DC950A - Schematic

5
*
4
3
E2
VIN-
*
5
+
E3
L1
0.2uH
FP2-S200
11
12
C8
*
1
Q1
Si74850DY
T1
L2
4.7UH
HCP0703-4R7-R
VIN+
2
C1
330pF
100V
6
C3
47uF
1210
R2
18
1206
5V/2A
E1
+C7
C4
47uF
1210
100uF
6.3V
1
D
C9
3
1
Q4
*
*
L3
0.2uH
FP2-S200
1206
R4
*1206
1
3.3V/3A
10
R5
22
1206
C13
47uF
1210
3
E4
+C17
C14
47uF
1210
100uF
6.3V
3
D2
BAS21
D
Q3
Si4840DY
2
4
3
2
R8
R6
*0805 1206
*
D4
Q5
*
*
1
C18
C19
0.1uF
*
L4
0.2uH
FP2-S200
9
8
C26
47uF
1210
1210
7
2.5V/3A
E5
+C23
C27
47uF
1210
100uF
6.3V
E6
Q6
*
R20
R22
3.01K
1%
*
R24
*
R25
100K
*1%
R27
150K
C38
33pF
C39
Opt.
3
C32
0.1uF
GND
1
C35
3300pF
R28
10K
C40
1000pF
3
C37
680pF
5
T2
PA0173
Q9
FMMT619
R21
15
C34
2200pF
L6
120uH
744 032 121
C36
0.47uF
25V
1
Q10
FMMT718
R23
10K
D8
BAT54
C41
330pF
1
2
1
2
D10
BAT54S
D9
B0530W
1
B
3
3
2
1
4
2
1
3
6
1
R14
1K
2
Q8
FMMT718
R19
10K
D6
BAT54
2
9
17
CCMP
13
SFST
6
OSC
7
4
R26
*
3
16
1
ENDLY
RCMP
14
SYNC
5
TON
C33
470pF
Opt.
VC
R18
1206
*
2
PGDLY
11
R17
1206
D5
BAT54A
C31
0.1uF
25V
1
3
15
SENSE-
R15
330
12
Q7
FMMT619
R16
15
C30
2200pF
L5
330uH
DO1608C-334
3
UVLO
3
B
SENSE+
expose pad is GND
10
*
U1
See Table
PG
FB
C21
1812
*
1
*
0805
C20
1812
3
R13
SG
8
VCC
2
R9
1K
C
2
R11
0
2
C
R12
28.7k
1%
0805
GND
Q12
FMMT718
1
3
C43
4700pF
250V
TABLE:
R30
4.64K
R29
1K
*
ASSEMBLY
VIN+
U1
C8
C9
C18
C20, C21
DC950A-A
36V-72V
LT3825EFE
12uF
150pF
22uF
2.2uF
DC950A-B
9V-36V
LT3837EFE
47uF
560pF
OPT.
4.7uF
D4
Q4
R4
R6
R8
R13
R17
R18
R20
R24
R26
OPT.
OPT.
Si4840DY
Si4488DY
OPT.
47K
91
402K
0.025
opt.
14.7K
12.4K
1.00K
PA2046NL
MMBT3904LT
HAT2165H
Si7852DP
4.7K
OPT.
22.1
121K
0.015
0.015
22.1K
13.0K
750
PA2047NL
BZX84C11-V
Q5
Q6
LTC CONFIDENTIAL - FOR CUSTOMER USE ONLY
A
Customer Notice
5
4
3
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.
2
T1
LINEAR TECHNOLOGY CORPORATION
1630 McCARTHY BLVD.
MILPITAS, CA. 95035
408-432-1900
408-434-0507 FAX
Title
Size
Date:
Multi-Output Flyback in 1/8 Brick Format
Document Number
Demo Circuit 950A-A/B
Thursday, October 11, 2007
Rev
A
LT3825EFE/LT3837EFE
Sheet
1
1
of
1
A
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