DC1317A-E - Schematic

4
+VB
R1
2.2
+VIN
**
CIN1
CIN2 opt.
CIN3
2.2uF
100V
TDK
1812
D
6
5
2
1
VU1
4
A1
D2
BAS516
1
D5
PDZ10B
D3
BAS516
-VIN
2
3
VCC BOOST
6
GND
5
TG
INP
R50
C21
R9
0
3.3
Q12
BC856T
1
R13
22K
R14
33K
R15
143K
R42
0
C10
0.1uF
R22
13.3K
R29
22K
1
COMP
2
FB=1.23V
SOUT
16
VIN
15
ROSC
OUT
14
4
SYNC
PGND
13
5
SS/MAXDC DELAY
12
6
VR=2.5V
OC
11
ISENSE
10
BLANK
9
SD/VSEC
8
GND
D10
opt.
C8
opt.
CU1
4.7uF
16V
C9
R20
100pF 340K
R23
1K
R24
10K
R28
442K
VR2
R32
C11
opt.
C33
0.1uF
T1 FOOTPRINT
SW1
SW2
OPTIONAL CIRCUIT
VU1
8
9
10
5
3
4
PA2720NL
C28
opt.
A
U7
1
VCC BOOST
6
2
GND
TG
5
INP
TS
4
3
opt.
SOUT
R48
opt.
C30
opt.
C29
opt.
4
TP6
VAUX
4
2
1
Q9
0 ohm
D8
opt.
R10
opt.
C5
opt.
50V
0805
C6
opt.
50V
0805
SYNC
SW1 R16
opt.
D9
opt.
VAUX
U6
PS2801-1
R21
opt.
4
1
3
2
D11
BAS516
C14
opt.
R27
270
D17
BAS516
VAUX
R31
0
C15
2200pF
250V
1812
R54
C34
opt
opt
3
1206
1
CS+ SYNC
8
2
CS- TIMER
7
3
CG
GND
6
4
VCC
FG
5
6
GND COMP
5
OC
4
FB
C17
0.01uF
C18
opt.
R19
opt.
C12
opt.
R52
opt.
CG
VCC OPTO
C19
0.33uF
10V
0805
33nF
C25
200V
SYNC
R51
opt.
U4
LT4430ES6
10V
1
C16
0.22uF
2
C
U5
opt.
R18
opt.
R17
opt.
FG
R35 +VO1
137K
1% 0805
R34
5.36K
1%
C24
47pF
B
**
R38
18.2K
1%
FOR ASSEMBLY
VERSIONS
+VIN
+VOUT
-A
34V - 75V
3.3V @ 30A
-B
18V - 72V
5V @ 25A
-C
18V - 72V
12V @ 8A
-D
18V - 72V
24V @ 4A
R45
10K
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
-E
36V - 72V
9V - 36V
3.3V @ 20A (5V @ 15A)
D14
BAS516
*
-F
-G
9V - 36V
12V @ 5A (18V @ 4A)
NOTES: UNLESS OTHERWISE SPECIFIED
SEE QUICK START GUIDE.
-H
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.
5
opt.
D6
1N4148W
C4
0 ohm
VAUX
1
2
3
6
7
4
1
5
Q13
Si2325DS
4
SW0 +VIN
A1
2
R30
1.2K
R53
200
TP5
-VOUT
16V
C13
0.47uF 10V
SW0
2
1
T2
opt.
PULSE ENG.
6
R26
220
C23
1uF
VFB
332K
D
+VO1
VU1
R2
opt.
**
CSYS
470uF
6.3V
R12
L3
opt.
L4
opt.
SOUT
VU1
D15
opt.
+
0805
C7
opt.
OUT
3
7
R6
0
R33
158K
+VB
B
U1
LT1952EGN-1
R3
opt.
Q3
FDMC8854
Q2
FDMC8854
D7
opt.
RCS1
0.025
1206
opt.
CO1
CO2 opt.
100uF
6.3V
TDK
1812
CO3 opt.
1206
5
6
7
8
3
2
C
D1
opt.
C31
opt.
R8
100
R7
opt.
VFB
3.1uH
CG
0
D16
opt.
Q1
Si7818DN
4
TS
R49
opt.
C32
4
5
1
TP4
FG
SW0
C3
opt.
+VO1
L1
+VOUT
3
2
R5
opt.
TP3
SW1
9
10
11
+VIN
U2 opt.
100V
T1
opt.
7
8
6
1
C35
SW2
TP2
VU1
C1
opt. 1206 opt.
VR2
R11
82K
2
R4 R55
L2
1.5mH
DO1607B-155ML-C
3
+VIN
TP1
3
Q10
PBSS8110D
3
5
3
9V - 36V
CONTRACT NO.
APPROVALS
DRAWN
J. Wu
DATE
10/8/07
TECHNOLOGY
TITLE
CHECKED
SIZE
CAGE CODE
APPROVED
2
48V @ 1.5A
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
A
ISOLATED FORWARD DC/DC CONVERTER
10/8/07
Wednesday, February 25, 2009
*
*
*
LT1952EGN-1, LT4430ES6
ENGINEER
G. Perica
5V @ 12A
SCALE:
FILENAME:
DWG NO
REV
DC1317A-E
SHEET
1
1
A
OF
1
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