9
dc2541af
DEMO MANUAL DC2541A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
3. FOR TEMPERATURE SENSITIVE 90W APPLICATIONS, TWO OF THE 749012013 MAY BE USED AS AN ALTERNATE TO T1 WHICH HAS A HIGHER CURRENT RATING
MAIN PS INPUTS
2-PAIR
4-PAIR
(+)
(55V TO 57V)
TYPE 1 (13W)
T1: WURTH 749022016 COILCRAFT ETH1-460L
2. INSTALL SHUNTS AS SHOWN.
1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
DATA IN
TYPE 2 (25.5W) LTPoE++ 38.7W LTPoE++ 52.7W
DATA AND POWER OUT
LTPoE++ 70W
TYPE 1
TYPE 2
LTPoE++
DUA
LPD
LTPoE++ 90W
MAXIMUM PD INPUT POWER
TYPE 1 (13W)
TYPE 2 (25.5W)
LTPoE++ 38.7W LTPoE++ 52.7W
LTPoE++ 70W LTPoE++ 90W
EFFECTIVE R_PM
2.37k
3.32k
4.64k 5.90k
7.87k 10.0k
{
}
{
}
(-)
LEGACY
VPORT
+
LED
RESET_N
SENSE
MID
AGND_P
GATE
RESET_N
MID
DUALPD
LEGACY
PWRMODE
DATA2-
DUALPD
DATA2+
VPORT
-
AGND_P
PWRMODE
VEE
VEE
VEE
VEE
VEE
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
DILIAN R.
PRODUCTION
2
10-13-16
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
DILIAN R.
PRODUCTION
2
10-13-16
__
REVISION HISTORY
DESCRIPTION
DATE
APPROVED
ECO
REV
DILIAN R.
PRODUCTION
2
10-13-16
__
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
2
Thursday, October 13, 2016
11
SINGLE PORT PoE/PoE+/LTPoE++ PSE CONTROLLER
KIM T.
DILIAN R.
N/A
LTC4279IUFD
DEMO CIRCUIT 2541A
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
2
Thursday, October 13, 2016
11
SINGLE PORT PoE/PoE+/LTPoE++ PSE CONTROLLER
KIM T.
DILIAN R.
N/A
LTC4279IUFD
DEMO CIRCUIT 2541A
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
2
Thursday, October 13, 2016
11
SINGLE PORT PoE/PoE+/LTPoE++ PSE CONTROLLER
KIM T.
DILIAN R.
N/A
LTC4279IUFD
DEMO CIRCUIT 2541A
RM4
14.3k
J2
RJ45, WE-615008142621
1 2 3 4 5 6 7 8
9
10
E3
AGND
E5
DATA2+
CT3
0.01uF
0805
200V
C2 1000pF 2kV 1808
RX1
75
RM2
4.99k
C1 1000pF 2kV 1808
LED1
YELLOW
VEE
2
1
E1
VPORT+
RM3
8.66k
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
C3 2200pF
2kV 1812
RT1
75
C7 0.22uF 100V X7R 0805
R4 12k
1206
1/2W
RX4
75
RT3
75
JP5
HD1X3-079
LEGACY
HI
LO
1
3 2
CT1
0.01uF
0805
200V
RS1 0.1
1W 1206
U1 LTC4279
AGND
9
VEE
4
VSSK
5
VEE
21
SENSE
6
GATE
7
OUT
8
MID
19
RESET
18
LED
10
LEGACY
15
DNC
11
DUALPD
16
DNC
20
DNC
17
DNC
14
DNC
12
DNC
3
DNC
2
DNC
1
PWRMODE
13
SW1
RESET
1
2
X1
P1
C6 0.22uF
100V X7R 0805
D2
SMBJ58A
1
2
R3 12k
1206
1/2W
E6
DATA2-
JP1 HD1X3-079
PORT+
1
3
2
J1
RJ45, WE-615008142621
1 2 3 4 5 6 7 8
9
10
J4
VEE
C4 1uF
1206
100V
CT2
0.01uF
0805
200V
Q1
PSMN040-100MSE
2
4
7
3
1
6
8
5
JP2 HD1X3-079
PORT-
1
3
2
RM6
10.0k
R5 100k
D3 S1B
2
1
E2
VPORT-
JP3
HD1X3-079
MID
HI
LO
1
3 2
JP4
HD1X3-079
DUALPD
HI
LO
1
3 2
CT4
0.01uF
0805
200V
JP6
HD2X6-079
POWER MODE
1 3 5
6
4
2
7 9
8 10
11
12
R7 100
LED2 GREEN
PORT PWR
2
1
J3
AGND
F1 C1Q 3
1206
3A
R6 100
RM5
36.5k
R10 10 0805
D1
SMAJ58A
1
2
RT4
75
RX2
75
RX3
75
RT2
75
R2 0
E4
VEE
RG1 200
R1 0
R8 100
RM1
3.09k
+
C5 22uF 100V CE-KX
