Diodes AL8807A - Manual (Page 6)

AL8807A
Document number: DS35990 Rev. 2 - 2
6 of 20
www.diodes.com
March 2013
© Diodes Incorporated
AL8807A
Typical Performance Characteristics
(cont.) (@T
A
= +25°C, unless otherwise specified.)
Figure 7 SW Output Rise Time Figure 8 SW Output Fall Time
Figure 12 Switching Frequency vs. V
CTRL
-0.10
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
-2%
0%
2%
4%
6%
8%
10%
12%
14%
16%
18%
20%
22%
0 1 2 3 4 5
CTRL VOLTAGE (V)
Figure 9 LED Current (Different Sense Resistor) vs. V
CTRL
LE
D
C
U
R
R
E
N
T
E
R
R
O
R
(%
)
L
E
D CU
RRENT
(
A
)
V = 12V
2 LEDs
L = 68µH
T = 25°C
IN
A
R = 100m
S

R = 150m
S

LED Current
R = 150m
S

R = 100m
S

LED Current Error
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0 1 2 3 4 5
CTRL VOLTAGE (V)
Figure 10 LED Current (Different Inductor) vs. V
CTRL
LE
D
C
U
R
R
EN
T
(A
)
L = 33µH
L = 68 ~ 220µH
V = 12V
2 LEDs
R = 100m
T = 25°C
IN
S
A

0.00
0 0.1 0.2 0.3 0.4 0.5
CTRL PIN VOLTAGE (V)
Figure 11 LED Current (Zoomed In) vs. V
CTRL
V = 12V
2 LEDs
R = 100m
T = 25°C
IN
S
A

L = 33µH
L = 68 ~ 220µH
LE
D
C
U
R
R
E
N
T
(A
)
0.05
0.10
0.15
0.20
0.25