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Power over Ethernet - IEEE 802.3af compliant PD converter with 3.3V, 3A output

STEVAL-TSP006V2

Overview

This document focuses on a reference design for a simple, low cost 3.3 V 3 A flyback converter based on the PM8800A device.

The PM8800A is a highly integrated device embedding an IEEE 802.3af compliant “Powered Device” (PD) interface together with a PWM controller.
It can be successfully used in all low power, low cost PoE applications.

Main features

IEEE 802.3af compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Line input voltage range: 40 Vdc to 60 Vdc, output voltage: 3.3 Vdc ± 5%
Output current: 3 A
Peak-to-peak output ripple: 30 mV
Efficiency DC-DC full-load: > 83%
Efficiency overall peak: > 80%
Transient response ΔVout_pk-pkto 50% load step: pp
ΔV in load line case:

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-05-07 15:26:03

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