lt3595a Linear Technology Corporation, lt3595a Datasheet - Page 4

• Manufacturer Part Number: lt3595a
• Description: 16 Channel Buck Mode Led Driver
• Manufacturer: Linear Technology Corporation

LT3595A
TYPICAL PERFORMANCE CHARACTERISTICS
4
50mA/DIV
50mA/DIV
10 LEDS
10 LEDS
50V/DIV
50V/DIV
5 LEDS
5 LEDS
0.001
V
V
0.01
100
SW1
SW2
0.1
10
I
I
L1
L2
1
0.01
LED Current vs PWM Duty Cycle
Wide Dimming Range (5000:1)
Switching Waveforms
V
I
LED
V
10 LEDS AT 20mA
PWM FREQUENCY = 100Hz
IN
IN
= 45V
= 20mA
= 45V
0.1
DUTY CYCLE (%)
400ns/DIV
20
18
16
14
12
10
8
6
4
2
0
1
0
V
V
CC
CC
= 3.3V
Quiescent Current
1
10
2
3595A G04
3595A G01
T = 125°C
3
V
100
CC
(V)
4
20mA/DIV
20mA/DIV
5V/DIV
PWM
5
I
T = –40°C
LED
60
50
40
30
20
10
0
I
L
25
T = 25°C
PWM Dimming Waveforms
(1000:1)
V
10 LEDS AT 20mA
LED Current vs R
IN
6
3595A F07
= 40V
7
50
R
SET
RESISTANCE (kΩ)
75
2μs/DIV
PWM FREQUENCY = 100Hz
t
ON
SET
= 10μs
100
Resistance
100
20
80
60
40
0
0
SHDN Pin Bias Current
125
T
3595A G05
A
3595A G02
1
= 25°C, unless otherwise noted.
150
2
T = 125°C
20mA/DIV
20mA/DIV
SHDN (V)
5V/DIV
PWM
3
I
2.0
1.6
0.8
0.4
LED
1.2
0
I
T = 25°C
L
0
PWM Dimming Waveforms
(10:1)
V
10 LEDS AT 20mA
V
IN
IN
4
= 40V
Quiescent Current
T = –40°C
10
5
3595A F08
20
6
2ms/DIV
V
PWM FREQUENCY = 100Hz
t
ON
T = 125°C
T = –40°C
IN
T = 25°C
(V)
= 1ms
30
40
3595A G06
3595A G03
3595af
50