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LTC4278 Datasheet(PDF) 8 Page - Linear Technology

Part # LTC4278
Description  Synchronous No-Opto Flyback Controller
Download  42 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4278 Datasheet(HTML) 8 Page - Linear Technology

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LTC4278
8
4278fc
TEMPERATURE (°C)
–50
1.240
1.245
1.250
25
75
4278 G23
1.235
1.230
–25
0
50
100
125
1.225
1.220
TEMPERATURE (°C)
–50
3.4
3.5
3.7
25
75
4278 G24
3.3
3.2
–25
0
50
100
125
3.1
3.0
3.6
TEMPERATURE (°C)
–50
23
25
4278 G25
20
18
–25
0
50
17
16
15
22
21
19
75
100 125
CAPACITANCE (nF)
0
80
70
60
50
40
30
20
10
0
8
4278 G26
2
4
6
10
7
1
3
5
9
TA = 25°C
FALL TIME
RISE TIME
TYPICAL PERFORMANCE CHARACTERISTICS
UVLO vs Temperature
IUVLO Hysteresis vs Temperature
Soft-Start Charge Current
vs Temperature
PG, SG Rise and Fall Times
vs Load Capacitance
TEMPERATURE (°C)
–50
60
65
70
25
75
4278 G20
55
50
–25
0
50
100 125
45
40
SOURCE CURRENT
VFB = 1.1V
SINK
CURRENT
VFB = 1.4V
TEMPERATURE (°C)
–50
900
950
1000
1050
1100
–25
0
25
50
4278 G21
75
100 125
Feedback Amplifier Source and
Sink Current vs Temperature
Feedback Amplifier gm
vs Temperature
TEMPERATURE (°C)
–50
1550
25
4278 G22
1400
1300
–25
0
50
1250
1200
1150
1100
1600
1650
1700
1500
1450
1350
75
100 125
Feedback Amplifier Voltage Gain
vs Temperature


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