ltc4268cdkd-1-trpbf Linear Technology Corporation, ltc4268cdkd-1-trpbf Datasheet - Page 8

• Manufacturer Part Number: ltc4268cdkd-1-trpbf
• Description: High Power Pd With Synchronous Noopto Flyback Controller
• Manufacturer: Linear Technology Corporation

LTC4268-1
TYPICAL PERFORMANCE CHARACTERISTICS
8
1700
1650
1600
1550
1500
1450
1400
1350
1300
1250
1200
1150
1100
–10
–30
–70
–50
23
22
21
20
19
18
17
16
15
10
70
50
30
–50
–50
0.9
Feedback Amplifi er Output
Current vs V
Feedback Amplifi er Voltage Gain
vs Temperature
Soft-Start Charge Current vs
Temperature
–25
–25
1
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
1.1
FB
25
25
V
FB
1.2
(V)
50
50
125°C
1.3
75
75
–40°C
1.4
100
100
25°C
42681 G25
42681 G22
42681 G19
125
125
1.5
1.250
1.245
1.220
1.240
1.235
1.230
1.225
80
70
60
50
40
30
20
10
70
65
50
40
60
55
45
0
–50
–50
0
Feedback Amplifi er Source and
Sink Current vs Temperature
UVLO vs Temperature
PG, SG Rise and Fall Times vs
Load Capacitance
T
A
= 25°C
1
–25
–25
2
0
0
TEMPERATURE (°C)
3
TEMPERATURE (°C)
CAPACITANCE (nF)
FALL TIME
SOURCE CURRENT
4
25
25
5
50
50
V
6
FB
RISE TIME
= 1.1V
75
7
75
V
CURRENT
FB
8
SINK
100
100
= 1.4V
42681 G23
42681 G26
42681 G20
9
125
125
10
1050
1100
1000
21.5
21.0
20.5
20.0
19.5
19.0
950
900
3.7
3.4
3.0
3.6
3.5
3.3
3.2
3.1
–50
–50
–50 –25
Feedback Amplifi er g
Temperature
I
V
Temperature
UVLO
I
CC
CC
–25
–25
= 10mA
Clamp Voltage vs
Hysteresis vs Temperature
0
0
0
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
25
25
25
50
50
50
m
vs
75
75
75
100
100
100
42681 G21
42681 G24
42681 G27
42681fa
125
125
125