参数资料
型号: MIC3291-18YML TR
厂商: Micrel Inc
文件页数: 5/17页
文件大小: 0K
描述: IC PWM WLED DVR 1.8V 1.2MHZ 8MLF
标准包装: 1
恒定电流:
拓扑: PWM,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 1MHz ~ 1.35MHz
电源电压: 2.5 V ~ 6.5 V
输出电压: 可调
安装类型: 表面贴装
封装/外壳: 8-VFDFN 裸露焊盘,8-MLF?
供应商设备封装: 8-MLF?(2x2)
包装: 标准包装
其它名称: 576-3860-6
Micrel, Inc.
Typical Characteristics
MIC3291
Feedback Voltage
6 Series White LED
3 Series White LED
275
250
vs. Brightness Level
100
90
Efficiency
V IN = 2.8V
100
90
Efficiency
V IN = 2.8V
225
200
175
150
125
100
80
70
60
50
40
V IN = 3.6V
V IN = 4.2V
80
70
60
50
40
V IN = 3.6V
V IN = 4.2V
75
30
30
50
25
0
20
10
0
L = 10μH
C OUT = 0.27μF
20
10
0
L = 10μH
C OUT = 0.27μF
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0
5
10
15
20
25
0
5
10
15
20
25
BRIGHTNESS LEVEL (0-15)
6 Series White LED
WHITE LED CURRENT (mA)
3 Series White LED
WHITE LED CURRENT (mA)
Feedback Voltage
100
90
Efficiency
V IN = 4.2V
100
90
Efficiency
260
258
vs. Input Voltage
80
70
80
70
256
254
60
50
V IN = 3.6V
60
50
V IN = 3.6V
252
250
40
V IN = 2.8V
40
V IN = 4.2V
V IN = 2.8V
248
30
30
246
20
10
0
L = 22μH
C OUT = 0.27μF
20
10
0
L = 22μH
C OUT = 0.27μF
244
242
240
0
5
10
15
20
25
0
5
10
15
20
25
2.5
3
3.5
4
4.5
5
5.5
6
WHITE LED CURRENT (mA)
Peak Switch Current
WHITE LED CURRENT (mA)
Input Current
INPUT VOLTAGE (V)
Current Limit
1000
900
800
700
vs. Input Voltage
350
300
250
200
vs. Input Voltage
6 LEDs
L=10μH
1
0.95
0.9
0.85
vs. Input Voltage
600
0.8
500
400
150
100
0.75
0.7
300
200
50
0
3 LEDs
0.65
0.6
2.5
3
3.5
4
4.5
5
5.5
2.5
3
3.5
4
4.5
5
5.5
6
2.6 3.1 3.6 4.1 4.6 5.1 5.6 6.1 6.6
INPUT VOLTAGE (V)
September 2010
INPUT VOLTAGE (V)
5
INPUT VOLTAGE (V)
M9999-092810
(408) 944-0800
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