SLUSCE3C October 2015 – August 2020 TPS2549-Q1
PRODUCTION DATA
When an overcurrent condition is detected, the device maintains a constant output current and reduces the output voltage accordingly. Two possible overload conditions can occur. In the first condition, the output is shorted before the device enables or before the application of V(IN). The TPS2549-Q1 device senses the short and immediately switches into a constant-current output. In the second condition, a short or an overload occurs while the device is enabled. At the instant the overload occurs, high currents flow for 2 μs (typical) before the current-limit circuit reacts. The device operates in constant-current mode after the current-limit circuit has responded. Complete shutdown occurs only if the fault is presented long enough to activate overtemperature protection. The device remains off until the junction temperature cools to approximately 20°C and then restarts. The device continues to cycle on and off until the overcurrent condition is removed.