DC2046A-A datasheet, PDF - EEWORLD Datasheet

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DC2046A-A: DescriptionDEV BOARD FOR LT4276B/LT4321; CategoryDevelopment board/suite/development tools; File Size217KB，10 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html; Environmental Compliance

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DC2046A-A Overview

DEV BOARD FOR LT4276B/LT4321

DC2046A-A Parametric

Parameter Name	Attribute value
type	Power management
Function	Power over Ethernet (PoE)
Embedded	no
IC/parts used	LT4276B，LT4321
Main attributes	-
What's included	plate
Auxiliary properties	-

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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1366A

IEEE802.3AF/AT POWER-OVER-ETHERNET POWER SOURCING EQUIPMENT CONTROLLER

LTC4266

DESCRIPTION

Demonstration circuit DC1366A features the

LTC

4266CUHF, a quad network power controller with

C™ interface, designed for use in IEEE 802.3at™-

compliant Power Sourcing Equipment (PSE). Inte-

grated into a tiny 5mm×7mm 38-pin QFN package are

four independent ports controlling external N-channel

power MOSFETs. Each port features:

■

Reliable 4-point PD detection

■

Selectable 1 or 2-event classification

■

Inrush current limiting

■

Extremely fast short-circuit protection with

programmable foldback current threshold

■

Programmable cutoff current threshold for

class power enforcement

■

Voltage and current readback

■

DC disconnect sensing

The DC1366A board 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 PD side of the board.

Often one of the most challenging aspects of de-

signing a PSE system is the power management

software; Linear Technology makes the job easier

with the fully-featured LTC4266 register set and an

advanced GUI software application. The GUI allows

the user full and easy access to the LTC4266 regis-

ter set with detailed contextual help info. The GUI

also includes a host computer emulator to demon-

strate basic power management techniques: the

user selects various system parameters such as PSE

type (endspan or midspan), 1 or 2-event classifica-

tion, total system power budget, and fault handling

rules; then with the click of a button the host com-

puter emulator takes control of the system, manag-

ing the power budget as PDs are connected and dis-

connected, and logging all events.

The DC1366A demo boards, CAD files, and GUI soft-

ware are available only under a non-disclosure

agreement (NDA).

Contact your local Linear Tech-

nology sales person or field applications engineer.

LT, LTC, and QuickEval are trademarks of Linear Technology

Corporation; I2C is a trademark of Phillips Electronics N.V.; all other

trademarks are the property of their respective owners.

QUICK START PROCEDURE

Figure 1 shows the basic setup. The LTC4266 requires

two power supply rails: V

(nominally 3.3V) and V

(nominally -54V). The V

supply can be provided by

the DC590B board or an external bench supply.

When running the GUI application on a Windows

computer, the DC590B board from Linear Tech is

used to interface a USB port on the PC to the I

C bus

on the DC1366A board. The DC590B also provides

optoisolation of the I

C bus, and an isolated 3.3V

supply to run the LTC4266 chip; the user need only

provide the V

supply.

Alternatively, the user can omit the DC590B and

connect some other I

C master device to the

DC1366A board. If the DC590B is omitted then a

bench power supply must provide V

For applications where power management is not

required, the LTC4266 features an AUTO mode al-

lowing it to operate completely autonomously.

Choose one of the setup procedures shown on the next

page, depending on whether or not the GUI application

software is required.

DC2046A-A Related Products

	DC2046A-A	DC1366A	DC2046A-B	DC2046A-C	DC2046A-D	DC2046A-F
Description	DEV BOARD FOR LT4276B/LT4321	eval board for ltc4266	DEV BOARD FOR LT4276B/LT4321	DEV BOARD FOR LT4276B/LT4321	DEV BOARD FOR LT4276B/LT4321	DEV BOARD FOR LT4276C/LT4321
type	Power management	-	Power management	Power management	Power management	Power management
Function	Power over Ethernet (PoE)	-	Power over Ethernet (PoE)	Power over Ethernet (PoE)	Power over Ethernet (PoE)	Power over Ethernet (PoE)
Embedded	no	-	no	no	no	no
IC/parts used	LT4276B，LT4321	-	LT4276B，LT4321	LT4276B，LT4321	LT4276B，LT4321	LT4276C，LT4321
What's included	plate	-	plate	plate	plate	plate

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