8
dc1739afb
DEMO MANUAL DC1739A-B
SIMPLE SCHEMATIC DIAGRAM
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
12V / 12.5A
Fsw=240KHz
4T
1T
1.
25
T
+VOUT
4T
-VOUT
4T
-VIN
+VIN
Unless otherwise specified:
All resistors are in ohms 0603.
All capacitors are in microfarads 0603.
All capacitors are 25V.
1/16W = 0603, 1/8W = 0805, 1/4W = 1206.
18 to 72 VIN
NOTE:
2.2u
F 100V
Mu
rata
G
RM32E
R72A225MA35
(X7R
1210)
22
uF
1
6V
M
ur
at
a G
RM32ER61C226ME20
(X7R
1210)
2.2n
F 250V
Mu
rata G
A343Q
R7G
D222KW
01L
(X7R
1812)
68uF 16V Sanyo 16TQC68M
33uF 100V Suncon 100ME33PX (10x12mm)
L1 Vishay IHLP2525EZER1R5M01
L4 Pulse PA2729.802NL
T1 PA0801NL
T3 PA3493NL
VCC
RS+
+VOUT
-VOUT
FG
VIN
-VOUT
VIN
VCC
+VOUT
+VOUT
AS
-VOUT
-VOUT
RS+
RS-
FG
AS
RS-
R41 4.12K
C13 1.0uF 100V 1210
R29
19.1K
C31 1nF
R44 56.2K
R1
51.1 1206
R46 60.4K
R47 15.0K
C21
1uF 0805
C23 1uF 0805
C30 1nF
R10
0.004 2512
R24 100 0402
C28 10nF
C37 1.0nF
C3,C4,C5 2.2uF x3
100V 1210
T3
3
1
6
4
R20 100
Q5 IRF6217
C35
0.1uF
C17 0.1uF
R52 22K
R23 100 0402
R53 8.25K
R19 100
C32 47pF
R49 1.87K
C18 470pF
Q1 FDMS86201
R36
11.5K
R38 100
+
C8,C9 68uF x2
16V
LTC3765EMSE
U1
14
3
2
15
16
12
4
6
7
17
8
10
13
1
9
11
5
NDRV
VCC
PG
IN+
IN-
RUN
AG
DELAY
IS-
GND
IS+
FS/UV
SSFLT
PGND
GND2
G
A
M
SI
E
R
O
C
R
C10 1nF 630V 1206
D3 ZHCS400
D1
ES1PD
R7 909 0805
C16
1nF
Q4 FDMS86200
C2 2.2uF 100V 1210
T1
7
2
3
11
4
5
R4,R5 68.1K x2 = 34K 1206
R18 100K 0805
+
C1 33uF 100V
L1
1.5uH
C24
2.2nF 250V 1812
R56 1.00K
C29 33nF
FMMT491A
Q7
R27 0.75 0805
R51 13.3K
C33 2.2nF
C22 220pF
R37 909 0805
LTC3766EGN
U2
7
2
23
6
14
18
17
1
28
26
25
16
15
9
4
27
22
21
10
5
12
13
11
8
20
3
19
24
ITH
FG
SW
FB
GND
IS+
IS-
SG
VCC
PT+
PT-
REGSD
FS/SYNC
SS
MODE
PGND
VIN
NDRV
IPK
PHASE
VS+
VS-
VSOUT
RUN
FGD/SWB
VSEC
SGD
VAUX
D4 ES1PD
R11 75 0805
Q6 FDC2512
R22
1.82K 1206
R39
100
R17 61.9K 0805
L4
8.0uH
2
1
Q3
FDMS86322
D5
ZHCS400
R14 0.006 2512
R48
4.99K
C6 47pF 200V 1206
C20 0.1uF
C27
10uF
1206
16V
R25 10K
C25
33nF COG 0805
R35
1.82K
C11,C12 22uF x2 16V 1210
C14 0.1uF 1206
R50 604
