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LT3757IMSE(RevB) 데이터 시트보기 (PDF) - Linear Technology
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LT3757IMSE
(Rev.:RevB)
Boost, Flyback, SEPIC and Inverting Controller
Linear Technology
LT3757IMSE Datasheet PDF : 36 Pages
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LT3757
Typical Performance Characteristics
T
A
= 25°C, unless otherwise noted.
INTV
CC
vs Temperature
7.4
7.3
7.2
7.1
7.0
–75 –50 –25 0 25 50 75 100 125 150
TEMPERATURE (°C)
3757 G13
INTV
CC
Minimum Output Current
vs V
IN
90
T
J
= 150°C
80
70
60
50
INTV
CC
= 6V
40
INTV
CC
= 4.5V
30
20
10
0
0 5 10 15 20 25 30 35 40
V
IN
(V)
3757 G14
INTV
CC
Load Regulation
7.3
V
IN
= 8V
7.2
7.1
7
6.9
6.8
0 10 20 30 40 50 60 70
INTV
CC
LOAD (mA)
3757 G15
INTV
CC
Line Regulation
7.30
7.25
7.20
7.15
7.10
0
5 10 15 20 25 30 35 40
V
IN
(V)
3757 G16
INTV
CC
Dropout Voltage
vs Current, Temperature
700
V
IN
= 6V
600
125°C
500
150°C
75°C
400
25°C
300
0°C
200
–55°C
100
0
0
5
10
15
20
INTV
CC
LOAD (mA)
3757 G17
Gate Drive Rise
and Fall Time vs C
L
90
INTV
CC
= 7.2V
80
70
60
RISE TIME
FALL TIME
50
40
30
20
10
0
0
5 10 15 20 25 30
C
L
(nF)
3757 G18
Gate Drive Rise
and Fall Time vs INTV
CC
30
C
L
= 3300pF
25
RISE TIME
20
FALL TIME
15
10
5
0
3
6
9
12
INTV
CC
(V)
Typical Start-Up Waveforms
V
IN
= 12V
V
OUT
5V/DIV
I
L1A
+ I
L1B
5A/DIV
15
3757 G19
2ms/DIV
PAGE 31 CIRCUIT
3757 G20
FBX Frequency Foldback
Waveforms During Overcurrent
V
OUT
10V/DIV
V
IN
= 12V
V
SW
20V/DIV
I
L1A
+ I
L1B
5A/DIV
50µs/DIV
PAGE 31 CIRCUIT
3757 G21
3757fb
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