AT1312A/B/C
Preliminary Product Information
High Efficiency, Constant Current
White-LEDs Driver
Typical Characteristics
Conversion Efficiency
L:SR0302 D:RB501-40
90
90
88
85
86
84
Efficiency (%)
Efficiency (%)
Efficiency vs. Vin (3 LED)
L:SR0302 D:RB501-40
80
75
6 L E D s, L = 2 2 u H , V in = 3 V
82
80
78
76
74
72
70
2
3
4
Vin (V)
Io=20 m A, L =22u H
Io=20 m A, L =10u H
Io = 2 0 m A,L = 6.8 u H
Io = 2 0 m A,L = 4.7 u H
70
4 L E D s, L = 2 2 u H , V in = 3 V
3 L E D s, L = 2 2 u H , V in = 3 V
65
0
5
10
LED CURRENT(mA)
15
20
5
6
Efficiency vs. Vin (4 LED)
L:SR0302 D:RB501-40
90
88
86
84
82
80
78
76
74
72
70
2
3
4
Vin (V)
Efficiency vs. Vin (6 LED)
L:SR0302 D:RB501-40
90
88
86
84
82
80
78
76
74
72
70
2
3
4
Vin (V)
Io=20mA,
Io=20mA,
L=22uH
L=10uH
Efficiency (%)
Efficiency (%)
Io=20mA, L=22uH
Io=20mA, L=10uH
Io=20mA,L=6.8uH
Io=20mA,L=4.7uH
Io=20mA, L=6.8uH
Io=20mA,L=4.7u
H 5
6
5
6
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Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
2/23/2006 REV:1.1
Email:
service@aimtron.com.tw
5
AIMTRON [ AIMTRON TECHNOLOGY ]
