Diodes AL8807Q - Manual (Page 6)

AL8807Q
Document number: DS36904 Rev. 1 - 2
6 of 16
www.diodes.com
March 2014
© Diodes Incorporated
AL8807Q
Typical Performance Characteristics 670mA LED Current (cont.) (@T
A
= +25°C, unless otherwise specified.)
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 13. LED Current Deviation vs. Input Voltage
10
8
2
0
-8
-10
LE
D
C
U
R
R
EN
T
E
R
R
O
R
(%
)
4
-4
-6
-2
6
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 14. Switching Frequency vs. Input Voltage
350
300
200
50
0
SW
IT
C
H
IN
G
F
R
E
Q
U
E
N
C
Y
(k
H
z)
250
100
150
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 15. LED Current Deviation vs. Input Voltage
10
8
2
0
-8
-10
LE
D
C
U
R
R
EN
T
E
R
R
O
R
(%
)
4
-4
-6
-2
6
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 16. Switching Frequency vs. Input Voltage
500
450
300
250
50
0
SW
IT
C
H
IN
G
F
R
E
Q
U
EN
C
Y
(k
H
z)
350
150
100
200
400
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 17. LED Current Deviation vs. Input Voltage
10
8
4
2
0
-4
-8
-10
LE
D
C
U
R
R
E
N
T
E
R
R
O
R
(%)
1 LED
2 LEDs
3 LEDs
4 LEDs
5 LEDs
6 LEDs
7 LEDs
8 LEDs
L = 33µH
R = 150m
T = 25°C
V
= Open
S
A
CTRL

6
-2
-6
6 9 12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 18. Switching Frequency vs. Input Voltage
800
700
500
400
100
0
SW
IT
C
H
IN
G
F
R
E
Q
U
EN
C
Y
(k
H
z)
1 LED
2 LEDs
3 LEDs
4 LEDs
5 LEDs
6 LEDs
7 LEDs 8 LEDs
L = 33µH
R = 150m
T = 25°C
V
= Open
S
A
CTRL

600
300
200