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Power over Ethernet - PD converter with 5 V 2 A output, standard IEEE 802.3af compliant

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Parameter NameParameter Value
Target ApplicationDC-DC Topologies
Core ProductPM8800A
Packing TypeNot Applicable
RoHs compliantEcopack2
Package NameCARD

This document focuses on a reference design for a simple, low cost 5 V 2 A flyback converter based on the PM8800A device.

The PM8800A is a highly integrated device embedding an IEEE 802.3af compliant “Powered Device” (PD) interface together with a PWM controller.

It can be successfully used in all low power, low cost PoE applications.

Key features
  • IEEE 802.3af compliant PD interface
  • Works with power supplied from Ethernet LAN cables or from local auxiliary sources
  • Line input voltage range: 40 Vdc to 60 Vdc output voltage: 5 Vdc ± 5%
  • Output current: 2 A
  • Peak-to-peak output ripple: 30 mV
  • Efficiency DC-DC full-load: > 86%
  • Efficiency overall peak: > 84%
  • Transient response ΔVoutpk-pkto 50% load step: < 300m Vpp
  • ΔV in load line case: < 0.5%