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