Fairchild’s GreenBridge™ solution reduces power losses in the bridge circuit and leads to an efficient and cost-effective PoE system.
The document introduces the Fairchild Semiconductor GreenBridge™ solution, specifically the FDMQ8203 model, designed to replace traditional diode bridge circuits in Power over Ethernet (PoE) systems. By integrating dual P-channel and N-channel MOSFETs into a compact MLP 4.5x5mm package, this device reduces conduction loss caused by forward voltage drops found in standard diodes.
| Package Type | MLP 4.5x5mm |
|---|---|
| Max Output Power (Tested) | 25W |
It reduces conduction loss by replacing the forward voltage drop of diodes with the lower RDS(on) of MOSFETs, saving approximately 0.82W at 25W output power.
No, the recommended self-driven gate circuit ensures the device stays turned off during the 2.7V and 10.1V detection voltages to prevent failure.