background image

8

dc1814afe

DEMO MANUAL

DC1814A

schematic Diagram

5

5

4

4

3

3

2

2

1

1

D

D

C

C

B

B

A

A

DATA AND POWER OUT

VEE

AGND

MAIN PS INPUTS

(+)

(-)

(55V TO 57V)

DATA IN

CSRN2512FKR250

RESET

SHDN

MMSZ4686T1

1/4W

1

VDD

DGND

TP2

TP1

SDA

SCL

ASSEMBLY VERSION      -WATT PSE                     U1

-A                                  38.7W                  LTC4274AIUHF-1 

-B                                  52.7W                  LTC4274AIUHF-2

-C                                  70W                     LTC4274AIUHF-3

-D                                  90W                     LTC4274AIUHF-4 

 MPZ2012S102A

 MPZ2012S102A

FBMH4532HM132-T

NOTE: FOR TEMPERATURE SENSITIVE 90W  APPLICATIONS, TWO OF THE 749012013 MAY BE USED AS AN ALTERNATE  TO T1 WHICH HAS A  HIGHER CURRENT RATING

VPORT +

VPORT -

PRODUCTION

DILIAN R.

4/29/11

_

2.  INSTALL SHUNTS AS SHOWN.

1.  ALL RESISTORS ARE IN OHMS, 0603.      ALL CAPACITORS ARE IN MICROFARADS, 0603.

NOTE: UNLESS OTHERWISE SPECIFIED

TM

 MPZ2012S102A

FB1, FB2, FB3, FB4

SEE TABLE

SEE TABLE

1a

_

POWER LEVEL UPDATE

DILIAN R.

9/26/11

T1: WURTH 749022016       COILCRAFT ETH1-460L

1b

_

T1 OPTION

DILIAN R.

3/28/13

FOR HIGH SURGE ENVIRONMENTS

ADD A 10 OHM, 0805 RESISTOR

AT THIS LOCATION

1c

SURGE RESISTOR

DILIAN R.

12/8/15

VEE

VEE

REVISION HISTORY

DESCRIPTION

DATE

APPROVED

ECO

REV

REVISION HISTORY

DESCRIPTION

DATE

APPROVED

ECO

REV

REVISION HISTORY

DESCRIPTION

DATE

APPROVED

ECO

REV

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

Tuesday, December 08, 2015

11

SINGLE PORT LTPoE++      PSE CONTROLLER

JK

DILIAN R.

N/A

LTC4274AIUHF FAMILY

DEMO CIRCUIT 1814A

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

Tuesday, December 08, 2015

11

SINGLE PORT LTPoE++      PSE CONTROLLER

JK

DILIAN R.

N/A

LTC4274AIUHF FAMILY

DEMO CIRCUIT 1814A

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

Tuesday, December 08, 2015

11

SINGLE PORT LTPoE++      PSE CONTROLLER

JK

DILIAN R.

N/A

LTC4274AIUHF FAMILY

DEMO CIRCUIT 1814A

FB3

R6 10K

E2

RT4

75

J2

SS-7188S-A-NF

1 2 3 4 5 6 7 8

9

10

CT2

0.01uF

100V

0805

R2 75

E3

C5 0.22uF

100V

D23 5.6V

1

3

D1 3.9V

C3

1000pF

2kV

U1

LTC4274AIUHF

SDAOUT

1

SDAIN

3

SCL

38

AD0

7

AD1

6

AD2

5

AD3

4

AGND

18

VEE

19

VEE

22

VEE

25

VEE

26

VEE

27

VEE

39

SE

NS

E

30

GATE

31

OUT

32

INT

37

SH

DN

14

DGND

17

DGND

16

DGND

15

DGND

10

VDD

13

AUTO

33

MID

36

RE

SE

T

35

MSD

34

NC

2

NC

11

NC

12

NC

20

NC

21

NC

23

NC

24

NC

28

NC

29

DNC

8

NC

9

R5

100K

F8

3A, 1206

C1Q 3

J4

J3

RT1

75

SMAJ58A

D3

C4 1.0uF

100V

F10

3A, 1206

C1Q 3

RS1

0.25

D5 S1B

FB2

R7 10K

E4

R11 1.0K

CT3

0.01uF

100V

0805

R10

1

F7

3A, 1206

C1Q 3

CT1

0.01uF

100V

0805

SMBJ64A

D2

F9

3A, 1206

C1Q 3

R4 75

RT3

75

R9

10K

C6

1000pF

2kV

T1

2

22

3

24

23

1

5

4

6

8

7

9

11

10

12

20

21

19

17

18

16

14

15

13

Q2 CMPTA92

FB1

D4

S1B

E1

R8

10K

Q1

FDMC86102

C1

0.1uF

+

C2

4.7uF

63V

J1

SS-7188S-A-NF

1 2 3 4 5 6 7 8

9

10

SW1

1

2

SW2

1

2

CT4

0.01uF

100V

0805

R1 75

R3 75

RT2

75

FB4

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Содержание 1814A

Страница 1: ...inear logo are registered trademarks of Linear Technology Corporation All other trademarks are the property of their respective owners The LTC4274A is configured in the DC1814A as an AUTO pinhigh MIDp...

Страница 2: ...below 1 Connect a 55V to 57V power supply across AGND and VEE Size the power supply considering the maximum power delivered to the PD 2 Connectan802 3Type1orType2 orLTPoE compat ible PD to RJ45 conne...

Страница 3: ...ent readings ThesenseresistorusedwiththeLTC4274Amust be 0 25 1 or better and with a power rating that can handle the maximum DC current passed through it A dedicatedsensetracefromtheSENSEpinoftheLTC42...

Страница 4: ...thernet ports can be subject to significant cable surge events TokeepPoEvoltagesbelowasafelevelandprotect the application against damage protection components are required at the main supply at the LT...

Страница 5: ...VEE TVSBULK C4 1 F 100V OUT VEE DC1814A F05 C5 0 22 F 100V Q1 FDMC86102 RS1 0 25 CSRN2512FKR250 D3 SMAJ58A 18 22 19 25 26 27 39 30 31 32 D4 S1B D5 S1B D1 3 9V MMSZ4686T1 R11 1k 1 4W Figure 5 High Surg...

Страница 6: ...1 Top Layer Top Silkscreen Layer 2 VIN 1 Layer 3 VIN 2 Layer 4 Bottom Layer Bottom Silkscreen Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 7: ...1 RS1 RES 2512 0 25 1 2W STACKPOLE CSRN2512FKR250 22 4 MH1 MH4 STAND OFF NYLON 0 75 KEYSTONE 8834 SNAP ON 23 2 SW1 SW2 SWITCH MOMENTARY PUSHBUTTON W RTH 434 123 050 816 24 1 Q1 XSTR MOSFET N CHANNEL...

Страница 8: ...HE 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 R...

Страница 9: ...Corporation makes no representa tion that the interconnection of its circuits as described herein will not infringe on existing patent rights Assembly Drawing Downloaded from Arrow com Downloaded fro...

Страница 10: ...Y 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...

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