参数资料
型号: MIC2297-42YML TR
厂商: Micrel Inc
文件页数: 5/11页
文件大小: 0K
描述: IC LED DRIVR WHITE BCKLGT 10-MLF
标准包装: 1
拓扑: PWM,升压(升压)
输出数: 1
内部驱动器:
类型 - 主要: 背光,闪灯/白光
类型 - 次要: 白色 LED
频率: 525kHz ~ 675kHz
电源电压: 2.5 V ~ 10 V
输出电压: 40V
安装类型: 表面贴装
封装/外壳: 10-VFDFN 裸露焊盘,10-MLF?
供应商设备封装: 10-MLF?(3x3)
包装: 标准包装
工作温度: -40°C ~ 125°C
产品目录页面: 1082 (CN2011-ZH PDF)
其它名称: 576-1440-6
Micrel
Typical Characteristics (continued)
MIC2297
Efficiency for 10 LEDs
Efficiency for 9 LEDs
Efficiency for 9 LEDs
85
80
75
70
65
vs. LED Current
V IN = 4.2V
V IN = 3.2V V IN = 3.6V
80
75
70
65
vs. LED Current
V IN = 4.2V
V IN = 3.6V
V IN = 3.2V
85
80
75
70
65
vs. LED Current
V IN = 4.2V
V IN = 3.2V
V IN = 3.6V
60
55
60
55
60
55
0
0
0
50
45
40
35
L = 15μH
10 20 30
LED CURRENT (mA)
40
50
45
40
5
L = 6.8μH
10 15 20 25 30 35
LED CURRENT (mA)
50
45
40
35
5
L = 15μH
10 15 20 25 30 35 40
LED CURRENT (mA)
35
LED Current
vs. Duty Cycle
L1 = Murata LQH32CN100K11
L1
30
25
5V
4V
3V
2V
C1
1μF, 16V
VIN
SW
C2
0.47μF, 50V
COMP
20
15
10
2V peak PWM
C3
0.22μF, 10V
PWM
REF
BRT
MIC2297BML
EN OVP
AGND PGND FB
C4
0.1μF, 10V
0
5
0
20
PWM = 20kHz
R SENSE
40 60 80 100
DUTY CYCLE (%)
Mach 2008
5
M9999-032708
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