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IC-Hersteller STMicroelectronics

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STMicroelectronics PM8804 | Demoboard STEVAL-POE002V1

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

Details

Topologie Sperrwandler
Eingangsspannung 40-60 V
Schaltfrequenz 280 kHz
Ausgang 1 5 V / 8 A
IC-Revision 1

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.

Eigenschaften

  • 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

Typische Anwendungen

  • PoE powered devices such as IP phones, WLAN access points and network cameras / Telecom power supplies

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Downloads Produktserie Wicklungstyp Windungsanzahl L1
(µH)
Zmax
(Ω)
IR 1
(mA)
RDC1 max.
(Ω)
VR
(V)
Muster
744272102
STE ALT EAG CAD LTS PSP IGS CAD SPA WE-SL5 Stromkompensierter SMT Line Filter sectional 2 1000 3600 950 0.18 80
Artikel Nr. Daten­blatt
744272102
Muster
Artikel Nr. Daten­blatt Downloads Produktserie Wicklungstyp Windungsanzahl L1
(µH)
Zmax
(Ω)
IR 1
(mA)
RDC1 max.
(Ω)
VR
(V)
Muster