
8
dc1814afd
DEMO MANUAL
DC1814A
schematic Diagram
5
4
3
2
1
D
C
B
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
VEE
VEE
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
REVISION HISTORY
DESCRIPTION DATEAPPROVEDECO REV
SIZE
DATE:
.VER.ONCI
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
Thursday, March 28, 2013
1 1
SINGLE PORT LTPoE++ PSE CONTROLLER
JK
DILIAN R.
N/A
LTC4274AIUHF FAMILY
DEMO CIRCUIT 1814A
SIZE
DATE:
.VER.ONCI
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
Thursday, March 28, 2013
1 1
SINGLE PORT LTPoE++ PSE CONTROLLER
JK
DILIAN R.
N/A
LTC4274AIUHF FAMILY
DEMO CIRCUIT 1814A
SIZE
DATE:
.VER.ONCI
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
Thursday, March 28, 2013
1 1
SINGLE PORT LTPoE++ PSE CONTROLLER
JK
DILIAN R.
N/A
LTC4274AIUHF FAMILY
DEMO CIRCUIT 1814A
RT3
75
RT3
75
R2
75
R2
75
D23
5.6V
D23
5.6V
1 3
J3J3
C1
0.1uF
C1
0.1uF
Q2
CMPTA92
Q2
CMPTA92
FB3FB3
F10
3A, 1206
C1Q 3
F10
3A, 1206
C1Q 3
R1
75
R1
75
RT1
75
RT1
75
CT3 0.01uF
100V
0805
CT3 0.01uF
100V
0805
RS1 0.25
RS1 0.25
D5
S1B
D5
S1B
R10
1
R10
1
SW2SW2
1 2
FB2FB2
D1
3.9V
D1
3.9V
C3
1000pF
2kV
C3
1000pF
2kV
RT4
75
RT4
75
SMAJ58A
D3
SMAJ58A
D3
FB1FB1
D4
S1B
D4
S1B
U1
LTC4274AIUHF
U1
LTC4274AIUHF
SDAOUT 1
SDAIN3
SCL 38
AD0 7
AD1 6
AD2 5
AD3 4
AGND
18
VEE
19
VEE
22
VEE
25
VEE
26
VEE
27
VEE
39
SENSE
30
GATE
31
OUT
32
INT37
SHDN 14
DGND
17 DGND
16 DGND
15 DGND
10
VDD
13
AUTO
33
MID
36
RESET35
MSD 34
NC 2
NC 11
NC 12
NC 20
NC 21
NC 23
NC 24
NC 28
NC 29
DNC 8
NC 9
CT4 0.01uF
100V
0805
CT4 0.01uF
100V
0805
E3E3
R9
10K
R9
10K
F7
3A, 1206
C1Q 3
F7
3A, 1206
C1Q 3
C6
1000pF
2kV
C6
1000pF
2kV
T1T1
2
223
24
23
1
5
4
6
8
7
9
11
10
12
20
21
19
17
18
16
14
15
13
CT1 0.01uF
100V
0805
CT1 0.01uF
100V
0805
R7
10K
R7
10K
+
C2
4.7uF
63V
+
C2
4.7uF
63V
E1E1
SMBJ64A
D2
SMBJ64A
D2
Q1
FDMC86102
Q1
FDMC86102
R8
10K
R8
10K
R5
100K
R5
100K
R6
10K
R6
10K
E2E2
F9
3A, 1206
C1Q 3
F9
3A, 1206
C1Q 3
E4E4
J1
SS-7188S-A-NF
J1
SS-7188S-A-NF
1
2
3
4
5
6
7
8
9
10
F8
3A, 1206
C1Q 3
F8
3A, 1206
C1Q 3
J4J4
R3
75
R3
75
J2
SS-7188S-A-NF
J2
SS-7188S-A-NF
1
2
3
4
5
6
7
8
9
10
RT2
75
RT2
75
R4
75
R4
75
CT2 0.01uF
100V
0805
CT2 0.01uF
100V
0805
FB4FB4
R11
1.0K
R11
1.0K
C4
1.0uF
100V
C4
1.0uF
100V
C5
0.22uF
100V
C5
0.22uF
100V
SW1SW1
1 2