al8805 Diodes, Inc., al8805 Datasheet - Page 10

• Manufacturer Part Number: al8805
• Description: High Efficiency 30v 1a Buck Led Driver
• Manufacturer: Diodes, Inc.

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