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STMicroelectronics PM8804 | Demoboard STEVAL-POE003V1
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 I EEE802.3.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 | Simulation | Downloads | Status | Produktserie | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | RDC max.(mΩ) | fres(MHz) | Wicklungstyp | Wicklungsanzahl | L1(µH) | Zmax(Ω) | IR 1(mA) | RDC1 max.(Ω) | VR(V) | Datenrate | Ports | PoE | Improved CMRR | Betriebstemperatur | VT(V (AC)) | Montageart | L(µH) | LSmin.(nH) | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-XHMI SMT Speicherdrossel, 8.9 A, 12.1 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-XHMI SMT Speicherdrossel | Performance Nennstrom8.9 A | Sättigungsstrom @ 30%12.1 A | Gleichstromwiderstand15 mΩ | Gleichstromwiderstand16.5 mΩ | Eigenresonanzfrequenz25 MHz | – | Wicklungsanzahl1 | – | – | – | – | – | – | – | – | – | Betriebstemperatur -40 °C up to +125 °C | – | MontageartSMT | Induktivität5.6 µH | – | ||||
 | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-SL5 Stromkompensierter SMT Line Filter | – | – | – | Gleichstromwiderstand65 mΩ | – | WicklungstypSektional | Wicklungsanzahl2 | Induktivität [1]470 µH | Maximale Impedanz1800 Ω | Nennstrom [1]1600 mA | Gleichstromwiderstand [1]0.065 Ω | Nennspannung80 V | – | – | – | – | Betriebstemperatur -40 °C up to +125 °C | Prüfspannung1000 V (AC) | MontageartSMT | Induktivität470 µH | Streuinduktivität [min.]3000 nH | |||||
 | WE-LAN LAN Übertrager, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LAN LAN Übertrager | – | – | – | – | – | – | – | Induktivität [1]180 µH | – | – | – | – | Datenrate1000 Base-T | Ports1 | PoE4PPoE (bis zu 1500 mA) | Verbesserte Common Mode EntstörungNein | Betriebstemperatur -40 °C up to +105 °C | Prüfspannung1500 V (AC) | MontageartSMT | Induktivität180 µH | – |