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LT1425CS Datasheet(PDF) 4 Page - Linear Technology

Part # LT1425CS
Description  Isolated Flyback Switching Regulator
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1425CS Datasheet(HTML) 4 Page - Linear Technology

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4
LT1425
TYPICAL PERFORMANCE CHARACTERISTICS
Feedback Amplifier Output
Current vs RREF Pin Voltage
RREF NODE VOLTAGE (V)
1.05
60
40
20
0
–20
–40
–60
–80
1.20
1.30
1425 G04
1.10
1.15
1.25
1.35
1.40
25
°C
125
°C
–55
°C
TEMPERATURE (
°C)
–50
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
25
75
1425 G06
–25
0
50
100
125
VC HIGH CLAMP
VC THRESHOLD
VC Pin Threshold and High Clamp
Voltage vs Temperature
TEMPERATURE (
°C)
–50
1400
1200
1000
800
600
400
200
0
25
75
1425 G05
–25
0
50
100
125
Error Amplifier Transconductance
vs Temperature (RREF Referred)
Switching Frequency vs
Temperature
SHDN Pin Input Current vs
Voltage
Minimum Synchronization
Voltage vs Temperature
TEMPERATURE (
°C)
–50
300
295
290
285
280
275
270
265
25
75
1425 G07
–25
0
50
100
125
TEMPERATURE (
°C)
–50
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
25
75
1425 G08
–25
0
50
100
125
SHDN PIN VOLTAGE (V)
0
1
0
–1
–2
–3
–4
4
1425 G09
1
2
3
5
TA = 25°C
Minimum Switch ON Time vs
Temperature
Flyback Enable Delay Time vs
Temperature
TEMPERATURE (
°C)
–50
300
275
250
225
200
175
150
125
25
75
1425 G10
–25
0
50
100
125
TEMPERATURE (
°C)
–50
250
225
200
175
150
125
100
75
25
75
1425 G11
–25
0
50
100
125
TEMPERATURE (
°C)
–50
275
250
225
200
175
150
125
100
25
75
1425 G12
–25
0
50
100
125
Minimum Flyback Enable Time vs
Temperature



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