ZHCSKY4B November 2018 – December 2020 TPS55288
PRODUCTION DATA
In addition to the average inductor current limit, the TPS55288 implements the output short-circuit protection by entering hiccup mode. To enable hiccup mode, the HICCUP bit in register 06h must be set. After soft start-up time of 4 ms, the TPS55288 monitors the average inductor current and output voltage. Whenever the output short circuit happens, causing the average inductor current hitting the set limit and the output voltage below 0.8 V, the TPS55288 shuts down the switching for 76 ms (typical) and then repeats the soft start for 4 ms. The hiccup mode helps reduce the total power dissipation on the TPS55288 in the output short-circuit or overcurrent condition.