In IEEE 802.3bt Power over Ethernet (PoE) applications, an isolated power supply is implemented in most Power Devices (PDs) for safety considerations. In addition, DC-DC output overcurrent protection is an important topic especially end-equipment damage that creates an output short circuit condition. This paper introduces the thermal issues that can exist in a prolonged output short condition and how to alleviate any thermal concerns with discrete hiccup circuit. This circuit could be implemented in all of tps2375x family of PoE PDs.
All other trademarks are the property of their respective owners.