JAJSFS7B July 2018 – February 2019 LM5180-Q1
ADVANCE INFORMATION for pre-production products; subject to change without notice.
In case of an overcurrent condition on the isolated output(s), the output voltage drops lower than the regulation level since the maximum power delivered is limited by the peak current capability on the primary side. The peak primary current is maintained at 1.5 A until the output decreases to the secondary diode voltage drop to impact the reflected signal on the primary side. At this point, the LM5180-Q1 assumes the output cannot be recovered and re-calibrates its switching frequency to 9 kHz until the overload condition is removed. The LM5180-Q1 responds with similar behavior to an output short circuit condition.