Datasheet

LTC3873
13
3873fa
TYPICAL APPLICATIONS
9V to 15V V
IN
, 12V V
OUT
SEPIC Converter
I
PRG
I
TH
V
FB
= 1.2V
GND
SW
RUN/SS
V
CC
NGATE
1
2
3
4
8
7
6
5
LTC3873
4.7µF
10nF
100k
11k33.2k
301
0.1µF
3873 TA05
Si4840
UPS840
T1
4.56µH
BH510-1009
BH ELECTRONICS
100µF
20V
V
IN
9V TO 15V
10µF
25V
10µF
s3
+
47µF
16V
s3
10µF
16V
V
OUT
12V
2A
+
1
••
2
4
3
10W Isolated Telecom Converter
I
RPG
81
I
SENSE
I
TH
72
RUN/SS
FB
63
V
CC
GND
5
4.7µF
1210
AND
0805
0.1µF
BAT760
0.068
FDC2512
51
BAS516
2
5
••
•
1
4
8
9
21
BAT54CWT1G
3
10
7
TR1
ISOLATION BARRIER
4
GATE
LTC3873
V
IN
61
OPTO
GND
52
COMP
OC
43
0.6V FB
LT4430
22nF
3.01k
100k
221k
OPT
PDZ6.8B
OPT
2.2
UPS840
6.8k
4
3
1
NEC
PS2801-1
2
2200pF
250V AC
1µF
OPT
1µF
100µF
6.3V
s3
V
OUT
3.3V
3A
330pF
4.7µF
100V
V
IN
36V TO 72V
221k
274
BAS516
22.1k
3873 TA04
MMBTA42
OPT