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DEMO MANUAL 

DC2685B-KIT

Rev. B

DESCRIPTION

DC2683A and DC2684A-B

LTC4291-1/LTC4292

4-Port IEEE 802.3bt PSE

Demonstration circuit 2685B-KIT is an Ethernet Alliance 

Gen 2 PoE certified 4-port IEEE 802.3bt power sourcing 

equipment (PSE) composed of a DC2684A-B (daugh-

ter card) and DC2683A (motherboard). 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 

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

BOARD PHOTO

and powered from this system using a single power sup-

ply. A DC590 is connected to the DC2685B-KITfor I

2

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.

Содержание DC2685B-KIT

Страница 1: ...1 LTC4292 PSE chipset Up to four IEEE 802 3af IEEE 802 3at or IEEE 802 3bt powered devices PDs can be connected All registered trademarks and trademarks are the property of their respective owners BO...

Страница 2: ...ther 5 Connect a supply to the motherboard with the pos itive 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 four...

Страница 3: ...3 DEMO MANUAL DC2685B KIT Rev B 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...

Страница 4: ...s powered Table 3 DC2685B KIT 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 KIT Address Settings SW3 ADDRESS AD3 AD2 LO LO...

Страница 5: ...84A 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 chipse...

Страница 6: ...d 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...

Страница 7: ...rrect 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 pa...

Страница 8: ...NOT 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 S...

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

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

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

Страница 12: ...12 DEMO MANUAL DC2685B KIT Rev B DC2683A MOTHER BOARD LAYOUT FILES Figure 13 DC2683A Top Silkscreen...

Страница 13: ...13 DEMO MANUAL DC2685B KIT Rev B DC2683A MOTHER BOARD LAYOUT FILES Figure 14 DC2683A Top Layer...

Страница 14: ...14 DEMO MANUAL DC2685B KIT Rev B Figure 15 DC2683A Inner Layer 2 DC2683A MOTHER BOARD LAYOUT FILES...

Страница 15: ...15 DEMO MANUAL DC2685B KIT Rev B Figure 16 DC2683A Inner Layer 3 DC2683A MOTHER BOARD LAYOUT FILES...

Страница 16: ...16 DEMO MANUAL DC2685B KIT Rev B Figure 17 DC2683A Bottom Layer DC2683A MOTHER BOARD LAYOUT FILES...

Страница 17: ...17 DEMO MANUAL DC2685B KIT Rev B Figure 18 DC2683A Bottom Silkscreen DC2683A MOTHER BOARD LAYOUT FILES...

Страница 18: ...ALS 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 REL...

Страница 19: ...STANCE 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 3b...

Страница 20: ...ADI 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 CIRCUI...

Страница 21: ...MER 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 RELIABILI...

Страница 22: ...ot 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 pr...

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