参数资料
型号: MIC2298-15YML TR
厂商: Micrel Inc
文件页数: 9/13页
文件大小: 0K
描述: IC LED DRIVER HIGH BRIGHT 12-MLF
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: 闪灯/白光
类型 - 次要: 高亮度 LED(HBLED),白色 LED
频率: 800kHz ~ 1.2MHz
电源电压: 2.5 V ~ 10 V
输出电压: 30V
安装类型: 表面贴装
封装/外壳: 12-VFDFN 裸露焊盘,12-MLF?
供应商设备封装: 12-MLF?(4x4)
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: 576-1657-6
Micrel, Inc.
Figure 7. LED Current vs. DC (on BRT pin)
Should the SS/DIM pin be used for voltage programming
the LED current, note that there will be a small offset due
mismatches between the 30k FB input and the
impedance driving the SS/DIM pin.
Soft Start Functionality
The soft start time is dependant up on both C SS and the
comp capacitor values. C COMP is fixed for stable
operation (typically 33nF); therefore, if any increases in
soft start are desired, this should be done using the C SS
capacitor. The approximate total startup time is given by
the larger of: -
T SS = 1 ms + 175 k ? C SS
Or
T SS = 1 ms + C COMP / 44 ? 10 ? 6
E.g. for C COMP = 33nF, use values of C COMP > 4.3nF to
increase startup time from 1.75ms. The soft start
capacitor should be connected from the SS/DIM pin to
ground.
MIC2298
October 2007
9
M9999-101707-B
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