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dc1843bfa

DEMO MANUAL DC1843B

DC1842B SCHEMATIC DIAGRAM

5

5

4

4

3

3

2

2

1

1

D

D

C

C

B

B

A

A

2KV

1. ALL SENSE RESISTORS TIE TO VEE AT ONE COMMON POINT. 2. VSSK CONNECTS TO THE COMMON SENSE RESISTOR VEE POINT THROUGH AN ISOLATED KELVIN SENSE TRACE. 3. ONE S1B PROTECTION DIODE FROM VEE TO OUTn AND ONE S1B  PROTECTION DIODE FROM OUTn TO AGND SHOWN ON MOTHER BOARD. 4. ALL RESISTORS AND CAPACITORS ARE 0603. 5. OPTIONAL REPLACE R1- R8 WITH 10 OHMS AND D68 - D75 WITH  BAT41JFILM FOR INCREASED SURGE PROTECTION.

NOTE: UNLESS OTHERWISE SPECIFIED

AUTO

HI LO

HI LO

MID

1808

GP1

GP0

XIO1 XIO0

AD1

AD0

AUTO

MID

NOTE 1, 2

RC1-RC4

4 X 1.00

RB1-RB4

4 X 1.00

RA1-RA4

4 X 1.00

4 X 1.00

4 X 1.00

4 X 1.00

RD1-RD4

RE1-RE4

RF1-RF4

RG1-RG4

4 X 1.00

RH1-RH5

4 X 1.00

100V 0805

100V 0805

100V 0805

0805

100V

100V 0805

100V 0805

100V 0805

100V 0805

OPT

OPT

OPT

OPT

OPT

OPT

OPT

OPT

OPT

OPT

NOTE 5

VEE

        REQUIRED SURGE    COMPONENTS (BULK 58V  TVS and BULK CAPACITANCE)        ON MOTHER BOARD.

S1B

S1B

OUTn

VEE

REQUIRED S1B DIODE PROTECTION        SHOWN ON MOTHER BOARD.                       See NOTE 3

OUT5

G5

OUT2

G6

OUT1

G1

S2

MSD#

RESET#

OUT7

S3

S1

AD3

AD2

AD6

SDAIN SCL INT#

SDAOUT

AD3

MSD#

AD2

AD6

SDAOUT

RESET#

INT#

SDAIN

SCL

OUT2

OUT1

OUT7 OUT8

OUT4

OUT3

OUT5 OUT6

G2

G3

G4

G8

G7

OUT3

OUT8

OUT4

OUT6

O3

O1

O4

O2

O5

O6

O7

O8

S8

S5

S7

S4

S6

VEE

VEE

VEE

VDD33

VDD33

VDD33

VEE

VEE

VEE

VEE

VEE

VEE

VEE

VEE

VEE

VEE

VEE

REVISION HISTORY

DESCRIPTION

DATE

APPROVED

ECO

REV

DILIAN R.

REBUILD WITH CHANGE

1

08-18-15

__

REVISION HISTORY

DESCRIPTION

DATE

APPROVED

ECO

REV

DILIAN R.

REBUILD WITH CHANGE

1

08-18-15

__

REVISION HISTORY

DESCRIPTION

DATE

APPROVED

ECO

REV

DILIAN R.

REBUILD WITH CHANGE

1

08-18-15

__

SIZE

DATE:

IC NO.

REV.

SHEET

OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035 Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY 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 OPERATION IN THE ACTUAL APPLICATION.  COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.  CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

1

11

8-PORT PSE DAUGHTER CARD WITH DIGITAL ISOLATION

KIM T.

DILIAN R.

N/A

LTC4290BIUJ, LTC4271IUF

DEMO CIRCUIT 1842B

Tuesday, August 18, 2015

SIZE

DATE:

IC NO.

REV.

SHEET

OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035 Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY 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 OPERATION IN THE ACTUAL APPLICATION.  COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.  CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

1

11

8-PORT PSE DAUGHTER CARD WITH DIGITAL ISOLATION

KIM T.

DILIAN R.

N/A

LTC4290BIUJ, LTC4271IUF

DEMO CIRCUIT 1842B

Tuesday, August 18, 2015

SIZE

DATE:

IC NO.

REV.

SHEET

OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGY

Fax: (408)434-0507

Milpitas, CA 95035 Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY 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 OPERATION IN THE ACTUAL APPLICATION.  COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY.  CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

SCALE = NONE

www.linear.com

1

11

8-PORT PSE DAUGHTER CARD WITH DIGITAL ISOLATION

KIM T.

DILIAN R.

N/A

LTC4290BIUJ, LTC4271IUF

DEMO CIRCUIT 1842B

Tuesday, August 18, 2015

1

2

D70

Q7

PSMN075-100MSE

Q13A

BC846AS

2

6

1

G8

J2-6

C7

0.22uF X7R

C20 1uF

C3

0.22uF X7R

R26 OPT

R30 27k 0805

1206 1/2W

12k

R34

JP2

1

2

3

Q2

PSMN075-100MSE

C25 0.1uF

C19 1uF 100V 1206

J2-1

G3

D4 GRN XIO1

1

2

1

2

D75

C1

0.22uF X7R

R15

100

C2

0.22uF X7R

C22 1uF

Q6

PSMN075-100MSE

G4

J2-2

R21

100

U2

LTC4290

VEE

1

AGND

25

OUT4

10

GAT

E4

9

SENSE4

15

SENSE3

14

GAT

E3

7

OUT3

8

SENSE2

13

GAT

E2

4

OUT2

5

SENSE1

12

GAT

E1

2

OUT1

3

VEE

30

NC

35

CPA

39

CNA

38

DPA

37

DNA

36

VEE

40

VSSK

41

SENSE5

16

GAT

E5

22

OUT5

21

SENSE6

17

GAT

E6

24

OUT6

23

SENSE7

18

GAT

E7

27

OUT7

26

SENSE8

19

GAT

E8

29

OUT8

28

NC

31

XIO1

20

XIO0

11

CAP2

6

NC

34

NC

32

VEE

33

R5 0

1

2

D1

SMAJ58A

1

2

D68

Q1

PSMN075-100MSE

C23 1uF

R4 0

C5

0.22uF X7R

R23

100

D2 GRN GP1

1

2

G7

R33 220k

C21 0.1uF

R35

10 0805

R9

0

C24 2.2nF

R28 560

T1

WURTH, 7490100143

TD+

1

CT

2

TD-

3

N/C

4

N/C

5

RD+

6

CT(3

)

7

RD-

8

RX-

9

CT(4

)

10

RX+

11

N/C

12

N/C

13

TX-

14

CT(2

)

15

TX+

16

C4

0.22uF X7R

G1

Q4

PSMN075-100MSE

R29 560

R2 0

C26

0.1uF

R8 0

Q8

PSMN075-100MSE

1

2

D72

Q13B BC846AS

5

3

4

D3 GRN GP0

1

2

J2-3

1

2

D71

J2-9

C8

0.22uF X7R

J2-10

Q3

PSMN075-100MSE

1

2

D26 B1100

R31 27k 0805

G6

D5 GRN XIO0

1

2

1

2

D73

JP1

1

2

3

R14

100

J2-5

R1 0

R32 220k

R16

100

R27 OPT

G5

R22

100

U1

LTC4271

AD0

1

AD1

2

AD2

3

AD3

4

SCL

18

SDAIN

17

SDA

OUT

16

INT

15

VDD33

20

AUTO

21

MID

6

RESET

14

MSD

24

AD6

5

NC

7

CND

9

DPD

10

CPD

8

DND

11

VDD33

12

DGND

25

CAP1

19

DNC

13

GP1

22

GP0

23

D31

BZT52C5V6-7-F

R13

100

J2-4

R24

100

1

2

D69

R3 0

R6 0

1

2

D74

Q5

PSMN075-100MSE

R11 0

R10

0

R7 0

G2

C6

0.22uF X7R

2mm, 30 

PIN 

CONNECT

OR

J1

7

7

1

1

3

3

5

5

9

9

11

11

13

13

15

15

17

17

19

19

21

21

25

25

27

27

29

29

23

23

2

2

4

4

6

6

8

8

10

10

12

12

14

14

16

16

18

18

20

20

22

22

24

24

26

26

28

28

30

30

Содержание DC1680B

Страница 1: ...manual provides a Quick Start Procedure a DC1842B overview a DC1680B overview schematics and layout printouts Refer to the Layout Guide for Demonstration Circuit 1842B when L LT LTC LTM Linear Technology and the Linear logo are registered trademarks and QuikEval is a trademark of Linear Technology Corporation All other trademarks are the property of their respective owners BOARD PHOTO laying out t...

Страница 2: ... jumper JP1 to HI Figure 1 to enable AUTO pin mode 2 On the DC1842B set MID jumper JP2 to LO Figure 1 to disable midspan mode 3 Alignpin1ofthe30 pinmaleconnectorontheDC1842B with pin 1 of the 30 pin female connector on the DC1680B Figure2 Pin12ispolarizedtoassistwiththe alignment Carefully push the DC1842B straight down untilthetwo30 pinconnectorsareflushwitheachother 4 On the DC1680B connect a su...

Страница 3: ...3 dc1843bfa DEMO MANUAL DC1843B QUICK START PROCEDURE Figure 3 DC1843B Basic Setup Figure 4 DC1843 System Setup with the DC590 DC1680 DC1842 and 51V to 57V Power Supply ...

Страница 4: ...ed power management features in the LTC4290B LTC4271 chipset include per port 12 bit current monitor ing ADCs DAC programmable current limit and versatile quick shutdown of preselected ports PD discovery uses a proprietarydualmode4 pointdetectionmechanismensur ing excellent immunity from false PD detection Midspan PSEs are supported with 2 event classification and a two second backoff timer The LT...

Страница 5: ...ides communication across an isolation barrier through a data transformer Figure 6 This eliminates the need for expensive opto couplers All digital pins reside on the digital ground refer ence and are isolated from the analog PoE supply A 3 3V supply for VDD and an isolated VEE supply are connected to the DC1842B through the 30 pin connector VDD33 VDD33 T1 DND CPD CND DPD AGND VEE DNA VEE VEE ISOL...

Страница 6: ... the states of the LTC4290B LTC4271 chipset general purpose input outputpins Thesepinsareconfiguredasinputsoroutputs via I2C GP1 and GP0 are referenced to DGND and driven by the LTC4271 when set as outputs Figure 8 XIO0 and XIO1arereferencedtoVEE andaredrivenbytheLTC4290B when set as outputs Figure 9 J2 provides test points for access to these I Os Figure 8 DC1842B LTC4290B General Purpose I O LED...

Страница 7: ...n be subject to significant cable surge events TokeepPoEvoltagesbelowasafelevelandprotect the application against damage protection components as shown in Figure 11 are required at the main supply at the LTC4270 supply pins and at each port Bulk transient voltage suppression TVSBULK and bulk capacitance CBULK are required across the main PoE supply and should be sized to accommodate system level s...

Страница 8: ...re 3 Test points for port outputs OUT1 through OUT8 are provided 8 Port Configuration TheDC1680Bisconfiguredforan8 portPSEmotherboard for the DC1843B kit Four RJ45 dust caps at J3 and four dust caps at J4 are inserted to block off the four unused Ethernet ports Additional pegs are placed in the last 4 pins of connector J1 to block off the unused pins when the DC1842B daughter card is inserted DC16...

Страница 9: ...enheldinactivewithallportsoffandallinternalregisters reset to their power up states When SW1 is released RESETispulledhigh andthePSEbeginsnormaloperation PushbuttonswitchSW2whenpressedpullsthemaskable shutdown input MSD pin of the daughter card logic low Whenpressed allportsthathavetheircorrespondingmask bit set in the mconfig register of the PSE controller will be shutdown These ports must then b...

Страница 10: ...EDs Interrupt LED A red LED indicates when the INT line is pulled logic low by the daughter card When the interrupt is cleared high via I2C servicing the LED is turned off Port 1 Through 8 Power LED Indicators Each PSE port has a green LED indicator to show when PoE power is present at the port The LEDs are driven by the respective port OUT voltage ...

Страница 11: ... A power supply is connectedtoVEEwithbananacables TheDC590connects with a 14 pin ribbon cable to the DC1680B and to a PC via USB On the PC a GUI communicates with the board At the PSE output PDs are connected A sample PD demo board is shown in Figure 14 Table 2 DC1843 Kit Versions VERSION FEATURES DC1843A DC1680A Motherboard with Integrated Magjack DC1842A 8 Port PSE Daughter Card DC1843B DC1680B ...

Страница 12: ...12 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B LAYOUT Top Assembly Layer 1 Top Layer ...

Страница 13: ...13 dc1843bfa DEMO MANUAL DC1843B Layer 2 VEE Plane 1 DEMONSTRATION CIRCUIT 1842B LAYOUT Layer 3 VEE Plane 2 ...

Страница 14: ...14 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1842B LAYOUT Layer 4 Bottom Layer Bottom Assembly ...

Страница 15: ...15 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Top Assembly ...

Страница 16: ...16 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 1 Top Layer ...

Страница 17: ...17 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 2 AGND CGND Plane 1 ...

Страница 18: ...18 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 3 SIG AGND CGND Plane 2 ...

Страница 19: ...19 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 4 SIG AGND CGND Plane 3 ...

Страница 20: ...20 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 5 SIG AGND CGND Plane 4 ...

Страница 21: ...21 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 6 Bottom Layer ...

Страница 22: ...22 dc1843bfa DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Bottom Assembly ...

Страница 23: ...RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 1 1 1 8 PORT PSE DAUGHTER CARD WITH DI...

Страница 24: ... SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY Fax 408 434 0507 Milpitas CA 95035 Phone 408 432 1900 1630 McCarthy Blvd LTC Confidential For Customer Use Only CUSTOMER NOTICE LINEAR TECHNOLOGY 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 OPERATION IN THE ACTUAL APPLICATION...

Страница 25: ...A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER 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 CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETA...

Страница 26: ... LTC Confidential For Customer Use Only CUSTOMER NOTICE LINEAR TECHNOLOGY 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 OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT ...

Страница 27: ...V SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY Fax 408 434 0507 Milpitas CA 95035 Phone 408 432 1900 1630 McCarthy Blvd LTC Confidential For Customer Use Only CUSTOMER NOTICE LINEAR TECHNOLOGY 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 OPERATION IN THE ACTUAL APPLICATIO...

Страница 28: ...INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use of the...

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