Datasheet

LT3760
6
3760fc
Typical perForMance characTerisTics
SHDN/UVLO Pin (Hysteresis)
Current vs Junction Temperature
V
IN
Shutdown Current
vs Junction Temperature V
IN
Quiescent Current vs V
IN
V
IN
Quiescent Current
vs Junction Temperature
Switching Frequency
vs Junction Temperature
V
C
High Clamp, Active
and Low Clamp Levels
vs Junction Temperature
LED Current Waveforms
3000:1 PWM Dimming (100Hz)
V
REF
vs Junction Temperature
SHDN/UVLO Threshold
vs Junction Temperature
T
A
= 25°C, unless otherwise noted.
5µs/DIV
I(LEDx)
40mA/DIV
PWM
10V/DIV
I(L1)
1A/DIV
3760 G04
(FRONT COVER
APPLICATION)
JUNCTION TEMPERATURE (°C)
–50
V
REF
VOLTAGE (V)
1.525
1.485
1.465
1.505
1.445
25 100750 50
3760 G05
125–25
JUNCTION TEMERATURE (°C)
–50
SHDN/UVLO PIN VOLTAGE (V)
1.525
1.485
1.465
1.505
1.445
25 100750 50
3760 G06
125–25
JUNCTION TEMPERATURE (°C)
–50
SHDN/UVLO PIN CURRENT (µA)
2.80
2.60
2.50
2.40
2.30
2.70
2.20
25 100750 50
3760 G07
125–25
JUNCTION TEMPERATURE (°C)
–50
V
IN
CURRENT (µA)
5
3
2
1
4
0
25 100750 50
3760 G08
125–25
V
IN
= 6V, SHDN/UVLO = 0V
V
IN
(V)
0
V
IN
CURRENT (mA)
12
6
4
2
8
10
0
15 30 352510 20
3760 G09
405
PWM = 1.5V, NO SWITCHING,
V(LED
1-8
) = 1.2V, CTRL = 0.1V
PWM = 0V, CTRL = 0.1V
R
ISET
= 14.7k
JUNCTION TEMPERATURE (°C)
–50
V
IN
CURRENT (mA)
15
5
10
0
25 100750 50
3760 G10
125–25
V
IN
= 6V, R
ISET
= 14.7k, CTRL = 0.1V
PWM = 1.5V, NO SWITCHING,
V(LED
1-8
) = 1.2V, CTRL = 0.1V
PWM = 0V, CTRL = 0.1V
JUNCTION TEMPERATURE (°C)
–50
SWITCHING FREQUENCY (kHz)
1100
950
1050
1000
900
25 100750 50
3760 G11
125–25
R
T
= 39.2k
JUNCTION TEMPERATURE (°C)
–50
V
C
PIN VOLTAGE (V)
2.5
2.0
1.5
1.0
0.5
0.0
25 100750 50
3760 G12
125–25
V
C
HIGH CLAMP
V
C
LOW CLAMP
V
C
ACTIVE (SWITCHING)