AME, Inc.
AME5142
Max Duty Cycle vs. Temperature
92.0
91.8
91.6
91.4
91.2
91.0
90.8
90.6
90.4
90.2
90.0
89.8
89.6
89.4
89.2
89.0
88.8
88.6
88.4
88.2
88.0
-25
White LED Boost Converter
In Tiny Package
Oscillator Frequency vs. Temperature
1.50
1.45
1.40
1.35
1.30
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
-25
0
25
50
75
o
100
125
0
25
50
Temperature ( C)
75
o
100
125
Oscillator Frequency (MHz)
Max Duty Cycle (%)
Temperature ( C)
Switch RDSON
1.80
1.60
Efficiency vs. Load Current
Dirving 3 LEDs
100
90
1.40
1.20
1.00
0.80
0.60
0.40
0.20
2.7
T
A
= 25
o
C
T
A
= 85
o
C
Efficiency (%)
RDSON
(Ω)
80
70
60
3.1
3.5
3.9
4.3
4.7
5.1
5.5
50
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
V
IN
(V)
V
IN
(V)
Efficiency vs. Load Current
Dirving 4 LEDs
100
100
Efficiency vs. Load Current
Dirving 6 LEDs
90
90
Efficiency (%)
80
Efficiency (%)
3.1
3.5
3.9
4.3
4.7
5.1
5.5
80
70
70
60
60
50
2.7
50
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
V
IN
(V)
V
IN
(V)
Rev. A.01
11
AME [ ANALOG MICROELECTRONICS ]
