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B120 View Datasheet(PDF) - Linear Technology

Part Name
Description
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B120
Linear
Linear Technology Linear
B120 Datasheet PDF : 20 Pages
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LT3474/LT3474-1
TYPICAL PERFORMANCE CHARACTERISTICS
LED Current vs VADJ
1000
TA = 25°C
800
600
400
200
0
0
0.25 0.5 0.75
1
1.25
VADJ (V)
3474 GO3
Current Limit vs Duty Cycle
2.5
LED Current vs Temperature
1200
1000
VADJ = VREF
800
600
400
VADJ = VREF/5
200
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3474 G04
Switch Current Limit vs
Temperature
2.5
2
2
TYPICAL
MINIMUM (85°C)
1.5
1.5
MINIMUM (125°C)
1
1
0.5
0.5
0
0
20
40
60
80 100
DUTY CYCLE (%)
3474 G06
Oscillator Frequency vs RT
TA = 25°C
1000
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3474 G07
Oscillator Frequency vs
Temperature
600
RT = 80.6k
550
500
450
100
10
100
RT (kΩ)
3474 G09
400
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3474 G10
4
Switch Voltage Drop
700
TA = 25°C
600
500
400
300
200
100
0
0
500
1000
SWITCH CURRENT (mA)
1500
3474 G05
Current Limit vs Output Voltage
2.5
TA = 25°C
2
1.5
1
0.5
0
0
2
4
6
8
10 12
VOUT (V)
3474 G08
Oscillator Frequency Foldback
600
TA = 25°C
RT = 80.6k
500
400
300
200
100
0
0 0.5
1
1.5
VOUT (V)
2
2.5
3474 G11
3474fd
 

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