Datasheet

LT3597
6
3597fa
Typical perForMance characTerisTics
Loop Regulation Voltage LED Current LED Current Matching
LED Current vs PWM Duty Cycle LED Current vs CTRL Adaptive Loop Operation
Boost Diode V
F
Soft-Start 60V Switching Waveforms
T
A
= 25°C, unless otherwise noted.
0
DIODE V
F
(mV)
400
500
600
700
300
200
100
10
3597 G10
0
800
8642
DIODE CURRENT (mA)
–40°C
25°C
125°C
V
OUT
20V/DIV
I
L
100mA/DIV
V
SW
20V/DIV
V
EN/UVLO
5V/DIV
3597 G11
400µs/DIV
V
OUT
20V/DIV
I
L
100mA/DIV
V
SW
20V/DIV
3597 G12
400ns/DIV
–50
VOLTAGE (V)
1.1
1.2
1.0
75 125
3597 G13
0.9
1.4
1.3
50250–25 100
V
FB
TEMPERATURE (°C)
V
LED
(ADAPTIVE LOOP)
–50
LED CURRENT (mA)
99
100
98
75 125
3597 G14
97
103
101
102
50250–25 100
CH2
CH3
TEMPERATURE (°C)
CH1
–50
LED CURRENT MATCHING (%)
0
0.25
–0.25
75 125
3597 G15
–0.50
0.50
50250–25 100
CH2
CH3
TEMPERATURE (°C)
CH1
0.001
LED CURRENT (mA)
0.1
1
0.01
0.001
100
3597 G16
0.0001
100
10
1010.10.01
DUTY CYCLE (%)
0
LED CURRENT (mA)
60
80
40
20
1.5
3597 G17
0
120
100
1.2510.750.50.25
CTRL VOLTAGE (V)
V
OUT
10V/DIV
V
LED
10V/DIV
I
LED
100mA/DIV
V
SW
20V/DIV
3597 G18
400µs/DIV