al8807 Diodes, Inc., al8807 Datasheet - Page 7

• 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%
-2%
-4%
-6%
-8%
-10%
-10%
8%
6%
4%
2%
0%
10%
10%
-2%
-4%
-6%
-8%
-2%
-4%
-6%
-8%
0%
8%
6%
4%
2%
0%
8%
6%
4%
2%
6
6
2 LEDs
1 LED
6
1 LED
Fig. 20 LED Current Deviation vs. Input Voltage
2 LEDs
1 LED
2 LEDs 3 LEDs 4 LEDs
L=68µH
R =150m
T =25°C
Fig. 18 LED Current Deviation vs. Input Voltage
L=100µH
R =150m
T =25°C
Fig. 22 LED Current Deviation vs. Input Voltage
L=33µH
R =150m
T =25°C
A
S
A
S
A
S
9
9
3 LEDs
9
3 LEDs
Ω
Ω
Ω
12
12
12
4 LEDs
4 LEDs
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
15
15
15
5 LEDs
5 LEDs
5 LEDs 6 LEDs
18
18
18
6 LEDs
6 LEDs
21
21
21
7 LEDs
7 LEDs
7 LEDs
24
24
24
8 LEDs
8 LEDs
HIGH EFFICIENCY LOW EMI 30V 1A BUCK LED DRIVER
8 LEDs
27
27
27
(670mA LED current) (T
30
www.diodes.com
30
30
7 of 20
400
350
300
250
200
150
100
250
200
150
100
800
700
600
500
400
300
200
100
50
50
0
0
0
6
6
6
1 LED
2 LEDs 3 LEDs 4 LEDs
1 LED
1 LED
2 LEDs 3 LEDs
L=68µH
R =150m
T =25°C
Fig. 21 Switching Frequency vs. Input Voltage
L=100µH
R =150m
T =25°C
2 LEDs 3 LEDs 4 LEDs
L=33µH
R =150m
T =25°C
A
Fig. 19 Switching Frequency vs. Input Voltage
S
Fig. 23 Switching Frequency vs. Input Voltage
A
S
A
S
9
A
9
9
= 25°C unless otherwise stated)
Ω
Ω
Ω
12
12
12
4 LEDs
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
15
15
15
5 LEDs 6 LEDs 7 LEDs 8 LEDs
5 LEDs 6 LEDs 7 LEDs 8 LEDs
5 LEDs 6 LEDs 7 LEDs
18
18
18
21
21
21
24
24
24
AL8807
© Diodes Incorporated
November 2011
8 LEDs
27
27
27
30
30
30