Datasheet

LT3596
7
3596fa
PWM Dimming Waveforms
(Nonoverlapping PWM Signals)
10,000:1 PWM Dimming at 100Hz
PWM Dimming Waveforms
(Overlapping PWM Signals)
Typical perForMance characTerisTics
T
A
= 25°C, unless otherwise noted
I
LED
50mA/DIV
PWM
2V/DIV
200ns/DIV
3596 G19
1,000:1 PWM Dimming at 100Hz
I
LED
50mA/DIV
PWM
2V/DIV
2µs/DIV
3596 G20
I
LED1
100mA/DIV
I
LED2
100mA/DIV
PWM1
5V/DIV
PWM2
5V/DIV
2ms/DIV
3596 G21
I
LED1
100mA/DIV
I
LED2
100mA/DIV
PWM1
5V/DIV
PWM2
5V/DIV
2ms/DIV
3596 G22
LED Open-Fault Waveforms
I
LED1
100mA/DIV
V
SW
50V/DIV
V
LED
1V/DIV
V
OUT
20V/DIV
20µs/DIV
3596 G23
LED Short to V
OUT
Waveforms
V
LED
20V/DIV
V
FAULT
5V/DIV
I
LED
100mA/DIV
V
OUT
20V/DIV
10ms/DIV
3596 G24
FAULT Output Voltage V
TSET
for LED Current Derating
I
FAULT
(mA)
0
0
FAULT VOLTAGE (mV)
200
400
600
800
0.25 0.5 0.75 1
3596 G25
1.25 1.5 1.75 2
T = 125°C
T = 25°C
T = –40°C
TSET LED Current Derating
TEMPERATURE (°C)
–50 –25
0.3
V
TSET
(V)
0.5
0.8
0
50
75
3596 G26
0.4
0.7
0.6
25
100
125
TEMPERATURE (°C)
25
I
LED
(mA)
60
80
100
105
3596 G27
40
20
0
45
65
85
125
V
TSET
= 0.68V