AL8807
Typical Performance Characteristics (cont.) (1.3A LED Current MSOP-8EP)
10
8
250
L = 100μH
R S = 77m ?
6
4
2
0
200
150
T A = 25°C
V CTRL = Open
-2
-4
-6
100
50
1 LED
2 LEDs 3 LEDs 5 LEDs 6 LEDs7 LEDs 8 LEDs
-8
-10
6
9
12 15 18 21 24 27 30 33 36
0
6 9 12 15 18 21 24 27 30 33 36
4 LEDs
INPUT VOLTAGE (V)
Figure 25. LED Current Deviation vs. Input Voltage
10
8
INPUT VOLTAGE (V)
Figure 26. Switching Frequency vs. Input Voltage
300
L = 68μH
R S = 77m ?
6
4
2
0
-2
-4
-6
250
200
150
100
50
T A = 25°C
V CTRL = Open
1 LED
2 LEDs 3 LEDs 4 LEDs
0
-8
-10
6
9
12 15 18 21 24 27 30 33 36
6 9 12 15 18 21 24 27 30 33 36
5 LEDs
6 LEDs 7 LEDs 8 LEDs
INPUT VOLTAGE (V)
Figure 27. LED Current Deviation vs. Input Voltage
10
8
INPUT VOLTAGE (V)
Figure 28. Switching Frequency vs. Input Voltage
600
L = 33μH
R S = 77m ?
6
4
2
0
-2
-4
-6
500
400
300
200
100
T A = 25°C
V CTRL = Open
1 LED
7 LEDs
6 LEDs
-8
-10
6
9
12 15 18 21 24 27 30 33 36
0
4 LEDs 8 LEDs
2 LEDs 3 LEDs
6 9 12 15 18 21 24 27 30 33 36
5 LEDs
INPUT VOLTAGE (V)
Figure 29. LED Current Deviation vs. Input Voltage
INPUT VOLTAGE (V)
Figure 30. Switching Frequency vs. Input Voltage
AL8807
Document number: DS35281 Rev. 5 - 2
8 of 20
www.diodes.com
March 2013
? Diodes Incorporated
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