AL8807Q Datasheet, PDF (6/16 Pages) Diodes Incorporated – HIGH EFFICIENCY LOW 30V 1.3A AUTOMOTIVE GRADE BUCK LED DRIVER

AL8807Q
Typical Performance Characteristics 670mA LED Current (cont.) (@T_A = +25°C, unless otherwise specified.)
10
350
8
300
6
4
250
2
200
0
-2
150
-4
100
-6
-8
50
-106 _{9 12 15 18 21 24 27 30 33 36}
INPUT VOLTAGE (V)
Figure 13. LED Current Deviation vs. Input Voltage
0
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 14. Switching Frequency vs. Input Voltage
10
8
6
4
2
0
-2
-4
-6
-8
-106 _{9 12 15 18 21 24 27 30 33 36}
INPUT VOLTAGE (V)
Figure 15. LED Current Deviation vs. Input Voltage
500
450
400
350
300
250
200
150
100
50
0
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 16. Switching Frequency vs. Input Voltage
10
L = 33µH
8 R_S = 150m
T_A = 25°C
6 V_CTRL = Open
4
2 LEDs
2
1 LED
0
-2
3 LEDs
4 LEDs
-4
5 LEDs
6 LEDs
7 LEDs
-6
8 LEDs
-8
-10 _{6 9 12 15 18 21 24 27 30 33 36}
INPUT VOLTAGE (V)
Figure 17. LED Current Deviation vs. Input Voltage
800
700
600
L = 33µH
R_S = 150m
T_A = 25°C
V_CTRL = Open
500
400
300
1 LED
200
7 LEDs ^{8 LEDs}
100
3 LEDs
5 LEDs
6 LEDs
2 LEDs ^{4 LEDs}
0
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 18. Switching Frequency vs. Input Voltage
AL8807Q
Document number: DS36904 Rev. 1 - 2
6 of 16
www.diodes.com
March 2014
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