DC894C - Schematic

1
2
3
4
5
REVISION HISTORY
ECO
REV
DESCRIPTION
DATE
APPROVED
1
PRODUCTION
11/01/13
KURK M.
T1
5
[1]
+VIN E1
6
2
1
L1
L2 [1]
7
8
9
A
E3
C1
C2
C5
C6
C29
[1]
[1]
[1]
OPT
[1]
+VOUT
A
[1]
4.7uH
+
C4
100pF
R8
47K
0.25W
C25
2.2uF
100V
-VIN
C10
47uF
20V
E2
R11 [1]
C11
+
0.1uF
5 6 7 8
R1 0
B
4
R7
[1]
D8
R16
169k
1%
Q4
Si7336ADP
OPT
4
SG
SENP
SENN
SGND/PGND
SFST
VC
17
6
OSCAP
D7
4
3 2 1
B
[1]
3 2 1
1
16
PG
ENDLY
ROCMP
R18
[1]
1%
7
3
R20
12k
4
1%
14
R15
3.01k
R14
15k
1%
Q3
[1]
8 7 6 5
C
PGDLY
TON
C12
OPT
VCC
2
15
8 7 6 5
Q12
R27
[1]
Q13
E
E
R28
[1]
C
SG
U1
LT3825EFE
UVLO
SYNC
10
FB
5
8
1 2 3
[1]
-VOUT
C7
4.7nF
250V
BAT760
SG
C
Q1
[1]
12
R9
FMMT718
[1]
11
9
8
C23
C17 C18
C13
47pF 10nF
OPT
0.1uF
R22
5
C20
2.2nF
1
[1]
1uF
C
T2
C19
[1]
C21
R26
15
C8
0.1uF
[1]
FMMT618
R4
330
0.5W
CCMP
R10
[1]
R2
[1]
13
R3
[1]
1%
E4
C3
D2
BAS21LT1
R5
412K
1%
3
4
R6 [1]
B
C30
22uF
100V
10
11
12
B
36V- 72V
R13
10K
D5
4
BAT54
PA0184
R19
100k
[1]
ASSY.
VOUT
IOUT
R2
R6
R7
R9
-A
3.3V
12A
4.7 28.7K 110
39
-B
5V
8A
4.7 29.4K 150
-C
12V
5A
15
R3
R10
R11
R18
R22
R28
R27
0.02
39
110
909
20K
OPT
47
20
0.018
OPT
150
1.47K
2K
OPT
47
68
0.012
OPT
160
1.82K
7.5K
D7
C5
C19
C23
C29
2.2nF
47uF
2.2nF
10nF
47uF
2.2nF
47uF
220pF
22uF
470pF
OPT
330pF
C1,C2
C3
B0540W
47uF
B0540W
OPT
Q3
T1
L2
470uF
PA1477NL
0.1uH
2.2nF
470uF
PA1735NL
0.1uH
BSC320N20NS
BSC011N03LSI
3.3nF
150uF
PA1736NL
1.0uH
BSC320N20NS
BSC028N06NS
Q1
D
D
30.9K 160
0
OPT
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.
E
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1
2
3
Si7336ADP
Si4490DY
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY
MI
KURK M.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
E
TITLE: SCHEMATIC
SYNCHRONOUS FLYBACK CONVERTER
SIZE
N/A
SCALE = NONE
4
IC NO.
LT3825EFE
REV.
DEMO CIRCUIT 894C
DATE: 12/03/13 11:01:43
SHEET 1
5
1
OF 1
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