al8807 Diodes, Inc., al8807 Datasheet - Page 8

• Manufacturer Part Number: al8807
• Description: High Efficiency Low Emi 30v 1a Buck Led Driver
• Manufacturer: Diodes, Inc.

Typical Performance Characteristics
AL8807
Document Number: DS35281 Rev. 3 - 2
-10%
-10%
10%
-10%
10%
-2%
-4%
-6%
-8%
-2%
-4%
-6%
-8%
10%
-2%
-4%
-6%
-8%
8%
6%
4%
2%
0%
8%
6%
4%
2%
0%
8%
6%
4%
2%
0%
6
6
6
1 LED
1 LED
1 LED
Fig. 28 LED Current Deviation vs. Input Voltage
L=33µH
R =100m
T =25°C
2 LEDs 3 LEDs 4 LEDs
Fig. 24 LED Current Deviation vs. Input Voltage
L=100µH
R =100m
T =25°C
L=68µH
R =100m
T =25°C
Fig. 26 LED Current Deviation vs. Input Voltage
2 LEDs 3 LEDs 4 LEDs
A
S
A
2 LEDs 3 LEDs
S
A
S
9
9
9
Ω
Ω
Ω
12
12
12
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
4 LEDs
15
15
15
5 LEDs 6 LEDs 7 LEDs 8 LEDs
5 LEDs 6 LEDs 7 LEDs 8 LEDs
5 LEDs 6 LEDs
18
18
18
21
21
21
7 LEDs 8 LEDs
24
24
24
HIGH EFFICIENCY LOW EMI 30V 1A BUCK LED DRIVER
27
27
27
(1A LED current) (T
www.diodes.com
30
30
30
8 of 20
180
160
140
120
100
300
250
200
150
100
600
500
400
300
200
100
80
60
40
20
0
50
0
0
6
6
A
1 LED
6
1 LED
1 LED
L=100µH
R =100m
T =25°C
Fig. 25 Switching Frequency vs. Input Voltage
= 25°C unless otherwise stated)
L=68µH
R =100m
T =25°C
L=33µH
R =100m
T =25°C
A
2 LEDs 3 LEDs 4 LEDs
2 LEDs 3 LEDs 4 LEDs
S
Fig. 27 Switching Frequency vs. Input Voltage
Fig. 29 Switching Frequency vs. Input Voltage
2 LEDs 3 LEDs 4 LEDs
A
A
S
S
9
9
9
Ω
Ω
Ω
12
12
12
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
15
15
15
5 LEDs 6 LEDs 7 LEDs 8 LEDs
5 LEDs 6 LEDs
5 LEDs 6 LEDs 7 LEDs 8 LEDs
18
18
18
21
21
21
7 LEDs
24
24
24
AL8807
© Diodes Incorporated
November 2011
8 LEDs
27
27
27
30
30
30