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| 型号： | MIC3289-24YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER WHITE BCKLGT 8-MLF |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz ~ 1.35MHz |
| 电源电压： | 2.5 V ~ 6.5 V |
| 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 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1082 (CN2011-ZH PDF) |
| 其它名称： | 576-2713-6 |
MIC3289
1.2MHz PWM White LED Driver with
Internal Schottky Diode and True 1-Wire
Digital Control
? 2mm × 2mm leadless MLF -8L package option
? –40 C to +125 C junction temperature range
General Description
The MIC3289 is a PWM boost-switching regulator that is
optimized for constant-current white LED driver
applications. The MIC3289 features an internal Schottky
diode, allowing an efficient DC/DC solution that requires
only 4 external components.
The MIC3289 allows for a single wire simple digital
interface to control the dimming over 16 steps with a log
scale to give better resolution at the lower currents and to
better match the sensitivity of the human eye. The pre-
programming feature allows the user to select any one of
the 16 WLED current levels as the start-up brightness
level.
The feedback voltage of the MIC3289 is only 250mV,
allowing high efficiency while retaining excellent accuracy
for the white LED current.
The MIC3289 implements a constant frequency 1.2MHz
PWM control scheme. The high frequency PWM operation
saves board space by reducing external component sizes.
The 1.2MHz PWM scheme also reduces switching noise
and ripple to the input power source.
The 2.5V to 6.5V input voltage range of MIC3289 allows
direct operation from single cell Li Ion as well as 3- to 4-
cell NiCad/NiMH/Alkaline batteries. Battery life is
Features
? Single wire combines 16 level logarithmic brightness &
shutdown control
? 16V / 24V OVP options supports up to 4 & 6 WLEDs
? Start-up in any one of 16 brightness levels
? Internal Schottky diode
? 2.5V to 6.5V input voltage
? 1.2 MHz PWM operation
? Over 500mA switch current
? 250mV reference voltage
? ± 5% LED current accuracy
? <1 μ A shutdown current
? Over temperature protection
? UVLO
? Thin SOT23-6L package option
?
o o
Applications
? White/Blue LED driver for backlighting
lead package and a 2mm × 2mm MLF -8L package and
preserved with a low 1μA shutdown current.
The MIC3289 is available in a low profile Thin SOT23 6-
?
has a junction temperature range of –40 ° C to +125 ° C.
Data sheets and support documentation can be found on
-
-
-
-
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Cell phones
PDAs
GPS systems
Digital cameras
Multimedia / MP3 players
Micrel’s web site at www.micrel.com.
? LED flashlights
? Constant current power supplies
___________________________________________________________________________________________________________
MicroLead Frame and MLF are registered trademarks of Amkor Technologies.
Micrel Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel +1 ( 408 ) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
June 2007
M9999-061807
(408) 944-0800
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC3291 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control |
| MIC3291-18YD6 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control |
| MIC3291-18YD6 TR | 功能描述:LED照明驱动器 1.2MHz PWM WLED Driver w/Internal Schottky Diode & Single-Wire Linear Brightness Control (Lead Free) RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MIC3291-18YM6 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control |
| MIC3291-18YML TR | 功能描述:LED照明驱动器 1.2MHz PWM WLED Driver w/Internal Schottky Diode & Single-Wire Linear Brightness Control (Lead Free) RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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