al8807 Diodes, Inc., al8807 Datasheet - Page 6

• 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
100%
95%
90%
85%
80%
75%
1.10
1.05
1.00
0.95
0.90
700
600
500
400
300
200
100
0
6
6
6
1 LED
2 LEDs 3 LEDs 4 LEDs 5 LEDs 6 LEDs 7 LEDs 8 LEDs
1 LED
L=68µH
R =300m
T =25°C
1 LED
L=68µH
R =150m
T =25°C
L=68µH
R =100m
T =25°C
2 LEDs
A
Fig. 15 Switching Frequency vs. Input Voltage
S
2 LEDs 3 LEDs 4 LEDs
A
A
S
S
Fig. 17 1A LED Current vs. Input Voltage
9
9
9
3 LEDs
Fig. 13 Efficiency vs. Input Voltage
Ω
Ω
Ω
12
12
12
4 LEDs
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
15
15
15
5 LEDs
5 LEDs 6 LEDs 7 LEDs 8 LEDs
18
18
18
6 LEDs 7 LEDs
21
21
21
24
24
24
HIGH EFFICIENCY LOW EMI 30V 1A BUCK LED DRIVER
8 LEDs
27
27
27
(cont.) (T
30
30
www.diodes.com
30
6 of 20
A
= 25°C unless otherwise stated)
0.37
0.36
0.35
0.34
0.33
0.32
0.30
0.31
0.74
0.72
0.70
0.68
0.66
0.64
0.62
0.60
6
6
1 LED
2 LEDs
2 LEDs
L=68µH
R =300m
T =25°C
1 LED
L=68µH
R =150m
T =25°C
A
S
Fig. 14 330mA LED Current vs. Input Voltage
A
S
Fig. 16 670mA LED Current vs. Input Voltage
9
9
3 LEDs
3 LEDs
Ω
Ω
12
12
4 LEDs
4 LEDs
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
15
15
5 LEDs
5 LEDs
18
18
6 LEDs
6 LEDs
21
21
7 LEDs
7 LEDs
24
24
AL8807
8 LEDs
© Diodes Incorporated
November 2011
8 LEDs
27
27
30
30