lt3592emse-trpbf Linear Technology Corporation, lt3592emse-trpbf Datasheet - Page 5

• Manufacturer Part Number: lt3592emse-trpbf
• Description: 500ma Wide Input Voltage Range Step-down Led Driver With 10 1 Dimming
• Manufacturer: Linear Technology Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
2500
2000
1500
1000
500
3.4
3.3
3.2
3.1
0
–50
600
Undervoltage Lockout
vs Temperature
Frequency Foldback
R
T
= 48.7k
800
1000 1200 1400 1600 1800
0
SHDN VOLTAGE (mV)
TEMPERATURE (°C)
Operating Waveforms
50
100
500ns/DIV
2000
3592 G10
3592 G13
2200
150
2300
2100
1900
1700
1500
1300
1100
3592 G16
900
700
500
300
1.4
1.3
1.2
1.1
0.9
0.8
0.7
0.6
0.5
1
–50
0
Switching Frequency
vs Temperature
Switch Current Limit
V
5V/DIV
V
10mV/DIV
AC COUPLED
I
500mA/DIV
L
SW
CAP
–30 –10
20
TEMPERATURE (°C)
10
DUTY CYCLE (%)
40
30
R
R
R
50
T
T
T
60
= 48.7k
= 140k
= 357k
70
90
80
Operating Waveforms,
Discontinuous Mode
110
3592 G11
3592 G14
(T
A
130
100
= 25°C, unless otherwise noted)
500ns/DIV
1400
1200
1000
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
800
600
400
200
0
–50
0.5
Current Limit During Soft Start
Switch Current Limit
–30 –10
1
TEMPERATURE (°C)
10
3592 G17
V
30
SHDN
TYPICAL
V
5V/DIV
V
10mV/DIV
AC COUPLED
I
500mA/DIV
1.5
L
SW
CAP
50
(V)
LT3592
70
2
90 110
3592 G12
3592 G15
5
3592f
130
2.5