LT3599
TYPICAL PERFORMANCE CHARACTERISTICS T A = 25°C unless otherwise speci?ed
2500
2000
V C Pin Active and Clamp Voltages
V C HIGH
100
LED Current vs PWM Duty Cycle
0.40
0.35
Switch Saturation Voltage
1500
10
0.30
0.25
1000
500
V C ACTIVE
1
0.1
0.20
0.15
0.10
0.05
0
0.01
0
–50 –25
0
25
50
75
100 125 150
0.01
0.1
1 10
100
0
0.5
1
1.5
2
2.5
2.8
2.4
2.0
1.6
1.2
0.8
JUNCTION TEMPERATURE (°C)
Switch Current Limit
3599 G10
1250
1245
1240
1235
1230
1225
1220
1215
1210
1205
PWM DUTY CYCLE (%)
Feedback Pin Voltage
3599 G11
101
100
99
98
I SW (A)
LED Current vs Temperature
3599 G12
0.4
–50 –25
0
25
50
75
100 125 150
1200
–50 –25
0
25
50
75
100 125 150
97
–50 –25
0
25
50
75
100 125 150
JUNCTION TEMPERATURE (°C)
3599 G13
JUNCTION TEMPERATURE (°C)
3599 G14
JUNCTION TEMPERATURE (°C)
3599 G15
PWM
5V/DIV
SW
20V/DIV
I LED1
50mA/DIV
LED Current Waveforms
(0.1% PWM) (10ms Period)
PWM
5V/DIV
SW
20V/DIV
I LED1
50mA/DIV
LED Current Waveforms
(90% PWM) (10ms Period)
2μs/DIV
3599 G16
100μs/DIV
3599 G17
3599fe
6
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