ON Semiconductor

FDMQ8205A
Demoboard FDMQ8205A4PPOE90WGEVB

GreenBridge™ for Power over Ethernet (PoE)

Topology: Forward
Input Voltage (min.): 42.70 V
Input Voltage (max.): 57.00 V
Output 1: 3.30 V / 27.000 A

Original publication on 2016-08-01, revision 1.0 on

Description

The GreenBridge™ FDMQ8205A evaluation board demonstrates the polarity protection bridge commonly used at the input of a Power over Ethernet (PoE) Power Device (PD). The protection bridge is used to protect the PD and make it insensitive to the polarity of a power source coupled to the PD. The PD itself may be sensitive to the polarity of the power source, but the bridge rectifier can be configured to provide the proper polarity to the device when the polarity of the power source is reversed. The GreenBridge™ can replace the conventional diode bridge and drastically reduce the power dissipation caused by the large voltage drop of a diode bridge, resulting in a high efficiency power device while not compromising the IEEE802.3at specification. The small package size of MLP4.5x5 reduces PCB area and increases power density.

Characteristics

  • Active MOSFET bridge with low forward drop to replace conventional diode bridge Self driving circuitry for MOSFETs Low rDS(on) 100V MOSFETs Maximizing available power and voltage IEEE802.3at complianto Does not compromise PoE detection and classificationo Small Backfeed voltage Works with 4-pair architecture for POE++ Enhanced thermal performance package of 4.5x5 mm MLP Wide operating voltage range up to 70 V

Products

  Order Code SPEC Product series xPxC Typ Montageart Anwendungssystem L
(µH)
n IR
(A)
RDC1 max
(mΩ)
RDC2 max
(Ω)
∫Udt
(µVs)
VT
(V (AC))
Samples
61500814221 PDF WR-MJ Modular Jack Horizontal Shielded 8P8C Tab Down 8P8C Horizontal THT CAT 3
749022016 PDF 10/100/1000 Base-T SMT Transformer
749251100 PDF WE-CST Current Sense Transformer 2000 1 : 100 10 6 5.5 50 500