Fully Integrated, 802.3af/at-Compliant, PoE, PD Interface with a  Peak-Current-Mode Flyback Controller



The MP8008L is an integrated, IEEE, 802.3af/at, PoE-compliant, powered device (PD), power supply converter. The MP8008L includes PD interface and a peak-current-mode flyback controller.
The PD interface has all the functions of IEEE 802.3af/at, including detection, 1-event and 2-event classification, 85mA inrush current limit, 840mA operation current limit, and a 100V hot-swap MOSFET.
The flyback pulse-width modulation (PWM) controller can drive an external MOSFET capable of handling more than 10A of current for high-power flyback PoE applications. Pulse-skip mode improves efficiency in light-load conditions. Other protection features include overload protection (OLP), short output, and over-voltage protection (OVP).
The MP8008L can support a front-end solution for PoE PD application with minimal external components and is available in a QFN-28 (4mmx5mm) package.


  • Compatible with 802.3af/at Specifications
  • 34V PD Power-On Rising UVLO
  • 100V, 0.48Ω PD Integrated Pass Switch
  • 85mA PD Inrush Current 
  • 840mA PD Operation Current Limit
  • Auxiliary Adaptor O-Ring Power Supply
  • PD Power Good and Type-2 PSE Indicator
  • 12V, 1A, Flyback MOSFET Gate Driver
  • Pulse-Skip Operation in Light Load
  • Programmable Switching Frequency: 30kHz - 400kHz
  • Frequency Synchronizing from 80kHz - 400kHz
  • Cycle-by-Cycle Current Limit
  • Overload Protection (OLP), Short-Circuit Protection (SCP), Over-Voltage Protection (OVP), and Thermal Protection 
  • Available in a QFN-28 (4mmx5mm) Package


  • GradeCatalog
  • Max Duty Cycle (%)95
  • PoE Standards Supported802.3af/at
  • PoE Ilimit (mA)840
  • PoE Inrush Limit (mA)85
  • Pass Switch Rds(on) (Ω)0.48
  • PackageQFN-28 (4x5)
  • Fault ResponseHiccup
  • DC/DC TopologyFlyback
  • DC/DC Controller or ConverterController
  • Special Features外部频率同步