Linear Technology DC1366B Manual

Description
Demonstration circuit DC1366B features the
quad network power controller with I
for use in IEEE 802.3at compliant Power Sourcing Equip-
ment (PSE). Integrated into a tiny 5mm × 7mm 38-pin
QFN package are four independent channels controlling
external N-channel power MOSFETs. Each port features:
Reliable 4-Point PD Detection
n
Selectable 1 or 2-Event Classification
n
Inrush Current Limiting
n
Extremely Fast Short-Circuit Protection with Program-
n
mable Foldback Current Threshold
Programmable Cutoff Current Threshold for Class
n
Power Enforcement
Voltage and Current Readback
n
DC Disconnect Sensing
n
LTC 4266, a
®
2
C interface, designed
®
DC1366B
DEMO MANUAL DC1366B
IEEE 802.3at PoE
Quad PSE Controller
The DC1366B is configured like a midspan PSE with two
RJ45 connectors for each port such that gigabit Ethernet
data can pass through the board at full line rates while
DC power is injected by the LTC4266 on the OUT TO PD
side of the board.
Often one of the most challenging aspects of designing a
PSE system is the power management software; Linear
Technology makes the job easier with the fully-featured
LTC4266 register set and a QuikEval™ GUI software ap-
plication. The GUI allows the user full and easy access to
the LTC4266 register set with detailed contextual help info.
LTC4266 example software is available only under a non-
disclosure agreement (NDA).
The DC1366B has increased surge protection and more
compact Hot Swap™ MOSFETs over the DC1366A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1366B
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot
Swap and QuikEval are trademarks of Linear Technology Corporation. All other trademarks are
the property of their respective owners.
LTC4266
dc1366bf
1