LT3498EDDB 查看數據表（PDF） - Linear Technology
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LT3498EDDB
Linear Technology
LT3498EDDB Datasheet PDF : 24 Pages
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LT3498
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise specified.
Shutdown Current
(VCTRL1 = VCTRL2 = 0V)
15
T = –50°C
12
9
T = 25°C
T = 125°C
6
3
0
0
2
4
6
8 10 12
VIN (V)
3498 G01
Sense Voltage (VCAP1 – VLED1)
vs VCTRL1
240
T = 25°C
T = –50°C
200
T = 125°C
160
120
80
40
0
0
500
1000
1500
2000
VCTRL1 (mV)
3498 G04
LED Current Limit
vs Temperature
500
450
400
350
300
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3498 G07
4
LED Switch Saturation
Voltage (VCESAT1)
500
450
T = –50°C
400
350
300
T = 25°C
T = 125°C
250
200
150
100
50
0
0 50 100 150 200 250 300 350 400
SWITCH CURRENT (mA)
3498 G02
Sense Voltage (VCAP1 – VLED1)
vs Temperature
206
202
198
194
190
186
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
3498 G05
Open Circuit Output
Clamp Voltage
29
28
T = –50°C
27
T = 150°C
26
T = 25°C
25
0
2
4
6
8 10 12
VIN (V)
3498 G08
LED Schottky Forward
Voltage Drop
400
350
T = 125°C
300
250
200
T = 25°C
150
100
T = –50°C
50
0
0
200 400 600 800 1000
SCHOTTKY FORWARD DROP (mV)
3498 G03
Sense Voltage (VCAP1 – VLED1)
vs VCAP1
206
202
198
T = 125°C
194
T = –50°C
T = 25°C
190
186
0
5
10
15
20
25
CAP1 VOLTAGE (V)
3498 G06
Input Current in Output
Open Circuit
6
5
4
T = 150°C
T = 25°C
3
T = –50°C
2
1
0
2
4
6
8
VIN (V)
10
12
3498 G09
3498fa
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