Datasheet

LTC3900
14
3900fb
Typical applicaTions
I
OUT
(A)
0
90
92
96
6 10
3900 TA03b
88
86
2 4
8 12 14
84
82
94
EFFICIENCY (%)
V
IN
= 24V
V
OUT
= 14V
By Using Active Reset and 60V MOSFETs Converter is Achieving 94% to 95%
Efficiency with Only Four MOSFETs.
Si3459
BAS516
0.1µF
0.1µF
255R
10k
0.004R
40R2-4421.003
HAT2266
×2
BAS521
680µH
BAS516
PZTA42
PDZ10B
1.5mH
V
U1
1
6
6.8µF
×4
V
IN
18V TO 40V
V
IN
22k
7
11
•
•
V
U1
BAS516
255R
220pF
LTC4441
57.6k
332k
2.2µF
V
R
PGND
BL
R
BL
SGND
IN
OUT
DRV
CC
V
IN
FB
EN
1
2
3
4
5
10
9
8
7
6
16
15
14
13
12
11
10
9
COMP
FB = 1.23V
R
OSC
SYNC
MAXDC
V
R
= 2.5V
SD
GND
S
OUT
V
IN
OUT
PGND
DELAY
OC
I
SENSE
BLANK
1
2
3
4
5
6
7
8
LT1952-1
22k
158k
13.3k
165k
22k
V
FB
V
U1
S
OUT
GATE
82k
2K
158k
0.1µF
0.47µF
V
FB
BC857BF
33k
115k
V
IN
V
R
4.7µF
220R
1µF 1.2k
PS2801-1
V
OUT1
2.2nF
1µF
BAS516
270R
LT4430
V
AUX
3.65k
15nF
33pF
1.96k
82.5k
V
CC
GND
OC
OPTO
COMP
FB
1
2
3
6
5
4
3900 TA03a
V
OUT1
14V
14A
HAT2266
PA1494.362
33µF
150µF
PXE
FG
2, 3
4, 5
•
CG
+
1k
560R
PE-68386
GATE
BCX55
PDZ7.5B
FG
470pF
220pF
CG
V
AUX
0.22µF
1µF
10k
82k
47k
V
AUX
10k
LTC3900
CS
+
CS
–
CG
V
CC
SYNC
TIMER
GND
FG
1
2
3
4
8
7
6
5
•
•
PGND
18V to 40V Input to 14V at 14A Output Converter in 1/4 Brick Footprint