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LTG4 Datasheet(PDF) 29 Page - Linear Technology

Part # LTG4
Description  High Input Voltage,Current Mode Boost, Flyback and SEPIC Controller
PDF  32 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTG4 Datasheet(HTML) 29 Page - Linear Technology

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LTC1871-7
29
18717fc
TYPICAL APPLICATIONS
Output Efficiency at 3.3V Output
A 48V Input Flyback Converter Configurable to 3.3V or 5V Outputs
Output Efficiency at 5V Output
9
7
10
8
6
1
2
4
5
3
100k
100k
VIN
36V TO 72V
10V
26.7k
82.5k
12.4k
R2*
21k
*R2 = 38.3k FOR VOUT = 5V
R1
604k
1nF
0.1μF
2.2μF
100V
100μF
6.3V
×3
VOUT
3.3V
3A MAX
T1B
UPS840
CTX-002-15242
T1A
•
•
Q1
FDC2512
ALL CAPACITORS
ARE CERAMIC
X5R TYPE
R3
0.1Ω
4.7μF
18717 TA02a
RUN
ITH
FREQ
MODE/SYNC
VFB
VIN
GATE
SENSE
INTVCC
GND
LTC1871-7
MMBTA42
ILOAD (A)
0
60
65
70
75
80
90
1
234
18717 TA02b
56
85
36VIN
48VIN
72VIN
ILOAD (A)
0
60
65
70
75
80
90
1
234
18717 TA02c
5
85
36VIN
48VIN
72VIN



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