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AL8805 Datasheet(PDF) 8 Page - Diodes Incorporated

Part # AL8805
Description  HIGH EFFICIENCY 30V 1A BUCK LED DRIVER
PDF  16 Pages
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Manufacturer  DIODES [Diodes Incorporated]
Direct Link  http://www.diodes.com
Logo DIODES - Diodes Incorporated

AL8805 Datasheet(HTML) 8 Page - Diodes Incorporated

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AL8805
HIGH EFFICIENCY 30V 1A BUCK LED DRIVER
AL8805
Document number: DS35030 Rev. 1 - 2
8 of 16
www.diodes.com
September 2010
© Diodes Incorporated
Typical Performance Characteristics (1A LED current) (TA = 25°C unless otherwise stated)
1 LED
2 LEDs
3 LEDs
4 LEDs 5 LEDs
6 LEDs
7 LEDs
8 LEDs
-10%
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
10%
6
9
12
15
18
21
24
27
30
Input voltage (V)
L = 100µH
RS = 100mΩ
TA = 25°C
Figure 24: LED current deviation vs Input voltage
1 LED
2 LEDs
3 LEDs
4 LEDs
5 LEDs 6 LEDs
7 LEDs
8 LEDs
0
50
100
150
200
250
6
9
12
15
18
21
24
27
30
Input voltage (V)
L = 100µH
RS = 100mΩ
TA = 25°C
Figure 25: Switching frequency vs Input voltage
1 LED
2 LEDs
3 LEDs 4 LEDs 5 LEDs
6 LEDs 7 LEDs 8 LEDs
-10%
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
10%
6
9
12
15
18
21
24
27
30
Input voltage (V)
L = 68µH
RS = 100mΩ
TA = 25°C
Figure 26: LED current deviation vs Input voltage
1 LED
2 LEDs
3 LEDs
4 LEDs 5 LEDs
6 LEDs 7 LEDs
8 LEDs
0
50
100
150
200
250
300
350
6
9
12
15
18
21
24
27
30
Input voltage (V)
L = 68µH
RS = 100mΩ
TA = 25°C
Figure 27: Switching frequency vs Input voltage
1 LED
2 LEDs
3 LEDs
4 LEDs
5 LEDs
6 LEDs
7 LEDs 8 LEDs
-10%
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
10%
6
9
12
15
18
21
24
27
30
Input voltage (V)
L = 33µH
RS = 100mΩ
TA = 25°C
Figure 28: LED current deviation vs Input voltage
1 LED
2 LEDs
3 LEDs 4 LEDs
5 LEDs
6 LEDs
7 LEDs
8 LEDs
0
100
200
300
400
500
600
6
9
12
15
18
21
24
27
30
Input voltage (V)
L = 33µH
RS = 100mΩ
TA = 25°C
Figure 29: Switching frequency vs Input voltage



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