AT1313
High Efficiency, Constant Current
White-LED Driver
Typical Characteristics
Efficiency vs. Vin (4 LED)
L:SR0302 D:RB501-40
Efficiency vs. Vin (3 LED)
L:SR0302 D:RB501-40
94
94
92
90
92
90
88
E
fficien (%
cy )
E
fficien (%
cy )
86
84
82
80
78
76
2
3
4
Vin (V)
88
86
84
Io=100mA, L=22uH
Io=100mA, L=10uH
Io=100mA,L=6.8uH
Io=100mA, L=22uH
82
Io=100mA, L=10uH
Io=100mA,L=6.8uH
5
6
80
2
3
4
Vin (V)
5
6
Conversion Efficiency
L:SR0302 D:RB501-40
100
95
90
85
80
4LEDs, L=22uH,Vin=3V
CH1:LX CH3:V
OUT
Ripple CH4:I
LX
Efficiency (%)
75
3LEDs,L=22uH,Vin=3V
70
50
60
70
80
90
100
LED CURRENT(mA)
CH1:EN
CH3:FB
Switching Transient Waveform
CH1:EN CH3:FB CH4:I
IN
PWM Dimming Control Using the EN Pin
Start-Up Waveform
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW:
http://www.aimtron.com.tw
10/31/2006 REV:2.0
Email:service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
