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参数资料
| 型号： | MIC3201YME |
| 厂商： | Micrel Inc |
| 文件页数： | 8/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER 8ESOIC |
| 特色产品： | MIC3201 High Brightness LED Driver |
| 标准包装： | 95 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 1MHz |
| 电源电压： | 6 V ~ 20 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOIC-EP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | 576-3659-5 MIC3201YME-ND |
Micrel, Inc.
Functional Diagram
Figure 1. MIC3201 Block Diagram
MIC3201
Functional Description
The MIC3201 is a hysteretic step-down regulator which
regulates the LED current over wide input voltage range
and capable of driving up to four, 1A LEDs in series.
The device operates from a 6V to 20V input voltage range,
and includes an integrated 1.0A power switch. When the
input voltage approaches 6V, the internal 5V VCC is
regulated and the integrated MOSFET is turned on if EN
pin and DIM pin are high. The inductor current builds up
linearly. When the CS pin voltage hits the V CS(MAX) with
respect to V IN , the internal MOSFET turns off and the
Schottky diode takes over and returns the current to V IN .
Then the current through inductor and LEDs starts
decreasing. When CS pin hits V CS(MIN) , the internal
MOSFET turns on and the cycle repeats.
The frequency of operation depends upon input voltage,
total LEDs voltage drop, LED current and temperature.
The calculation for frequency of operation is given in
application section.
The MIC3201 has an on board 5V regulator which is for
internal use only. Connect a 1μF capacitor on VCC pin to
analog ground.
The MIC3201 has an EN pin which gives the flexibility to
enable and disable the output with logic high and low
signals.
The MIC3201 also has a DIM pin which can turn on and off
the LEDs if EN is in HIGH state. This DIM pin controls the
brightness of the LED by varying the duty cycle from 1% to
99%.
February 2011
8
M9999-021011-B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC3201YME EV | 制造商:Micrel Inc 功能描述: |
| MIC3201YME TR | 功能描述:LED照明驱动器 HBLED Driver with High-Side Current Sense 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 |
| MIC3202 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Brightness LED Driver with Integrated MOSFET and High-Side Current Sense |
| MIC3202-1 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Brightness LED Driver with Integrated MOSFET and High-Side Current Sense |
| MIC3202-1YME | 功能描述:LED照明驱动器 37V/ 1A HBLED Driver with High-Side Current Sense 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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