DC1739A-B - Schematic

5
4
3
2
1
REVISION HISTORY
ECO
REV
__
1
DESCRIPTION
APPROVED
PRODUCTION
DATE
DAVID B.
04-14-12
PULSE, PA0801=4:4:4
E1
4T
100
C29
33nF
R51
13.3K
R52
22K
PGNDP
6
1
9
17
10
C28
10nF
R53
8.25K
C30
1nF
C31
1nF
+ C9
68uF
16V
C24
R40
PGNDP 2.2nF PGND
250V
1812
0
R42
OPT
C25
C26
33nF 0ohms
COG
0805
IS+ 18
IS- 17
VCC 28
NDRV 21
VAUX 24
VIN 22
R45
0
0402
R43
OPT
0402
PGND
R44
56.2K
VSOUT
ITH
VS+ 12
R56
1.00K
FB 6
VCC
C33
2.2nF
C32
47pF
C27
10uF
16V
1206
PGND
B
R50
R49
1.87K 604
SGND
Fsw=240KHz
C36
OPT
0402
OPT
0402
SGNDP SGNDP
NOTE:
2.2uF 100V Murata GRM32ER72A225MA35 (X7R 1210)
22uF 16V Murata GRM32ER61C226ME20 (X7R 1210)
10uF 16V GRM31CR1C106K (1206 X5R)
2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812)
68uF 16V Sanyo 16TQC68M
33uF 100V Suncon 100ME33PX (10x12mm)
L1 Vishay IHLP2525EZER1R5M01
L4 Pulse PA2729.802NL
0.004 ohm Panasonic ERJM1WTF4M0U (2512)
0.006 ohm Panasonic ERJM1WSF6M0U (2512)
R27 SUSUMU, RL1220S-R75-F (0805)
T1 PA0801NL
T3 PA3493NL
5
3
1
R13
OPT
0402
VA
Q8
OPT
1
D6
L5
3
2
2
0603
R12
A
SGNDP
R15 OPT
PG
C37
1.0nF
VS- 13
R41
4.12K
R46 R47
60.4K 15.0K
VCC
C
R35
R36
1.82K 11.5K
11
+VOUT
7
AS
SGD
25 PT-
LTC3766EGN
19
U2
4
-VOUT
IS+
C18
470pF
PGND
VAUX
FS/SYNC
1T
B
R48
4.99K
C8
68uF
16V
R26
OPT
0603
C35
0.1uF
MODE
1.25T
3
6
VCC
15
R39
ISMAG 5
T3
R33
0
0402
4
R38
100
1
+
RSRS+
R24
R23
100
100
0402
0402
VPK
0402 Q7
FMMT491A
PHASE
C20
0.1uF
19.1K
SGND
C21 26
PT+
1uF
0805
R21
0
R28
OPT
0402
5
C22
220pF
R30
0
0402
R29
SG 1
AG 4
IS- 7
IN- 16
DELAY
FS/UV
11 RCORE
GND
PGNDP
PGND
13 SSFLT
GND2
U1
LTC3765EMSE
IN+ 15
FG
R31 R32
0
0
0402 0402
PGND
12 RUN
C23
1uF
0805
IS+ 8
PG 2
NDRV 14
4
3 VCC
1nF
C17
0.1uF
R27
0.75 AS
0805
1/3W
27
C16
3
R25
10K
C12
22uF
16V
1210
E4
PGND
1.82K
1206
2
D5
ZHCS400
C11
22uF
16V
1210
C10
1nF
630V
1206
C15
OPT
50V
R22
D4
ES1PD
4
D
12V / 12.5A
J4
SGND PGND
FG 2
5
6
7
8
SGNDP
R20
100
R19
100
1
ES1PD
R5
68.1K
1206
321
GND
2
R18
100K
0805
Q6
FDC2512
6
5
2
1
R17
61.9K
0805
1
C
RS+
R11
75
0805
Q5
IRF6217
PGNDP
D3
ZHCS400
R4
68.1K
1206
0.004
2512
14
R14
0.006
2512
VIN
RS- R10
321
SW 23
E2
C13
1.0uF
100V
1210
C14
0.1uF
1206
123
4
D1
+VOUT
J3
1
Q4
4 FDMS86200
REGSD
4
0
0402
R37
909
0805
FG
E3
+VOUT
IPK
Q1
FDMS86201
2
8765
16
R9
J2
C7
OPT
0805
8765
Q3
FDMS86322
5678
PG
-VIN
7
L4
8.0uH
10
Q2
OPT
R7
909
0805
VSEC 3
C5
2.2uF
100V
1210
SS
C4
2.2uF
100V
1210
9
C3
2.2uF
100V
1210
2
FGD/SWB 20
C2
2.2uF
100V
1210
PGND
RUN
C1
33uF
100V
5
4T
3
4
4T
2
8
+
11
RS-
2
18 to 72 VIN
VIN
1
J1
6
51.1 1206
1
2
3
+VIN
C6
47pF
200V
1206
1
1
D
R1
VA
T1
L1
1.5uH
VAUX
VPK
OPT
C34
OPT
1206
OPT
SGNDP
+VOUT
R54
0
0402
PGND
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.
Unless otherwise specified:
All resistors are in ohms 0603.
All capacitors are in microfarads 0603.
All capacitors are 25V.
1/16W = 0402, 1/10W = 0603, 1/8W =
0805, 1/4W = 1206, 1W = 2512.
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
4
3
APPROVALS
PCB DES.
AK
APP ENG.
dkb
TECHNOLOGY
TITLE: SCHEMATIC
SIZE
N/A
SCALE = NONE
2
DATE:
IC NO.
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900 www.linear.com
Fax: (408)434-0507
LTC Confidential-For Customer Use Only
ACTIVE CLAMP FORWARD CONVERTER
WITH DIRECT FLUX LIMIT
LTC3765EMSE, LTC3766EGN
DEMO BOARD 1739A-B
Friday, June 15, 2012
SHEET 1
1
REV.
1
OF 1
A
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