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Rev A

DEMO MANUAL DC2685B

DESCRIPTION

DC2683A and DC2684A-B

LTC4291-1/LTC4292

4-Port IEEE 802.3bt PSE

Demonstration circuit 2685B is a 4-port IEEE 802.3bt 

power sourcing equipment (PSE) composed of a 

DC2684A-B (daughter card) and DC2683A (mother-

board). The DC2685B (kit) is used for evaluation of 

the 

LTC

®

4291-1/LTC4292

 PSE chipset. Up to four 

IEEE 802.3af, IEEE 802.3at, or IEEE 802.3bt powered 

devices (PDs) can be connected and powered from this 

All registered trademarks and trademarks are the property of their respective owners.

BOARD PHOTO

system using a single power supply. A DC590 is con-

nected to the DC2685B for I

2

C interfacing with QuikEval™. 

This demonstration manual provides a quick start proce-

dure, a DC2684A-B daughter card overview, a DC2683A 

mother board overview, schematics, and layout printouts.

Design files for this circuit board are available.

Summary of Contents for LINEAR DC2683A

Page 1: ...Up to four IEEE 802 3af IEEE 802 3at or IEEE 802 3bt powered devices PDs can be connected and powered from this All registered trademarks and trademarks are the property of their respective owners BO...

Page 2: ...other 5 Connect a supply to the motherboard with the posi tive rail to AGND and negative rail to VEE as shown in Figure 3 Use a power supply capable of sourcing the maximum delivered power for all fou...

Page 3: ...3 Rev A DEMO MANUAL DC2685B QUICK START PROCEDURE Figure 1 DC2684A B Jumpers AUTO 4PV PM0 and PM1 Figure 2 Inserting the DC2684A B Daughter Card Into J7 of the DC2683A Motherboard...

Page 4: ...is powered Table 3 DC2685B Power Supply Voltage Range per PSE Type IEEE TYPE Supply Voltage Range Type 3 51V to 57V Type 4 53V to 57V Table 4 DC2685B Address Settings SW3 ADDRESS AD3 AD2 LO LO 20h LO...

Page 5: ...A B demonstrates proper LTC4291 1 LTC4292 board layout on a compact daughter card approximately the height and width of a 2 4 RJ45 connector Isolation and Power Supplies The LTC4291 1 LTC4292 chipset...

Page 6: ...R10 respectively This sets these two address bits low Address pins AD2 and AD3 are brought out to the 30 pin connector for con figuration on the motherboard See Figure 6 and Table 4 4PV Jumpers The 4P...

Page 7: ...ect before applying power LED Indicators VEE LED D5 and VDD LED D7 indicate if a voltage is present at these supplies Verify these LEDs are off before inserting or removing the daughter card Each pair...

Page 8: ...OT install jumper make no connections JP2 MODE Do NOT install jumper make no connections JP3 Watchdog Enables Do NOT install jumper make no connections JP4 EE Jumper MUST be in the EN position JP5 SW...

Page 9: ...9 Rev A DEMO MANUAL DC2685B DC2684A B DAUGHTER CARD LAYOUT FILES Figure 7 DC2684A B Top Silkscreen Figure 8 DC2684A B Top Layer...

Page 10: ...10 Rev A DEMO MANUAL DC2685B DC2684A B DAUGHTER CARD LAYOUT FILES Figure 9 DC2684A B Inner Layer 2 Figure 10 DC2684A B Inner Layer 3...

Page 11: ...11 Rev A DEMO MANUAL DC2685B DC2684A B DAUGHTER CARD LAYOUT FILES Figure 11 DC2684A B Bottom Layer Figure 12 DC2684A B Bottom Silkscreen...

Page 12: ...12 Rev A DEMO MANUAL DC2685B DC2683A MOTHER BOARD LAYOUT FILES Figure 13 DC2683A Top Silkscreen...

Page 13: ...13 Rev A DEMO MANUAL DC2685B DC2683A MOTHER BOARD LAYOUT FILES Figure 14 DC2683A Top Layer...

Page 14: ...14 Rev A DEMO MANUAL DC2685B Figure 15 DC2683A Inner Layer 2 DC2683A MOTHER BOARD LAYOUT FILES...

Page 15: ...15 Rev A DEMO MANUAL DC2685B Figure 16 DC2683A Inner Layer 3 DC2683A MOTHER BOARD LAYOUT FILES...

Page 16: ...16 Rev A DEMO MANUAL DC2685B Figure 17 DC2683A Bottom Layer DC2683A MOTHER BOARD LAYOUT FILES...

Page 17: ...17 Rev A DEMO MANUAL DC2685B Figure 18 DC2683A Bottom Silkscreen DC2683A MOTHER BOARD LAYOUT FILES...

Page 18: ...S PCB DES APP ENG CUSTOMER NOTICE ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIA...

Page 19: ...ANCE THIS CIRCUIT IS PROPRIETARY TO ADI AND SCHEMATIC SUPPLIED FOR USE WITH ADI PARTS SCALE NONE www linear com www analog com TEL 408 432 1900 MILPITAS CA 95035 1630 McCARTHY BLVD 2 2 2 IEEE 802 3bt...

Page 20: ...DI PARTS SCALE NONE www linear com www analog com TEL 408 432 1900 MILPITAS CA 95035 1630 McCARTHY BLVD 1 Tuesday March 06 2018 1 2 IEEE 802 3bt 4 PORT PSE MOTHERBOARD KIM T DILIAN R N A DEMO CIRCUIT...

Page 21: ...R S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY...

Page 22: ...disclose or transfer any portion of the Evaluation Board to any other party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promp...

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