STMicroelectronics PM8804 | Demoboard STEVAL-POE002V1

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

• Datasheet
• IC product information