ZHCSNR7A March 2022 – August 2022 TPS55289
PRODUCTION DATA
In addition to the average inductor current limit, the TPS55289 implements output short-circuit protection by entering hiccup mode. To enable hiccup mode, the HICCUP bit in register 06h must be set. After a 3.6-ms soft-start–up time, the TPS55289 monitors the average inductor current and output voltage. Whenever the output short circuit happens, causing the average inductor current to reach the set limit and the output voltage is below 0.8 V, the TPS55289 shuts down the switching for 76 ms (typical) and then repeats the soft start for 3.6 ms. The hiccup mode helps reduce the total power dissipation on the TPS55289 in output short-circuit or overcurrent condition.