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1

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.

Downloaded from

Arrow.com.

Summary of Contents for ANALOG DEVICES DC2685B

Page 1: ...EEE 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 sys...

Page 2: ...o 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 four ports set by JP3 and JP4...

Page 3: ...UICK 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 Downloaded from Arrow com Downloaded from Arrow c...

Page 4: ...ge 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 HI 24h HI LO 28h HI HI 2Ch Table 2 DC2684A B Auto M...

Page 5: ...ct daughter card approximately the height and width of a 2 4 RJ45 connector Isolation and Power Supplies The LTC4291 1 LTC4292 chipset provides communica tion across an isolation barrier through a dat...

Page 6: ...are brought out to the 30 pin connector for con figuration on the motherboard See Figure 6 and Table 4 4PV Jumpers The 4PVALID pin of the LTC4291 1 is set by the 4PV jumper JP2 on the DC2684A B See T...

Page 7: ...present at these supplies Verify these LEDs are off before inserting or removing the daughter card Each pairset channel 2 per port has a respective OUTnM LED to indicate if the channel is powered on...

Page 8: ...ables Do NOT install jumper make no connections JP4 EE Jumper MUST be in the EN position JP5 SW Right Hand Side MUST be in the ON position See Connections section ISO Left Hand Side Controls the isola...

Page 9: ...B Top Silkscreen Figure 8 DC2684A B Top Layer Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

Page 10: ...2 Figure 10 DC2684A B Inner Layer 3 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloa...

Page 11: ...2684A B Bottom Silkscreen Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Ar...

Page 12: ...ed from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Page 13: ...om Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from...

Page 14: ...ed from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Page 15: ...com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded fr...

Page 16: ...d from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com D...

Page 17: ...ow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Page 18: ...ATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT ADI APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETAR...

Page 19: ...LTC4291IUF LTC4292IUJ DEMO CIRCUIT 2684A Thursday August 02 2018 SIZE DATE IC NO REV SHEET OF TITLE APPROVALS PCB DES APP ENG CUSTOMER NOTICE ADI HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS...

Page 20: ...PP 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 RELIABLE OPERATI...

Page 21: ...RIETARY 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 1 Tuesday March 06 2018 2 2 IEEE 802 3bt 4 P...

Page 22: ...emble decompile or reverse engineer chips on the Evaluation Board Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board including but n...

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