STMicroelectronics

PM8804
Demoboard STEVAL-POE002V1

Power over Ethernet - PD converter with 5 V 8 A output, synchronous Flyback, IEEE802.3bt standard compliant

Topologie: Flyback
Eingangsspannung (min.): 40.00 V
Eingangsspannung (max.): 60.00 V
Schaltfrequenz (max.): 280.00 kHz
Ausgang 1: 5.00 V / 8.000 A

Erstveröffentlichung am 19.10.2018, Version 1 vom

Beschreibung

The STEVAL-POE002V1 power device evaluation board is equipped with a DC-DC converter stage, managed by the PM8804 controller, which provides 40 W (5 V-8 A) on the output.The DC-DC converter stage is based on the fixed frequency Flyback topology with a secondary synchronous rectification managed by the controller via gate driver transformer.The evaluation board embeds also the PM8805 controller, dedicated to the Ethernet interface (compliant with the Standard IEEE802.3.af/at/bt) and to the full active bridgerectification.

Merkmale

  • Based on PM8804 and PM8805
  • IEEE 802.3bt compliant PD interface
  • Works with power supplied from Ethernet LAN cables or local auxiliary sources
  • Line input voltage range: 40 to 60 VDC
  • Output voltage: 5 VDC ± 2.5%
  • Output current: 8 A
  • Peak-to-peak output ripple: < 50 mV
  • DC-DC full load efficiency: > 91%
  • Overall full load efficiency: > 90%
  • Transient response ΔV pk-pk 100% to 50% load step ≈ 700mV
  • Switching frequency ≈ 280 KHz

Artikel

  Artikel Nr. SPEC Produktserie L1
(µH)
Wicklungstyp Zmax
(Ω)
LSmin.
(nH)
RDC1 max.
(Ω)
VR
(V)
VT
(V (AC))
Muster
744272102 PDF WE-SL5 Stromkompensierter SMT Line Filter 1000 sectional 3600 5900 0.18 80 1000