DC888A - Schematic

5
4
3
2
R23
L5
T3
CT02-100
R49
C69
*100V
123
R3
1nF
1uF
R63
100K
2
CMPSH1-4
B
B
C84
R80
0.1uF 100K
3
6
D
R79
68K
1
BAS21
3
R78
10pF
T4
3
B
D1
4
[email protected]
DC888A-C
[email protected]
FB 6
VCC
R62
VCC 24
NDRV 18 1
VIN 19
MODE 4
OPT
7
R46
604
J1-7 +ITH
C77
2.2uF
7
P1-7
*
8
R71
J1-8
OPT
R72
P1-8
8
J1-9
9
OPT
*
36V
R74
R107
*
C30
-VIN
R82
-VOUT
2.2nF
250V
+VOUT
SG
150
C86
68pF
150
Q31
MMBT2907A
R56
R102
100
*
C31,C68
C33
220uF, 4V
220uF, 6.3V
68uF, 16V
opt
SYNC
P1-9
10
J1-10
OPT
Vaux
-ITH
9
R73
10
SSS
P1-10
B
11
R81
D2
CMPSH1-4
R108
6
* VERSION TABLE
DC888A-B
C
C79
J1-11
-VOUT
11
Q32
FMMT619
3
4
Vsg
P1-3
3
P1-4
4
J1-3
-VOUT
P1-11
J1-4
Q26
FMMT718
-VOUT
-VOUT
Vout/Iout
R60
OPT
*
*
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C74
OPT
D31
-VOUT
100uH
CMPSH1-4
D
DC888A-A
VS+ 10
OPT
R68
R69 R70
0
110K
R59
OPT
*
L1
DA2318-ALC
VERSION
*
VS- 11
VCC
C
1
R64
R67
*
+VPKS
P1-6
C75
T4 connection for A-A
A
J1-6
6
OPT
C85
0.1uF
-VPKS
J1-5
6
1
Q30
2N7002
*
VCC
-VOUT
D30
5
R41
C83
3
D24
1
D29
5
VCC
3
opt.
C78
10nF
2
4
Q29
Si2303BDS
1
A
C
3
Q27
VSOUT
C82
opt.
FS/IN- 5
E4
-
9
21 PT-
U2
LTC3706EGN
PHASE
1
22 PT+
* C70
5
1uF
SW
T4
TO CONFIGURE
FOR POLYPHASE
-Vout
FCX491A
SG 1
C71
D
*
SG
FS/SYNC
3
IS+
REGSD
R101
100
VCC
13
GND
opt.
4
6
2
IS+ 16
IS 10
C81
C100
C101 150pF
470pF
-VOUT
R53
12
R66
100K
T4 connection for A-B & A-C
*
P1-5
17
C29
10nF
FB/IN+ 4
PGND
C24
*
8
*
+ C68
E8
T2
5
0.1uF
11
C55
GATE 7
NDRV 3
2 SSFLT
R22
15.0K
6
2
P1-2
VSLMT
J1-2
9
SSP
*
+ C31
C67
10uF
25V
4
1/4W
-VOUT
5.1K
C72
LTC3725EMSE
*
ITH
*
U1
1 ULVO
2
+ C33
+Vout
D26
CMPSH1-4
12
6
5
2
1
4
P1-1
C
8 VCC
R18
365K
C34
321
Q25
R52
1/4W
R58
3
1
Vaux
7
*
R29
100K
1
E3
FMMT718
R51
J1-1
E7
-VOUT
C27
-VIN
*
+
+VOUT
1
2
Vsg
4
R48
1.5W
100pF
Q28
FDC2512
8765
SW
321
100
TO CONFIGURE
FOR POLYPHASE
Q12
Q13
Q23
R75
510
8765
C66
*200V
4
0
11
*
SLP
-VIN
5
6
5678
Q14
Q15
Q24
14
E2
* R76
B
10
8
*
4
5
IS- 15
-Vin
4
3
L6
1/4W -VOUT
RUN/SS
IS+
*
Q8
Q9 Q11
Si7450DP
-VOUT
*
PGOOD
*
R84
7
3
C5
2.2uF
100V
C51
*100V
A
*
8
C4
2.2uF
100V
T1
1
2
FG 2
D
C3
2.2uF
100V
3
SW 20
C2
2.2uF
100V
D27
BAS21
4
1/4W
*R24
GND
36V-72Vin
2
PGND
1
0.68uH
E1
23
+Vin
1
C34
C66
C51,C69
C70
C75
C79
D30
D31
L6
Q8
22uF
1.5nF
4.7nF
3.3nF
47pF
4.7nF
opt.
opt.
PA1382.650
opt.
22uF
1.5nF
2.2nF
3.3nF
100pF
3.3nF
opt.
opt.
10uF
680pF
1.0nF
10nF
470pF
4.7nF
BAS21
MMBZ5258B
PA1382.650
PA1494.242
Si7450DP
Si7450DP
Q12-Q15
R41
R48
R68
R76
R78
R84
R102
R107
R108
T1
2.74K
0.015
9.1K
9.53
2.2K
opt.
opt.
0
PA0950(6:6:1:1)
6.8
4.42K
0.015
9.1K
8.06
620
750
1.0K
0.010
6.2K
7.50
390
330
opt.
0
PA0954(4:4:1:1)
11.5K
opt.
240
0
10
opt.
PA0955(6:6:2:1)
Q23,Q24 R23,R24,R51,R52
Si7336ADP
5.1
Si7336ADP
HAT2244WP
opt.
A
A
NOTE:
C2-C5 2.2uF,100V Murata GRM32ER72A225K
L5 VISHAY IHLP2525CZERR68M01
T2 Pulse PA1954NL
CUSTOMER NOTICE
CONTRACT NO.
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
4
3
2
APPROVALS
DRAWN
J. WU
DATE
10/16/06
CHECKED
TECHNOLOGY
TITLE
LTC3725EMSE, LTC3706EGN, 36V - 72Vin Forward Converter
APPROVED
ENGINEER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
R. Huff
10/16/06
DESIGNER
Thursday, August 30, 2007
SIZE
CAGE CODE
SCALE:
DWG NO
REV
A
DC888A
FILENAME:
SHEET
1
1
OF
1
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