DC1335B - Schematic

5
4
3
J1
SS-6488-NF-K1
IN FROM
HIGH
POWER
PSE
1
TX+
2
TX-
3
RX+
6
4
SPARE1
7
6
TD+
1
10
5
TCT
2
TD-
TXCT
11
3
OUT
4
RD+
4
RXCT
TO
12
3
RCT
5
PHY
13
2
RD-
6
SPARE2
8
R5
75
R4
75
R1
51K
1%
VPORTP
C15
0.01uF
100V
C14
0.01uF
100V
C16
0.01uF
100V
C13
0.01uF
100V
14
R6
75
1
1
1
C6
2.2uF
100V
1210
10uF
100V
D11
BAS21
R9
*
1206
D5
E5
RXCT
VPORT_N
C19
1uF
16V
0805
C18
*
3528
C9
*
1206
*
3528
R33
*
D15
LED
GREEN
E3
R34
*
1206
-VOUT *
Q2
*
C
C4
*
0805
Q1
FDS2582
18
R21
24K
UVLO
2
19
R23
12K
R24
100K
R25
*
R26
38.3K
E11
C27
1uF
16V
0805
C26
*
R27
*
C30
33pF
C31
Opt.
+VOUT
IOUT
Q7
MMBT3904
3
2
C33
*
C32
0.1uF
2
R15
*
R35
*
3
C24
1uF
16V
0805
R22
15
1%
C28
2.2nF
B
6
T2
PE-68386
D14
BAT54
R28
10K
1
4
2
C11
2.2nF
2KV
E13
GND
D10
R9
R13
R15
R25
R27
R33
R34
R35
L1
B0540W
20K
28.7K
47
1K
5.1K
270
5.1
Opt.
180nH
1nF
Opt.
39K
27.4K
Opt.
1.21K
10K
620
5.1
0
180nH
1nF
Opt.
20K
29.4K
Opt.
2.2K
10K
2K
15
0
330nH
C1
C3
C4
C7
C9
C10
C18
C26
C33
3.3V
7A
22uF
22uF
2.2nF
22pF
Opt.
100uF
22uF
6.8nF
2.2nF
DC1335B-B
5V
5A
22uF
22uF
1.5nF
22pF
Opt.
100uF
10uF
3.3nF
DC1335B-C
12V
2A
4.7uF
4.7uF
470pF
47pF
Opt.
47uF
22uF
4.7nF
T1
Q2
EPC3408G-LF or
PA2466NL
PA2369NL or
EPC3409G-LF
PA2467NL or
EPC3410G-LF
CUSTOMER NOTICE
FDS8670
FDS8880
FDS3572
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
APPLICATION. COMPONENT SUBSTITUTION AND PRINTED
CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT
PERFORMANCE OR RELIABILITY. CONTACT LINEAR
TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.
A
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
5
Q6
MMBT3906
R17
100
33
GND
CCMP
21
SFST
OSC
14
15
ENDLY
SYNC
RCMP
12
22
13
TON
PGDLY
11
17
1
R36
30.9
1%
D16
BAS21
23
3
NC
VNEG
VNEG
R20
3.01K
1%
1
SG
VCC
PG
9
24
10
8
NC
25
31
NC
T2P
NC
2
30
29
SENSESHDN
3
C25
Opt.
E12
VPORTN
NC
VCMP
R19
14.0K
1%
AUX-
R16
0.033
1/2W
exposed pad, solder side
28
27
26
E10
20
1
1
SENSE+
1
3
4
D10
*
FB
D12
S1B
DC1335B-A
+C10
C3
*
1206
3
Q5
BSS63LT1
E9
R18
10.0K
1%
16
VPORTP
NC
VPORTN
VPORTN
1
SPARE2
R12
383K
1%
1
*
+VOUT *
E1
C1
*
1206
C7
*
1206
3
ASSY
+VOUT
6
7
R11
0
/PWRGD
2
D9
32
2
R14
107K
1%
RCLASS
SPARE1
E8
1
AUX-
L1
*
10
9
E6
PWRGD
U1
LTC4269IDKD-1
D13
36V
PDZ36B
7
6
5
D8
PD IN =
37V - 57V
B
T2P
R13
*
Auxiliary Supply
48V, 30W
AUX+
03-10-10
3
+
PWRGD PWRGD
E7
D6
SPARE2
T1
*
TXCT
D7
SPARE1
E14
E4
1
RXCT
D2
R2
150
1206
3
1
2
+C5
D1
SMAJ58A
R10
20
TXCT
DATE
RYAN H.
R8
20K
5
B1100 x 8 places
APPROVED
R7
75
VPORTP
E2
DESCRIPTION
PRODUCTION REBUILD W CHANGES
3
2
C8
0.1uF
100V
C
2
4
2
VPORTP
D4
REV
1
D
1
L2
10uH
DO1608C-103
D3
ECO
U2
PS2801-1-L
C17
1000pF
2KV
VPORT_P
1
REVISION HISTORY
J2
Opt.
9
5
D
2
T3
ETH1-230LD
4
3
TECHNOLOGY
KT
RYAN H.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
TITLE: SCHEMATIC
HIGH POWER, HIGH EFFICIENCY POE PD INTERFACE
WITH INTEGRATED SWITCHING REGULATOR
SIZE
IC NO.
REV.
LTC4269IDKD-1
2
DEMO CIRCUIT 1335B
SCALE = NONE
2
DATE:
Wednesday, March 10, 2010
SHEET
1
1
OF 1
A
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