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5 V/4 A, synchronous flyback converter, Power Over Ethernet (PoE) - IEEE 802.3at compliant reference design

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Parameter NameParameter Value
Target ApplicationDC-DC Topologies
Core ProductPM8803
Packing TypeNot Applicable
RoHs compliantEcopack2
Package NameCARD

The STEVAL-TSP004V2 is a reference design for a PoE+, high-efficiency, 5 V/4 A flyback converter based on the PM8803 PoE controller.

The PM8803 is a highly integrated device embedding an IEEE802.3at-compliant powered device (PD) interface together with a PWM controller and support for auxiliary sources.

The STEVAL-TSP004V2 reference design is based on an isolated flyback CCM converter featuring synchronous rectification with gate driver transformer.

Key features
  • IEEE 802.3at compliant PD interface
  • Works with power supplied from Ethernet LAN cables or from local auxiliary sources
  • Line input voltage range: 40 to 60 VDC
  • Output voltage: 5 VDC ± 5%
  • Output current: 4 A
  • Peak-to-peak output ripple: < 30 mV
  • Efficiency DC-DC full-load: > 92%
  • Overall peak efficiency: > 89%
  • Transient response ΔVOUTPK-PK to 50% load step: < 170 mV
  • ΔV in load line case: < 0.5%
  • RoHs compliant
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