LT3474/LT3474-1
TYPICAL PERFORMANCE CHARACTERISTICS
60
50
40
30
20
10
Boost Pin Current
T A = 25°C
3.0
2.5
2.0
1.5
1.0
0.5
Quiescent Current
T A = 25°C
1.260
1.255
1.250
1.245
1.240
Reference Voltage
0
0
250
500 750 1000
1250
1500
0
0
6
12
18
24
30
36
1.235
–50
–25
0
25
50
75
100
125
SWITCH CURRENT (mA)
Schottky Reverse Leakage
3473 G12
V IN (V)
3474 G13
Schottky Forward Voltage Drop
TEMPERATURE (°C)
3474 G14
Open-Circuit Output Voltage and
Input Current
20
15
V R = 5V
500
400
T A = 25°C
60
50
T A = 25°C
INPUT CURRENT
LT3474-1
8
7
6
10
5
300
200
40
30
20
LT3474
LT3474-1
LT3474
5
4
3
2
100
10
OUTPUT VOLTAGE
1
0
–50
–25
0 25 50
75
100
125
0
0
200
400
600
800
1000
0
0
10
20
30
40
0
TEMPERATURE (°C)
3474 G15
FORWARD VOLTAGE (mV)
3474 G19
V IN (V)
3474 G16
6
5
4
Minimum Input Voltage,
One White Luxeon III Star
T A = 25°C
TO START
TO RUN
LED VOLTAGE
10
9
8
Minimum Input Voltage,
Two Series Connected White
Luxeon III Stars
T A = 25°C
TO START
3
7 TO RUN
2
1
6
LED VOLTAGE
0
0
200
400 600 800
1000
5
0
200
400
600
800
1000
LED CURRENT (mA)
3474 G17
LED CURRENT (mA)
3474 G18
3474fd
5
相关PDF资料
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