MP8009 Flyback/Forward Controllers Monolithic Power Systems (MPS) MP8009 Flyback/Forward Controllers are integrated IEEE 802.3af/at PoE compliant powered device (PD) power supply converters. The MP8009 interface comprises all IEEE 802.3af/at functions, including detection, 1-event and 2- event classification, 120mA inrush current limit, 840mA operation current limit, and a 100V hot-swap MOSFET.