AME, Inc.
AME5142
Current Limit vs. V
IN
1000
White LED Boost Converter
In Tiny Package
V
FB
vs. Temperature
0.177
950
0.173
0.169
0.165
Current Limit (mA)
900
850
800
750
700
650
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
V
FB
(V)
0.161
0.157
0.153
0.149
0.145
0.141
0.137
-25
0
25
50
75
100
125
V
IN
(V)
Temperature (
o
C)
Dimming Control for Driving 6LEDs
Dimming Control for Driving 6LEDs
2
2
3
3
1
1
1mS / div
1mS / div
V
IN
= 2.7V; 6 LEDs
I
OUT
= 20mA
2) EN = 1V / div, DC f = 200Hz
3) V
OUT
, 10V / div, DC
1) V
SW
= 10V / div, DC
V
IN
= 5.5V; 6 LEDs
I
OUT
= 20mA
2) EN = 1V / div, DC f = 200Hz
3) V
OUT
, 10V / div, DC
1) V
SW
= 10V / div, DC
12
Rev. A.01