Datasheet

LT3597
7
3597fa
Typical perForMance characTerisTics
Shorted LEDs Fault
FAULT Pin Voltage Low
T
SET
Voltage for Temperature
Derating
T
SET
LED Current Derating
20,000:1 PWM Dimming (100Hz) 1,000:1 PWM Dimming (100Hz)
Open LED Fault
T
A
= 25°C, unless otherwise noted.
I
LED
50mA/DIV
PWM
2V/DIV
3597 G19
100ns/DIV
I
LED
50mA/DIV
PWM
2V/DIV
3597 G20
2µs/DIV
V
FAULT
5V/DIV
I
LED
100mA/DIV
V
LED
2V/DIV
V
OUT
5V/DIV
3597 G21
20ms/DIV
V
FAULT
5V/DIV
I
LED
100mA/DIV
V
LED
5V/DIV
V
OUT
5V/DIV
3597 G22
10ms/DIV
0
FAULT PIN VOLTAGE (mV)
100
150
50
0.6 1
3597 G23
0
400
200
250
300
350
0.40.2 0.8
FAULT PIN CURRENT (mA)
125°C
25°C
40°C
–50
T
SET
VOLTAGE (V)
0.4
0.5
75 125
3597 G24
0.3
0.8
0.6
0.7
50250–25 100
TEMPERATURE (°C)
25
LED CURRENT (mA)
40
20
60
65 85 125
3597 G25
0
120
80
100
45 105
TEMPERATURE (°C)
V
TSET
= 0.675V