DC1300A-C - Schematic

A
B
C
D
E
L3
(Opt.)
VSW
0
Q2
1
R23
R24
(Opt.)
1/4W
C66
3.3nF
100V
Q39
(Opt.)
C1
390pF
200V
1206
C20
(Opt.)
200V
-VOUTP1
R83
(Opt.)
C70
3.9nF
VCC
C78
4.7nF
C30
2.2nF
250V
-VOUTS -VOUTP
-VOUTP
R66
100K
3
+VOUT
MODE
IS+
SLP
RUN/SS
SS
16
11
10
IS-
12
PGND
R63
90.9K
VIN
3
Q27
FCX491A
SG
7
U2
LTC3726EGN
C7
100pF
SW
FG
PT-
13
14
GND
5
R61
100
11
R86
261K
PT+
PT-
6
8
R87
0
C88
2
10
7
IS
GATE
15
6
4
5
FS/IN-
6
9
3
C73
470pF
-VOUTP
C71
1uF
8
SSFLT
C6
100pF
4
GND
2
C29
33nF
PGND
ULVO
VSLMT
1
C24
4.7uF
C55
1nF
1
T2
PA0297
C72
0.1uF
FB/IN+
VCC
5.1K
1
2
2
3
8
D4
4.7V
MMSZ5230BS
R22
28.7K
NDRV
VCp
R18
147K
R58
U1
LTC3725EMSE
-Vout
1
R56
100
FS/SYNC
3
Rb
162K
E4
VSB
FB/PH
9
10K
R84
0
47uF
20V
3
C27 2.2nF
2
Ra
10K
R76
680
1206
R85
(Opt.)
2
R6
1
R55
100
1%
1
R98
22
CUT
Q28
FMMT38C
R54
100
1%
1
Q6
MMBFJ201
3
3
D28
MMSZ5236BS
7.5V
VCC
Q26
FMMT619
Q27C
2
3
Q32
FMMT718
3
2
3
FMMT718
C80
+ C83
C69
330pF
200V
1206
R50
0.006
1W
VA
C31
C33
22uF
16V
1210
2
2
2
3
Q8 Q11
Si7370DP
R95
Q3
Q12
Q38
Si7450DP
Q14
Q15
Si7456DP
2
E3
16uH
PULSE,
PA2050.163NL
R1
R2
R51
R52
196
1
1
(Opt.)
VIN
3
4
7
C89
0.22uF
R49
R3
100
1.0
R79
3.3K
8
Q1
FMMT619
1
3
R11
R12
9
VCp
4
+Vout
15V/6.4A
2
2.2K
D7
BAS21
+VOUT
L2
1
5
10
R13
0
1206
1
R97
1
VCC
E2
2
3
11
T3
PA1005.100
3
3
1
C3
C4
C5
6.8uF
50V
1812
C2
6.8uF
50V
1812
1
SG
E1
R4
22
25V
6
7 4 6 5 8
VA
R41
14.7K
C10
(Opt.)
4
R9
(Opt.)
ITH
-Vin
VIN
C67
4.7uF
D1
(Opt.)
5
4
+Vin
9V - 36V
D25
(Opt.)
T1
PA0912
1
L1
0.47uH
R69
113K
C75
68pF
2
R46
619
R68
12.1K
C79
6.8nF
C76
(Opt.)
-VOUTS
C77
22uF
1210
-VOUTP
-VOUTS
47pF
D29
PT1N4148WS
Q27C
SS
R90
7.50K
R93
147
1%
-VOUTS
SG
C82
82pF
R94 147
1
2
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
LINEAR TECHNOLOGY CORPORATION
Customer Notice
R92
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
Supplied For Use With Linear Technology Parts.
47K
1
1%
Q37
MMBT2907A
A
5
C8
470pF
D6
4.3V
MMSZ4687T1
C9
0.22uF
Q36
MBT3946DW1T1
-VOUTS
2
2
Q34
2N7002
2
2
VCC
R91
10.0K
3
R89
732
1
1
R7
47K
VSB
-VOUTS
3
D3
22V
MMSZ5251BS
4
1
3
2
6
C81
10pF
2
1
1
VSW
1
D2
1N4148WS
B
C
D
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
LTC3725EMSE, LTC3726EGN 9V-36Vin Forward Converter
Size
Document Number
Rev
Demo Circuit 1300A-C
Date:
Friday, June 05, 2009
Sheet
E
3
of
3
1
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