ame5142 AME, Inc., ame5142 Datasheet - Page 13

• Manufacturer Part Number: ame5142
• Description: White Led Boost Converter In Tiny Package
• Manufacturer: AME, Inc.

n Application Hints
Rev. A.04
AME5142
Figure 8: Six White LEDs Application in Li-Ion Battery
Figure 9: Eight White LEDs Application in Li-Ion Battery
4.7 F
V
4.7 F
4.7 F
C
Figure 10: Six White LEDs Application in Li-Ion Battery
V
IN
V
C
C
IN
IN
IN
IN
IN
3.3V to 5.5V
2.7V to 5.5V
2.7V to 5.5V
AME, Inc.
IN
EN
GND
IN
EN
GND
IN
EN
GND
AME5142
AME5142
AME5142
10 H
10 H
L1
10 H
L1
L1
OVP
SW
FB
OVP
OVP
SW
SW
FB
FB
7.5
R2
7.5
R2
7.5
R2
V
7.5
V
R2
OUT
OUT
V
C
C
1 F
OUT
1 F
OUT
OUT
C
1 F
OUT
100
95
90
85
80
White LED Boost Converter
90
85
80
75
70
65
60
55
50
90
85
80
75
70
65
60
55
50
3
0
0
V
IN
= 3.6V
3.5
V
Efficiency Vs I
Efficiency Vs I
Efficiency Vs V
5
5
IN
= 3.6V
4
I
I
OUT
OUT
V
In Tiny Package
IN
10
(mA)
10
(mA)
(v)
V
4.5
V
IN
V
IN
OUT
V
OUT
IN
= 2.7V
IN
IN
= 4.2V
V
= 4.2V
= 2.7V
IN
= 3.3V
V
I
15
LED
V
I
15
OUT
LED
V
OUT
I
V
OUT
OUT
= 20mA
5
IN
=18.6V
= 20mA
=24.6V
= 3.3V
= 40mA
= 9.3V
5.5
20
20
13