DC1031A-A - Schematic

4
3
C69
5
R88
0
6
4
8
C71
1uF
C70
15 PT+
5
14 PT-
* R63
U2
R66
100K
VIN
R86
C78
33nF
C30
opt.
2.2nF
250V
-VOUT
2
16
FB/PH
C
C23
opt.
4
R68
6.2K
* R69
C76
opt.
C79
2.2nF
C75
47pF
-VOUT
C77
2.2uF
VSW C81
Vout/Iout
D1
R41
R48
R63
R69
R85
R89
T1
C69
2.5V/20A
opt.
CMPSH1-4
1.91K
0.039
160K
0
910
PA0865(4:4:1:1)
2.2nF
Q34
DC1031A-B
3.3V/20A
opt.
2.74K
0.039
160K
0
910
PA0815(6:6:2:1)
2.2nF
2N7002
DC1031A-C
5.0V/20A
CMPSH1-4
CMPSH1-4
opt.
opt
opt
4.42K
0.022
100K
124K
3.01K
536
PA0811(4:4:2:1)
1.5nF
10pF
3
VERSION
1
R46
604
B
PT-
D29
1N4148W
R89
2
*
-VOUT
For All The Versions
C2-C5 1uF,100V TDK C3225X7R2A105M (1210)
C31,C33 100uF, 6.3V CER TDK C3225X5R0J107M (1210)
C68 Sanyo 6TPE220MI
L1 Vishay IHLP-2525CZER1R0M-01 or
COOPER HCP0703-1R0-R
L2 Coil Tronics HC1-R87
T2 Pulse PA0297 2(1.4mH):1:1
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
CIRUIT 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.
5
-Vout
R75
opt.
* R41
DC1031A-A
D25
-
VCC
-VOUT
330pF
LTC3726EGN
Q27
FCX491
1
R83
0
D28
R56
opt. MMBZ5236B
7.5V
*
220uF
6.3V
opt.
E4
3
R85
PT-
R61
100
* VERSION TABLE
A
3
T2
1
R55
100
1%
220uF
6.3V
+ C80
E8
SG 1
IS 10
GND
PGND
R87
0
B
C73 0.1uF
470pF
11
C29
33nF
6
1uF
FS/IN-
5.1K
C72
4
LTC3725EMSE
9
470pF
GATE 7
NDRV 3
ULVO
2 SSFLT
C24
FB/IN+
U1
VSLMT
1
C55
R84
0
R53
opt.
R58
8 VCC
R22
15.0K
R54
Q25 100
opt. 1%
FS/SYNC
3
R77
0
Q33
opt.
C31
100uF
6.3V
-VOUT
Q26 VCC
opt.
R76
1K
1206
9
R18
365K
VCC
R29
100K
Q28
FDC2512
4
C
VA
Q32
opt.
SLP
6
5
2
1
330pF
0.002
1W
IS- 10
1W
C27
R52
opt.
1/4W
R51
1/4W
2.4
* R48
321
R50
321
RUN/SS
100
VA
4
VA
IS+ 11
123
R3
4
+ C68
5
*
50V
C33
100uF
6.3V
R2
1.2
1/4W
C67
4.7uF
25V
* D1
8765
VSW
D
VCC
C66
1nF
200V
4
0
E2
8765
6
R49
-Vin
7
ITH
2
5678
12
C5
1.0uF
100V
SW
C4
1.0uF
100V
+Vout
E3
* D25
Q12
Si7336ADP
R79
510
Q14
Si7336ADP
PGND
C3
1.0uF
100V
C2
1.0uF
100V
8
FG 2
36-72Vin
3
4
Q11
Q8
Si7450DP opt.
E7
0.87uH
10
9
13
D
+
+VOUT
L2
11
7
1.0uH
1
MODE 3
5
GND
E1
* T1
VIN
L1
+Vin
2
8
5
4
3
CONTRACT NO.
APPROVALS
DRAWN
DATE
J. WU
12/5/05
CHECKED
A
TITLE
LTC3725EMSE, LTC3726EGN, 36V - 72Vin Forward Converter
APPROVED
ENGINEER
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
K. Mathews
12/5/05
DESIGNER
Monday, August 28, 2006
2
SIZE
CAGE CODE
SCALE:
FILENAME:
DWG NO
REV
DC1031A
SHEET
1
A
1
OF
1
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