STMicroelectronics

PM8804
Demoboard STEVAL-POE003V1

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 01.03.2019, 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 I EEE802.3.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 RDC
(mΩ)
L
(µH)
IR
(A)
ISAT
(A)
fres
(MHz)
Version L1
(µH)
Wicklungstyp Zmax
(Ω)
LSmin.
(nH)
RDC1 max.
(Ω)
VR
(V)
VT
(V (AC))
Datenrate Anzahl Ports PoE HPLE Betriebstemperatur Montageart Muster
74439346056 PDF WE-XHMI SMT Speicherdrossel 15 5.6 6.9 13.6 22 SMT
744272471 PDF WE-SL5 Stromkompensierter SMT Line Filter 470 sectional 1750 3000 0.065 80 1000
7490220123 PDF WE-LAN LAN Übertrager 200 1500 1000 Base-T 1 4PPoE (bis zu 1500 mA) Nein -40 up to +105 °C SMT