TPS23731RMTR

TPS23731 Power-over-Ethernet Power Device

Texas Instruments TPS23731 1-4 Power-over-Ethernet (PoE) Power Device (PD) combines a PoE PD interface and a current-mode DC-DC controller. The device is optimized for flyback switching regulator designs where the use of primary-side regulation (PSR) is supported. The PoE interface supports the IEEE 802.3bt and IEEE 802.3at standards for applications needing up to 25.5W or less at PD input. Programmable spread spectrum frequency dithering (SSFD) is provided to minimize the size and cost of the EMI filter. Advanced Startup with adjustable soft-start helps to use minimal bias capacitor while simplifying converter startup and hiccup design, also ensuring that IEEE 802.3bt/at startup requirements are met. The soft-stop feature of the Texas Instruments TPS23731 minimizes stress on switching sync FET(s), allowing FET BOM cost reduction.