Datasheet

LTC3723-1/LTC3723-2
17
372312f
TYPICAL APPLICATIO S
U
5
46
A
A
10V
V
IN
15
9
174k
1
0.47µF
1µF
V
REF
C
T
220pF
10nF
T2
T1
EFD20
1.13k
21.5k
1.5k
813
Si7456DP
L4
1mH
68µF
20V
•
•
10
8
18
5
4
16
10k
33k
100Ω
1/4W
66.5k
12
7
14
560Ω
383k
30k
SYNC TIMER
LTC3900ES8
6
7
1nF
0.47µF
372312 TA03
V
OUT
+
D1
4.3V
V
OUT
FG
GND
V
CC
5
909Ω
26.1k
CS
+
CS
+
CS
+
FG
FG
CG
V
OUT
V
OUT
CS
–
12
CG
34
Si7456DP
L1
4.7µH
52
3
10V
BAS21
BAS21
•
1
4
•
•
6
+
Si7450DP
1µF
100V
×2
V
IN
V
IN
–V
IN
1.5nF
200V
1µF
100V
47µF
16V
×2
+
1.5nF
10µF
25V
10k
0.1µF
0.1µF
220pF
6
2
2.2nF
250V
220pF
11
5
1
2
5
6
MOC207
1
2
4
V
IN
GND
3
OC
COMP
OPTO
FB
LT4430ES6
1.00k
0.03Ω
1W
158K
1.78K
120pF
L2
15µH
30
85
EFFICIENCY (%)
87
89
91
93
95
40 50 60
OUTPUT POWER (W)
70
80
48V
IN
24Ω
1/4W
12Ω
1/2W
Si7456DP
–V
OUT
Si7456DP
7
8
47µF
16V
×2
+
220pF
220pF
L3
33µH
24Ω
1/4W
12Ω
1/4W
V
REF
CG
C
T
•
2.7k
2.7k
MMBD914
MMBD914
8.66k
MMBT2369
50k
1µF, 100V TDK C3225X7R2A105M (1210)
10µF, 25V TDK C4532X5R1E106M
47µF, 16V SANYO 16TQC47M
D1: MMBZ5229B
L1: COILCRAFT DO1813P-561HC
L2: TDK SLF12575T-150M4R7
L3: TDK SLF10145T-330M1R6
L4: COILCRAFT DO1608C-105
T1: PULSE PA1040
T2: PULSE PA0785 (1:0.5T)
LTC3723EGN-1
DRVB
CS
COMP
SDRB
V
CC
UVLO
DRVA
DPRG V
REF
SPRGGND SS FBC
T
RLEB
750Ω
22nF
V
REF
V
REF
680pF
22nF
15nF
470pF
4.7nF
1k
LTC3723-1 36V
IN
to 72V
IN
to 12V/5A and –12V/1.6A Forward Converter