AL8805 Datasheet, PDF (10/16 Pages) Diodes Incorporated – HIGH EFFICIENCY 30V 1A BUCK LED DRIVER

AL8805
HIGH EFFICIENCY 30V 1A BUCK LED DRIVER
Applications Information (cont.)
PWM Dimming (cont.)
Typically, for a PWM frequency of 500Hz the accuracy is
better than 1% for PWM ranging from 1% to 100%.
700
600
500
400
300
200
100
0
0%
10%
20%
30%
40% 50% 60%
PWM dimming [%]
70%
Figure 30. PWM Dimming at 500Hz
80%
90% 100%
70
60
50
40
30
20
10
0
0%
1%
2%
3%
4%
5%
6%
7%
8%
9% 10%
PWM dimming [%]
Figure 31. Low duty cycle PWM Dimming at 500Hz
AL8805
Document number: DS35030 Rev. 1 - 2
10 of 16
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September 2010
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