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