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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
Overview
| Topology | Flyback Converter |
| Input voltage | 40-60 V |
| Switching frequency | 280 kHz |
| Output 1 | 5 V / 8 A |
| IC revision | 1 |
Description
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.
Features
- 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
Typical applications
- PoE powered devices such as IP phones, WLAN access points and network cameras / Telecom power supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Winding Style | Number of windings | L1(µH) | Zmax(Ω) | IR(mA) | RDC max.(Ω) | VR(V) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL5 SMT Common Mode Line Filter | Winding Stylesectional | Number of windings2 | Inductance [1]1000 µH | Maximum Impedance3600 Ω | Rated Current950 mA | DC Resistance [1]0.18 Ω | Rated Voltage80 V |