aoz1081 Alpha & Omega Semiconductor, aoz1081 Datasheet - Page 6

• Manufacturer Part Number: aoz1081
• Description: Ezbucktm 1.8a High Efficiency Constant Current Regulator For Leds
• Manufacturer: Alpha & Omega Semiconductor

Typical Performance Characteristics
Circuit of Figure 1. T
Rev. 1.1 April 2009
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
1.05
1.04
1.03
1.02
1.01
1.00
0.99
0.98
0.97
0.96
0.95
4
4
Normalized Feedback Voltage Variation vs. V
Normalized Switching Frequency vs. V
6
6
A
= 25°C, V
8
8
IN
V
V
IN
IN
10
10
= V
(V)
(V)
EN
= 12V, V
12
12
OUT
14
14
IN
= 3.3V unless otherwise specified.
IN
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16
16
100
0.7
0.6
0.5
0.4
0.3
0.2
0.1
95
90
85
80
75
0
0
0
0.2
10
0.4
Digital Dimming vs. LED Current
20
Efficiency (V
200Hz PWM Signal on EN Pin
0.6
30
PWM Duty Cycle (%)
V
V
Load Current (A)
OUT
OUT
0.8
40
IN
= 7.2V
= 3.6V
) vs. Load Current
1.0
50
1.2
60
1.4
70
AOZ1081
1.6
80
Page 6 of 16
1.8
90
100
2.0