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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
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 I EEE802.3.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 | Product series | IRP,40K (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Number of windings | L1 (µH) | Zmax (Ω) | VR (V) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (AC)) | Mount | L (µH) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 74439346056 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | 8 files | WE-XHMI SMT Power Inductor | 8.9 | 12.1 | 15 | 25 | 1 | – | – | – | – | – | – | – | -40 °C up to +125 °C | – | SMT | 5.6 | ||
 | 744272471 | SPEC | 8 files | WE-SL5 SMT Common Mode Line Filter | – | – | – | – | – | – | 1750 | 80 | – | – | – | – | – | 1000 | – | – | ||
 | 7490220123 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. | 8 files | WE-LAN LAN Transformer | – | – | 500 | – | – | 180 | – | – | 1000 Base-T | 1 | 4PPoE (up to 1500 mA) | No | -40 °C up to +105 °C | 1500 | SMT | 180 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 74439346056 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | |
| 744272471 | SPEC | |
| 7490220123 | SPEC PCN pendingDue to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff. |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | IRP,40K (A) | ISAT,30% (A) | RDC (mΩ) | fres (MHz) | Number of windings | L1 (µH) | Zmax (Ω) | VR (V) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT (V (AC)) | Mount | L (µH) | Samples |
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