lt3517 Linear Technology Corporation, lt3517 Datasheet - Page 5

• Manufacturer Part Number: lt3517
• Description: Full-featured Led Driver With 1.5a Switch Current
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
1.03
1.02
1.00
0.99
0.98
1.04
1.01
104
103
102
101
100
105
104
103
102
101
100
99
98
97
96
99
98
97
96
95
–40
–40
0
V
Temperature
FB Pin Threshold vs Temperature
V
V
V
V
V
V
V
V
T
V
ISP
ISP
IN
IN
ISP
C
CTRL
–20 0
CTRL
IN
A
C
–20 0
= 1V
= 25°C
= 1V
= 5V
= 5V
= 5V
– V
= 24V
– V
= 2V
= 2V
10
ISN
ISN
20 40
20
TEMPERATURE (°C)
TEMPERATURE (°C)
Threshold vs
Threshold vs V
40
20
V
ISP
60 80
60 80 100 120 140 160
(V)
30
100 120
ISP
40
140 160
3517 G10
3517 G04
3517 G07
50
PWM
TG
1.99
2.02
2.01
2.00
1.98
40V
30V
1.5
2.5
2.0
1.0
0.5
5V
0V
0
–40
–40 –20
Switch Current Limit vs
Temperature
PMOS Turn-On
V
Reference Voltage vs
Temperature
V
ISP
V
IN
IN
–20 0
= 40V
= 5V
= 5V
0
20
20 40
TEMPERATURE (°C)
TEMPERATURE (°C)
40 60
200ns/DIV
60 80 100 120 140 160
80 100 120 140 160
3517 G11
3518 G05
3517 G08
PWM
TG
40V
30V
2.1
1.5
2.5
2.3
1.9
1.7
5V
0V
8
7
6
5
4
3
2
1
0
–40 –20
0
Quiescent Current vs V
PMOS Turn-Off
V
Oscillator Frequency vs
Temperature
V
R
T
V
ISP
IN
A
T
C
= 6.04k
= 25°C
= 0V
= 5V
= 40V
0
10
20
TEMPERATURE (°C)
40 60
200ns/DIV
V
IN
20
(V)
80
LT3517
100 120 140
IN
30
3517 G06
3517 G12
3517 G09
5
3517f
160
40