Key facts
- Brand
- Fairchild
- Model
- FDMQ8203
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-12
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Fairchild FDMQ8203 GreenBridge Application Note for PoE Diode Bridge Replacement
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.
Read onlineFairchild FDMQ8203 specifications
| Drain to Source Voltage (N-Channel) | 100 V |
|---|---|
| Drain Current Continuous (Silicon limited) N-Channel | 10 A |
| Drain to Source Voltage (P-Channel) | -80 V |
| Drain Current Continuous (Silicon limited) P-Channel | -10 A |
| Operating and Storage Junction Temperature Range | -55 to +150 °C |
| Thermal Resistance Junction to Ambient (Pad 2 oz copper) | 160 °C/W |
All Fairchild FDMQ8203 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
How does the GreenBridge solution improve efficiency compared to a diode bridge?
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.
From: Fairchild FDMQ8203 GreenBridge Application Note for PoE Diode Bridge Replacement
Does the GreenBridge interfere with PoE resistance detection?
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.
From: Fairchild FDMQ8203 GreenBridge Application Note for PoE Diode Bridge Replacement
What is the maximum continuous drain current for this device at 25°C?
The maximum continuous drain current limited by the package is 6 A.
What are the operating and storage junction temperature ranges?
The device operates and stores between -55 °C and +150 °C.