DC1143A - Schematic

1
2
5
D2
BAS21LT1
Q1
Si7302DN 5 6 7 8
R3
26.1K
R1
R7
20
0805
0
R20
12.1k
R16
100K
R18 R19
1.21K 38.3K
C17
33pF
SFST
13 CCMP
SENN 11
6
OSCAP
A
D7
4
B0540WS
321
C
17 SGND/PGND
7
SYNC
ENDLY
4
3
TON
R15
3.01k
14 ROCMP
R14
14.0k
15 PGDLY
-VOUT
Q12
E
E
Q13
C
R27
47
0805
R28
OPT
0805
SENP 12
LT3825EFE
5
C12
OPT
8765
Q3
Si4324DY
123
U1
10 UVLO
R2
3.3
1206
SG 1
PG 16
8 FB
C3
1.0nF
0805
4
SG
VCC 2
R5
383K
E4
C7
4.7nF
250V
1206
C11
0.1uF
+
3
4
100
4
2
C10
47uF
20V
6032
R6
10
11
12
+VOUT
E3
[email protected]
+ C29
150uF
6.3V
SANYO 6TPB150MC
1
E2
C4
47pF
250V
0805
2
C18
OPT
R9
0.04
0.25W
1206
R4
330
FMMT718
FMMT618
R26
15
C8
0.1uF
VC 9
C23
10nF
C13
0.1uF
B
-VIN
R8
47K
0.25W
1206
C25
2.2uF
100V
1812
C2
47uF
6.3V
1210
R22
10.0K
T2
8
5
C19
2.2nF
C20
2.2nF
1
C21
1uF
1206
1
A
C30 +
10uF
100V
4.7uH
C1
47uF
6.3V
1210
0.48uH
3
D5
4
BAT54WS
PA0184
R13
10K
2
36V- 72V
L1
E1
L2
1
B
+VIN
6
2
1
T1 PA2069NL
7
8
9
B
B
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.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
1
CONTRACT NO.
APPROVALS
DRAWN
Helen
DATE
8/08/06
CHECKED
TECHNOLOGY
TITLE
LT3825EFE
SYNCHRONOUS FLYBACK CONVERTER
SIZE
CAGE CODE
APPROVED
ENGINEER David Burgoon 8/08/06
DESIGNER
Thursday, May 31, 2007
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
SCALE:
FILENAME:
2
DWG NO
REV
A
DC1143A
SHEET
1
OF
1
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