LT1935 데이터 시트보기 (PDF) - Linear Integrated System
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LT1935 Datasheet PDF : 8 Pages
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TYPICAL PERFOR A CE CHARACTERISTICS
FB Pin Voltage
1.28
1.27
1.26
1.25
1.24
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1935 G01
Oscillator Frequency
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1935 G02
Current Limit
4
TA = 25°C
3
TYP
MIN
2
1
Switch Saturation Voltage
400
300
TA = 85°C
200
TA = 25°C
100
LT1935
Undervoltage Lockout
2.4
2.3
2.2
2.1
2.0
1.9
1.8
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
1935 G03
Peak Switch Current vs SHDN Pin
Voltage (Soft-Start)
4
50% DUTY CYCLE
TA = 25°C
3
2
1
0
0
20
40
60
80 100
DUTY CYCLE (%)
1935 G04
0
0 0.5 1.0 1.5 2.0 2.5 3.0
SWITCH CURRENT (A)
1935 G05
0
0
0.5
1.0
1.5
2.0
SHDN VOLTAGE (V)
1935 G06
SHDN Pin Current
80
TA = 25°C
60
40
20
0
0 2 4 6 8 10 12 14 16
SHDN PIN VOLTAGE (V)
1935 G07
Frequency Foldback
1.4
TA = 25°C
1.2
1.0
0.8
0.6
0.4
0.2
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
FEEDBACK VOLTAGE (V)
1935 G08
1935f
3
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