Pulse transformers for devices with higher power demands

Mouser now stocks the B82806D pulse transformers from EPCOS, a TDK Group company. These new transformers are specifically for the IEEE 802.3bt Power over Ethernet++ (PoE++) standard for satisfying devices with higher power demands, such as lighting controllers, fire alarm systems, video and point-of-sale systems, and building access systems. The devices are a series of 60W PoE transformers with different turns ratios for output voltages of 3.3V, 5V, 12V, and 24V. They feature an EPCOS EFD 20 ferrite core; these PoE transformers provide DC resistance values as low as 3.5milliohms and a typical switching frequency of 250kHz. The transformers are compliant with UL 1446 class 130 (B) standards, are RoHS compatible, and can resist a high-voltage test for one second between the primary and secondary sides at 1500VAC, 50Hz. Capable of supplying powerful loads, the transformers’ high efficiency also makes them appropriate for active clamp forward converter topologies.