DC1415A: 25.5W, 802.3at Type 2 Power Over Ethernet

Summary

Demonstration circuit DC1415A features the LTC4265CEDE, a third-generation Powered Device (PD) controller for Power-over-Ethernet (PoE) applications.

The LTC4265 is compliant to IEEE Standard 802.3at. It can handle up to 25.5 W and recognizes 2-event classification.

The LTC4265 includes the PD controller circuitry and power MOSFET integrated into a tiny 3mm x 4mm 12-pin DFN package.

The DC1415A board includes the entire front end of a typical PD; RJ45 connector, Ethernet magnetics, bridge rectifiers, surge prpotection, and PD controller, all in a 1” x 2” board. Two status indicators are also included: one shows the PSE is powering the PD; and the other shows the PSE performed 2-event classification. A small load sufficient to assure the PSE maintains power to the PD is also included.

The LTC4265 features complementary PWRGD and /PWRGD outputs to facilitate interface to a wide range of off-the-shelf DC/DC converters.

Simply connect the outputs of the DC1415A to the DC/DC converter that is right for your application. Linear Technology offers many DC/DC converter demo boards that can be used with the DC1415A.

Specifications

Manufacturer	Analog Devices Inc.
Category	Power Management
Sub-Category	POE - Power Over Ethernet
Eval Board Part Number	DC1415A-ND
Eval Board Supplier	Analog Devices Inc.
Eval Board	Normally In Stock
Compliance	IEEE 802.3at Type 2
Outputs and Type	1 Non-Isolated
Voltage Out
Current Out	40 mA
Voltage In	60 V (MAX)
Efficiency @ Conditions	- Not Given
Internal Switch	Yes
Features	Current Limit (Adj. or Fixed) Over Voltage Protection Power Good Output Shutdown, Enable, Standby Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency
Component Count + Extras	16 + 5
Application / Target Market	PoE, Power Over Ethernet RF: WLAN Access Points Security IP Camera VOIP Phones
Design Author	Linear Technology
Main I.C. Base Part	LTC4265
Date Created By Author	2008-03
Date Added To Library	2014-04