The MP8009A is an integrated IEEE 802.3af/at-compliant, Power over Ethernet (PoE) powered device (PD) power supply converter. It includes a PD interface and a high-efficiency flyback/forward controller.

The PD interface has all the functions of IEEE 802.3af/at, including detection, single-event and dual-event classification, a 120mA inrush current limit (I_{LIMIT_INRUSH}), an 840mA operational current limit (I_LIMIT), and a 100V hot-swap MOSFET.

The flyback/forward controller is specifically designed to be cost-effective. It is a space-saving isolated solution with primary-side regulation (PSR) for flyback applications, as well as high-efficiency secondary-side regulation (SSR) for active-clamp forward applications. It can also be used in SSR flyback topologies.

Full protection features include overload protection (OLP), short-circuit protection (SCP), over-voltage protection (OVP), and thermal shutdown. OLP, SCP, and OVP include hiccup mode.

The MP8009A can support a front-end solution for PoE PD applications with a minimal number of external components, and is available in a QFN-28 (4mmx5mm) package.