参数资料
型号: AL8805W5-7
厂商: Diodes Inc
文件页数: 5/16页
文件大小: 0K
描述: IC REG SW CONV BUCK ASYNC SOT-23
标准包装: 1
恒定电流:
拓扑: PWM,降压(降压)
输出数: 1
内部驱动器:
类型 - 主要: 通用
频率: 1MHz
电源电压: 6 V ~ 30 V
安装类型: 表面贴装
封装/外壳: SC-74A,SOT-753
供应商设备封装: SOT-25
包装: 标准包装
其它名称: AL8805W5-7DIDKR
AL8805
Typical Performance Characteristics (cont.) (@T A = +25°C, unless otherwise specified.)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
300
240
180
120
V CTRL = Open
1.0
0.5
0.2
0.1
60
V SET = V IN
T A = 25 ° C
0.0
0%
400
350
300
250
20% 40% 60% 80% 100%
PWM DUTY CYCLE
Figure 7 I LED vs. PWM Duty Cycle
0
130
125
120
115
110
105
0
6
12 18 24 30 36
V IN (V)
Figure 8 SW R DS(ON) vs. Input Voltage
R SET = 150m Ω
L = 68μH
V IN = 12V
1 LED Load
V SENSE
V SW
18
16
14
12
10
8
100
6
200
150
95
90
85
4
2
0
100
-40
-15 10 35 60 85 110
AMBIENT TEMPERATURE (°C)
Figure 9 SW R DS(ON) vs. Temperature
80
-2
TIME (μs)
Figure 10 SW Output Switching Characteristics
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
R SET = 150m Ω , L =68μH, V IN = 12V, 1LED Load, T A =25 ° C
Duty Cycle = 5%
I LED
V SW
V CTRL
20
18
16
14
12
10
8
6
4
2
L = 33μH
R S = 150m Ω
T A = 25°C
2 LED
0
0
50
100 150
Time (μs)
0
200
6
9
12 15 18 21 24 27 30 33 36
INPUT VOLTAGE (V)
Figure 11 PWM Dimming
Figure 12 Duty Cycle vs. Input Voltage
AL8805
Document number: DS35030 Rev. 4 - 2
5 of 16
www.diodes.com
July 2012
? Diodes Incorporated
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