 , TPS65251-2 , TPS65251-3
PRODUCTION DATA
All converters operate in hiccup mode: After an overcurrent event lasting more than 10 ms is sensed in any of the converters, all the converters shut down for 10 ms, then the start-up sequencing is retried. If the overload has been removed, the converter ramps up and operates normally. If this is not the case, the converter senses another overcurrent event and shuts down again, repeating the cycle (hiccup) until the failure is cleared.
If an overload condition lasts for <10 ms, only the relevant affected converter goes into and out of under voltage and no global hiccup mode occurs. The converter is protected by the cycle-by-cycle current limit during that time.