TPS23730 IEEE 802.3bt PoE 2 PD IC Texas Instruments TPS23730 IEEE 802.3bt PoE 2 PD IC with high-efficiency DC-DC controller combines a Power over Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller. The controller is optimized for flyback and active clamp forward (ACF) switching regulator designs. In the case of flyback configuration, the use of primary-side regulation (PSR) is supported. The Texas Instruments TPS23730 PoE interface supports the IEEE 802.3bt standard for applications needing up to 51W or less at PD input.