Datasheet

LT3476
4
3476fb
TEMPERATURE (°C)
–45
V(CAP-LED) THRESHOLD (mV)
106
107
108
30 80
3476 G04
105
104
–20 5
55 130105
103
102
DUTY CYCLE (%)
0
CURRENT LIMIT (A)
1.5
2
2.5
80
3476 G02
1
0.5
0
20
40
60
100
TYPICAL
MINIMUM
–45 30 80
–20 5
55 130105
TEMPERATURE (°C)
0
CURRENT LIMIT (A)
1
2.5
3476 G05
0.5
2
1.5
R
T
(kΩ)
1
100
F
OSC
(kHz)
1000
10000
10010
1000
3476 G03
V(CAP-LED) Threshold vs V
ADJ
V(CAP-LED) Threshold
vs Temperature, V
ADJ
= V
REF
Current Limit vs Duty Cycle
Switch Current Limit
vs Temperature
Oscillator Frequency vs R
T
–45 30 80
–20 5
55 130105
TEMPERATURE (°C)
OSCILLATOR FREQUENCY (kHz)
3476 G06
R
T
= 21k
1050
1100
1150
1000
950
900
850
Oscillator Frequency
vs Temperature
TEMPERATURE (°C)
1.040
V
REF
(V)
1.050
1.065
3476 G07
1.045
1.060
1.055
–45 30 80
–20 5
55 130105
Reference Voltage
V
CAP
(V)
102
V(CAP-LED) THRESHOLD (mV)
106
3476 G08
105
104
103
108
107
0 10
20
5 15
25
3530
V
ADJ
= 1.05V
V(CAP-LED) Threshold vs V(CAP)
V
IN
(V)
0
INPUT CURRENT (mA)
10
15
16
3476 G09
5
0
4
8
12
25
20
PWM 1-4 = 3.6V
PWM 1-4 = 0V
V
C
= GND, NOT SWITCHING
T
A
= 25°C
Quiescent Current
V
ADJ
(V)
0 0.3
0
V(CAP-LED) THRESHOLD (mV)
60
150
0.6 0.9
3476 G01
30
120
90
1.2
1.5
T
A
= 25°C
typicAl perForMAnce chArActeristics
T
A
= 25°C, unless otherwise noted.