LTC1871-7 LINER [Linear Technology], LTC1871-7 Datasheet - Page 29

• Manufacturer Part Number: LTC1871-7
• Description: High Input Voltage,Current Mode Boost, Flyback and SEPIC Controller
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIONS
90
85
80
75
70
65
60
0
Output Effi ciency at 3.3V Output
36V
1
IN
1nF
26.7k
82.5k
12.4k
100k
2
72V
I
LOAD
IN
*R2 = 38.3k FOR V
3
R1
604k
R2*
21k
(A)
1
2
4
5
3
A 48V Input Flyback Converter Confi gurable to 3.3V or 5V Outputs
RUN
I
FREQ
MODE/SYNC
V
TH
FB
48V
4
LTC1871-7
IN
5
18717 TA02b
OUT
INTV
SENSE
GATE
MMBTA42
GND
= 5V
V
6
CC
IN
9
7
10
8
6
0.1μF
4.7μF
100k
10V
36V TO 72V
V
IN
2.2μF
100V
CTX-002-15242
T1A
Q1
FDC2512
R3
0.1Ω
90
85
80
75
70
65
60
•
0
•
Output Effi ciency at 5V Output
T1B
36V
ALL CAPACITORS
48V
ARE CERAMIC
1
UPS840
IN
X5R TYPE
IN
72V
2
I
LOAD
IN
100μF
6.3V
×3
18717 TA02a
(A)
3
V
3.3V
3A MAX
LTC1871-7
OUT
4
18717 TA02c
5
29
18717fc