LTC3873_15 Datasheet, PDF (13/16 Pages) Linear Technology – Frequency Current Mode Boost/Flyback/SEPIC DC/DC Controller

TYPICAL APPLICATIONS
9V to 15V V_IN, 12V V_OUT SEPIC Converter
LTC3873
V_IN
9V TO 15V
301Ω
10μF ⁺
s3
T1
4.56μH
BH510-1009
BH ELECTRONICS
1
4
••
100μF
20V ₂
3
10μF
25V
UPS840
+
100k
LTC3873
1
I_PRG
8
SW
Si4840
2
7
I_TH RUN/SS
10nF
3
6
V_FB = 1.2V V_CC
33.2k 11k ^{4 GND NGATE 5}
4.7μF
0.1μF
3873 TA05
47μF
16V
s3
V_OUT
12V
2A
10μF
16V
V_IN
36V TO 72V
10W Isolated Telecom Converter
4.7μF
100V
221k
OPT
PDZ6.8B
OPT
MMBTA42
OPT
LTC3873
1 _{IRPG ISENSE} 8
2 _{ITH RUN/SS} 7
3 _FB
V_CC ⁶
4 _{GND GATE} 5
TR1
ISOLATION BARRIER
7
4• • 8
1
221k
BAS516 _51Ω
5•
2
9
UPS840
10
FDC2512
2.2Ω
21
100μF
6.3V
s3
0.068Ω
4.7μF
1210
AND
0805
0.1μF
6.8k
BAT760
4
NEC
PS2801-1
1
BAT54CWT1G
3
1μF
OPT
274Ω
BAS516
LT4430
1 _{VIN OPTO} 6
2 _{GND COMP} 5
3 _{OC 0.6V FB} 4
V_OUT
3.3V
3A
100k
22nF
3.01k
22.1k
330pF
3
2
1μF
3873 TA04
2200pF
250V AC
3873fa
13