Datasheet

LTC3900
15
3900fb
3900 TA04a
14
11
10
15
8
13
12
16
SD/V
SEC
R
OSC
BLANK
SS
V
R
COMP
FB
OUT
OC
I
SENSE
V
IN
GND
PGND
DELAY
S
OUT
7
3
9
5
6
1
2
5
8
6
7
3
1
2
4
LT1952-1
Si7430
470pF
12.4k
L1: PULSE PA1393.302
L2: COILCRAFT DO1607B-155
ALL CERAMIC CAPS ARE X5R OR X7R
220pF
75k
2k
38.3k
1k
1nF
97.6k
47nF
0.1µF
1µF
13.3k
370k
82k
2.2µF
PZTA42
22k158k
82k
133k
V
U1
T1
PA0423
V
U1
4.7µF
0.010
PE-68386
•
•
7
10
560R
BAS516PDZ10B
1.5mH 3µH
V
U1
1
6
V
IN
36V TO 72V
L2 L1
2
5
•
• •
LTC3900
PDZ7.5
BCX55
47k
10k
1µF
HAT2244
33µF
V
OUT
12V
14A
FB
SYNC
GND
TIMER
CG
CS
+
CS
–
V
CC
10k
20k
Typical applicaTions
I
OUT
(A)
0
90
92
96
6 10
3900 TA04b
88
86
2 4
8 12 14
84
82
94
EFFICIENCY (%)
V
IN
= 48V
V
OUT
= 12V
36V to 72V Input to 12V, 14A Output Converter in 1/8th Brick Footprint
The Efficiency of 12V Output Converter is Over 95% at 8A Output.