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Fairchild Semiconductor Electronic Components Datasheet

FDMQ8205A Datasheet

High-Efficiency Bridge Rectifiers

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September 2016
FDMQ8205A
GreenBridgeTM 2 Series of High-Efficiency Bridge Rectifiers
Features
„ Low Power Loss GreenBridgeTM Replaces Diode Bridge
„ Self Driving Circuitry for MOSFETs
„ Low rDS(on) 100V Rated MOSFETs
„ Maximizing Available Power and Voltage
„ Eliminating Thermal Design Problems
„ IEEE802.3at Compatible
- Meet Detection and Classification Requirement
- Work with 2 and 4-pair Architecture
- Small Backfeed Voltage
„ Compact MLP 4.5x5 Package
Applications
„ Power over Ethernet (PoE) Power Device (PD)
- IP Phones
- Network Cameras
- Wireless Access Points
- Thin Clients
- Microcell
- Femtocell
General Description
FDMQ8205A is GreenBridgeTM2 series of quad MOSFETs for a
bridge application so that the input will be insensitive to the po-
larity of a power source coupled to the device. Many known
bridge rectifier circuits can be configured using typical diodes.
The conventional diode bridge has relatively high power loss that
is undesirable in many applications. Especially, Power over
Ethernet (PoE) Power Device (PD) application requires high-effi-
ciency bridges because it should be operated with the limited
power delivered from Power Source Equipment (PSE) which is
classified by IEEE802.3at. FDMQ8205A is configured with low
rDS(on) dual P-ch MOSFETs and N-ch MOSFETs so that it can re-
duce the power loss caused by the voltage drop, compared to the
conventional diode bridge. FDMQ8205A enables the application
to maximize the available power and voltage and to eliminate the
thermal design problems in PoE PD applications.
FDMQ8205A GreenBridgeTM2 is compatible with IEEE802.3at
PoE standard by not compromising detection and classification
requirement as well as small backfeed voltage.
Package Marking and Ordering Information
Device Marking
FDMQ8205A
Device
FDMQ8205A
Package
MLP4.5x5
Reel Size
13 ”
Tape Width
12 mm
Quantity
3000 units
©2016 Fairchild Semiconductor Corporation
FDMQ8205A Rev.1.0
1
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FDMQ8205A Datasheet

High-Efficiency Bridge Rectifiers

No Preview Available !

Typical Application
  RJ45
C onnector
1
2
3
POU T
G3 G2
FD MQ8205A
IN PUT2
I NPU T1
G4 G1
6 N OU T
4
POU T
5
G3 G2
7 FDMQ8205A
IN PUT2
I NPU T1
8
G4 G1
N OU T
VO UT P
TVS 0.1u F PoE PD
I nt erface
22uF Is olated
D C/D C
C onver ter
VOU T+
VO U T-
VOU TN
Figure 1. Typical Application of Power Device for Power over Ethernet
Block Diagram
 
OUTP
Q3
G3 Gate
driver
OUTP
Q2
Gate
driv er
G2
Q4
Gate
G 4 driver
Q1
Gate
driv er
G1
OUTN
INPUT2
INPUT1
OUTN
Figure 2. Block Diagram
©2016 Fairchild Semiconductor Corporation
FDMQ8205A Rev.1.0
2
www.fairchildsemi.com


Part Number FDMQ8205A
Description High-Efficiency Bridge Rectifiers
Maker Fairchild Semiconductor
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FDMQ8205A Datasheet PDF






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