Diodes AL8805 - Manual (Page 8)

AL8805
Document number: DS35030 Rev. 4 - 2
8 of 16
www.diodes.com
July 2012
© Diodes Incorporated
AL8805
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 = 25 C µ
°
S
A
Ω
%
E
RROR
-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
WI
T
C
H
IN
G
F
R
E
Q
U
E
N
C
Y
(k
H
z)
9 12 15 18 21 24 27 30 33 36 6
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 = 25 C 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 = 25 C
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
WI
T
C
HI
N
G
F
R
E
Q
UE
N
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 = 25 C
µ
°
S
A
Ω
% E
R
R
O
R
-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
WI
T
C
H
IN
G
F
R
E
Q
U
E
N
C
Y
(k
H
z)
6 9 12 15 18 21 24 27 30 33 36