DC1739B-C - Schematic

5
4
3
2
1
REVISION HISTORY
D11
10, 11
8, 7
6T
C25
6
1
9
17
10
B
PGNDP
R48
4.99K
C28
10nF
C29
33nF
R51
16.2K
R52
21.5K
PGNDP
C30
OPT
R53
8.25K
C31
OPT
464K
2.2nF
250V PGND
1812
C44
1.0nF
PGND
C26
R42 33nF 0ohms
78.7K COG
0805
R12
OPT
0402
R6
18
R35
1.82K
IS+
IS-
17
28
R45
R43
0
OPT
0402
0402
R44
102K VCC
VS+
VS-
VSOUT
ITH
LTC3766EGN
C
0
VCC
21
U2
R40
IS+
FB
11
+VOUT
C24
100
VS0
C18
2.2nF
7
R39
5
PT-
AS
R26
2.21K
PGND
0402
SGD
25
VAUX
19
R38
100
1T
4
PT+
C35
0.1uF
FS/SYNC
1.25T
3
26
1uF
0805
R33
0
0402
R24
100
0402
R23
100
0402
VCC
15
ISMAG
0.1uF
8
IN-
16
C21
R32
0
0402
NDRV
SGND
6
R31
0
0402
R30
0
0402
20.0K
T3
-VOUT
E4
RS+
R34
0
MODE
R29
C19
12nF
0805
1
R28
0
0402
FG
4
AS
C20
15
C9
68uF
16V
VPK
0402 Q7
OPT
PGND 50V
1.82K
1206
20
4
AG
IS-
7
8
IS+
2
PG
SSFLT
RCORE
R22
R21
0
22
1
11
PGNDP
U1
LTC3765EMSE
RUN
DELAY
13
PGND
C23
1uF
0805
R27
0.75
0805
1/3W
C22
220pF
GND2
2
4148
D5
ZHCS400
R25
10K
AG
IN+
GND
1
12
VCC
FS/UV
3
E5
0.1uF
1nF
NDRV
14
4
VCCP
RUN
4
C16
3
D2
AG1
R20
100
+
-VOUT
C15
OPT
1
R19
100
C8
68uF
16V
J4
RS-
1
2
3
R18
100K
0805
+
SGND PGND
D4
OPT
2
1
C17
Q6
2N7002
FDC2512-NL
6
5
2
1
R17
28.7K
0805
5
6
7
8
SGNDP
D3
ZHCS400
R11
51.1
0805
Q5
IRF6217
C12
10uF
16V
1210
1206
D
321
VIN
PGNDP
2
VIN
C11
OPT
16V
1210
0.005
2512
24
R14
0.004
2512
RS+
VAUX
E2
C14
0.1uF
1206
Q4
4 BSC190N15NS3/
FDMS86200
4
RS- R10
C10
2.2nF
630V
1206
IPK
123
FG
1
10
Q1
BSC028N06NS
4
0
0402
C
Q3
BSC057N08NS3
C13
1.0uF
321
100V
1210
8765
R37
909
0805
R4
15K
2512
ES1PD
2
J2
-VIN
8765
2
D1
PHASE
R9
-VIN
C7
15pF
0805
2
5678
R7
909
0805
+VOUT
12V / 10A
J3
5
Q2
OPT
3
4
3T
1
C39
1.0uF
50V
0805
+VOUT
SG
C5
10uF
50V
1210
PGND
C4
10uF
50V
1210
SW
27
C3
10uF
50V
1210
05-21-13
+VOUT
2
C2
10uF
50V
1210
DATE
DAVID B.
E3
FG
C1
100uF
50V
+
APPROVED
PRODUCTION
L4
16uH
GND
9 - 36 VIN
DESCRIPTION
RS-
14
FG
12.4
1206
C6
47pF
200V
1206
23
VIN
1
R1
VA
R2
6 OPT 0402
1 R3
PGND
5 OPT 0402
T1
SW
Q9
OPT
CHAMPS, G45R2-0603=3:6
SGND
REGSD
J1
2
16
L1
0.56uH
3
C43
OPT
3
OPT
R57
OPT
0805
VSEC
+VIN
1
SS
E1
3
R60
OPT
0805
9
4
REV
__
FGD/SWB
D
3
1
2
1
+VIN
2 T4
ECO
OPT
RUN
VIN
R46 R47
60.4K 15.0K C32
C33
47pF
12
R56
100
R8
0
0402
13
6
VCC
VS0
R41
14.7K
C37
1.0nF
R36
11.5K
PGND
C27
10uF
16V
1206
B
R49 R50 C36
1.87K 604 1.5nF
0402
2.2nF
Fsw=240KHz
SGND
SGNDP
VA
SW
VCCP
Q8
OPT
1
A
NOTE:
10uF 50V Murata GRM32ER71H106KA12 (X7R 1210)
10uF 16V Murata GRM31CR71C106MA12 (X7R 1206)
10uF 16V GRM31CR1C106K (1206 X5R)
2.2nF 250V Murata GA343QR7GD222KW01L (X7R 1812)
68uF 16V Sanyo 16TQC68M
100uF 50V Suncon 50ME100PX (10x12mm)
L1 Vishay IHLP2525EZER0R56M01
L4 Champs PQA2050-16-HX
0.004 ohm Susumu KRL6432D-C-R004-F-T5 (2512)
0.005 ohm Panasonic ERJM1WSF5M0U (2512)
R27 SUSUMU, RL1220S-R75-F (0805)
T1 Champs, G45R2-0603-XX (3:6)
T3 COILCRAFT, CT8281-BL (1.25T:1T)
5
6
4
3
C42
OPT
0402
5
VAUX
OPT
OPT
0402
AG1
2
D10
1
2
C40
OPT
0805
1
VA
D9
2
OPT
VAUX
L5
OPT
VPK
VA
OPT
1
2
C34
OPT
1206
OPT
D7
1 R55
OPT
OPT
0805
PGND
R59
CUSTOMER NOTICE
0
0402
TECHNOLOGY
LT
DAVID B.
TITLE: SCHEMATIC
SIZE
THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
3
N/A
SCALE = NONE
2
DATE:
+VOUT
R54
0
0402
C38
OPT
0805
PGND
APPROVALS
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A
CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;
HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO
PCB DES.
VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL
APP ENG.
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.
4
+VOUT
R58
2
AG
C41
D8
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 1739B-C
Tuesday, May 21, 2013
SHEET 1
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REV.
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OF 1
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