DC1317A-A - Schematic

4
+VIN
+VB
R1
2.2
TP1
+VIN
D
4
D3
BAS516
6
3
2
R5
opt.
1
C3
opt.
6
2
GND
TG
5
3
INP
TS
4
C21
0805
R9
0
D1
opt.
2
3
Q12
BC856T
1
R13
22K
R14
33K
R15
115K
R42
0
C10
0.1uF
R22
13.3K
1
COMP
2
FB=1.23V
16
VIN
15
3
ROSC
OUT
14
4
SYNC
PGND
13
5
SS/MAXDC DELAY
12
6
VR=2.5V
OC
11
ISENSE
10
BLANK
9
7
SD/VSEC
8
GND
C7
opt.
SOUT
C8
opt.
VU1
D10
BAT760
CU1
4.7uF
16V
1206
C9
R20
100pF 174K
R23
1.2K
R24
39K
C11
OPT
SW1
C5
opt.
0805
R21
opt.
VAUX
C14
opt.
0805
U6
PS2801-1
4
1
3
2
D11
BAS516
R31
0
C15
2200pF
250V
1812
C34
R54
4.7
C25
10nF 200V
1206
VAUX
R27
470
VU1
1
CS+ SYNC
8
2
CS- TIMER
7
3
CG
GND
6
4
VCC
FG
5
A
U7
1
VCC BOOST
6
2
GND
TG
5
INP
TS
LTC4440ES6
opt.
4
3
SOUT
R48
opt.
C30
opt.
C29
opt.
4
R52
opt.
FG
U4
LT4430ES6
10V
1
C16
0.22uF
2
3
VCC OPTO
6
GND COMP
5
OC
4
FB
C17
0.01uF
R35 +VO1
82.5K
1% 0805
R34
4.75K
1%
C18
OPT
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
1. ALL RESISTORS ARE 0603.
ALL CAPACITORS ARE 0603.
-E
36V - 72V
*
-F
9V - 36V
3.3V @ 20A (5V @ 15A)
-G
9V - 36V
12V @ 5A (18V @ 4A)
SEE QUICK START GUIDE.
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
C
C12
opt.
R51
opt.
-H
C28
opt.
R19
opt.
opt.
NOTES: UNLESS OTHERWISE SPECIFIED
D14
BAS516
PA2720NL
SYNC
CG
C19
1uF
10V
0805
0.22uF
200V
1210
R45
10K
OPTIONAL CIRCUIT
VAUX
U5
LTC3900CS8
R18
opt.
D9
opt.
R17
opt.
1
2
3
5
SYNC
4
SW2
8
9
10
SW1 R16
opt. 0805
Q13
Si2325
6
7
4
1
D17
BAS516
SW0
C33
0.1uF
C6
opt.
0805
4
R2
opt.
SW0 +VIN
A1
5
R30
1.2K
OPTIONAL FOOTPRINT FOR T1
R10
opt.
16V
C13
0.47uF 10V
R53
200
2
6
2
R26
220
C23
1uF
VFB
332K
D8
opt.
5
6
7
8
R32
B
TP6
CO3: SEE QUICK START GUIDE
(INSTALL 330 OHMS RESISTOR IN PLACE OF CO3)
1
Q9
0 ohm
VU1
R33
470K
VR2
1
3
R28
442K
VAUX
4
2
0805
T2
opt.
PULSE ENG.
TP5
-VOUT
opt.
D6
B0540W
L3
OPT
L4
opt.
OUT
SOUT
6.3V
APXE
0805
R6
0
U1
LT1952EGN-1
R29
22K
+VB
R3
opt.
D
CSYS
+ 470uF
+VO1
D7
opt.
RCS1
0.015
1206
opt.
VFB
**
CO1
CO2
100uF
6.3V
TDK
1812
CO3 opt.
1206
R12
C4
0 ohm
R8
2.2
+VOUT
D15
opt.
D16
opt.
Q1
Si7430DP
TP4
Q3
HAT2165
Q2
HAT2165
2.2
+VO1
opt.
C31
0805
R7
opt.
CG
2.2
0805
opt.
R50
4
5
VCCBOOST
R49
FG
C32
SW0
U2
opt.
C
9
10
11
+VIN
-VIN
TP3
L1
0.65uH
PA1671.650
2
5
1
4
3
SW1
SW2
TP2
VU1
100V
7
8
1
1
C35
T1
PA0861.004
A1
D2
BAS516
D5
PDZ10B
C1
opt. 1206 opt.
VR2
R11
82K
2
R4 R55
L2
1.5mH
DO1607B-155ML-C
VU1
3
**
CIN1
CIN2
CIN3
2.2uF
100V
TDK
1812
6
5
2
1
3
Q10
PBSS8110D
3
5
3
9V - 36V
CONTRACT NO.
APPROVALS
DRAWN
J. Wu
DATE
10/8/07
TECHNOLOGY
TITLE
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
CHECKED
SIZE
CAGE CODE
APPROVED
Wednesday, December 10, 2008SCALE:
2
*
*
LT1952EGN-1, LT4430ES6
ENGINEER
G. Perica
5V @ 12A
FILENAME:
DWG NO
REV
DC1317A-A
SHEET
1
1
A
OF
1
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