Data Sheet

AL8805
Document number: DS35030 Rev. 4 - 2
8 of 16
www.diodes.com
July 2012
© Diodes Incorporated
A
L8805
Typical Performance Characteristics (cont.) (1A LED Current) (@T
A
= +25°C, unless otherwise specified.)
2 LEDs
3 LEDs
5 LEDs
6 LEDs
7 LEDs
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
10%
INPUT VOLTAGE (V)
Figure 24 LED Current Deviation vs. Input Voltage
L = 100 H
R = 100m
T = 25C
µ
°
S
A
Ω
% ERROR
-10%
6 9 12 15 18 21 24 27 30 33 36
1 LED
4 LEDs
8 LEDs
0
50
100
150
200
250
INPUT VOLTAGE (V)
Figure 25 Switching Frequency vs. Input Voltage
S
WIT
C
H
I
N
G
F
R
E
Q
U
E
N
C
Y
(k
H
z)
9 1215182124273033366
2 LEDs
3 LEDs
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
10%
INPUT VOLTAGE (V)
Figure 26 LED Current Deviation vs. Input Voltage
L =68 H
R = 100m
T = 25C
µ
°
S
A
Ω
% ERROR
6 9 12 15 18 21 24 27 30 33 36
8 LEDs
1 LED
4 LEDs
5 LEDs
6 LEDs
7 LEDs
1 LED
2 LEDs
3 LEDs
4 LEDs
6 LEDs
7 LEDs
8 LEDs
0
50
100
150
200
250
300
350
L = 68 H
R = 100m
T = 25C
µ
°
S
A
Ω
INPUT VOLTAGE (V)
Figure 27 Switching Frequency vs. Input Voltage
6 9 12 15 18 21 24 27 30 33 36
5 LEDs
S
WIT
C
HIN
G
F
R
E
Q
UEN
C
Y
(
k
Hz)
1 LED
2 LEDs
3 LEDs
5 LEDs
6 LEDs
8 LEDs
-8%
-6%
-4%
-2%
0%
2%
4%
6%
8%
10%
INPUT VOLTAGE (V)
Figure 28 LED Current Deviation vs. Input Voltage
L = 33 H
R = 100m
T = 25C
µ
°
S
A
Ω
% ERROR
-10%
6 9 12 15 18 21 24 27 30 33 36
4 LEDs
0
100
200
300
400
500
600
INPUT VOLTAGE (V)
Figure 29 Switching Frequency vs. Input Voltage
700
S
WIT
C
H
I
N
G
F
R
E
Q
U
E
N
C
Y
(k
H
z)
6 9 12 15 18 21 24 27 30 33 36