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| 型号： | MIC3202-1YME TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR HB 37V 1A 8SOIC |
| 标准包装： | 2,500 |
| 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 ~ 37 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： | 带卷 (TR) |
Micrel, Inc.
Functional Diagram
Figure 1. MIC3202/MIC3202-1 Functional Block Diagram
MIC3202
Functional Description
The MIC3202 is a hysteretic step-down driver which
regulates the LED current over wide input voltage range
and capable of driving up to eight 1A LEDs in series.
The device operates from a 6V to 37V input. When the
input voltage reaches 6V, the internal 5V VCC is
regulated and the LX pin is pulled low if the EN pin and
DIM pin are high. The inductor current builds up linearly.
When the CS pin voltage hits V CS(MAX) with respect to V IN ,
the 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 MOSFET turns on and the cycle repeats.
The frequency of operation depends upon the input voltage,
total LED voltage drop, LED current and temperature. The
calculation for frequency of operation is given in the
Application Information section.
The MIC3202 has an EN pin which gives the flexibility to
enable and disable the output with logic high and low
signals.
The MIC3202 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 of DIM pin
from 1% to 99%.
September 2010
9
M9999-091710-A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC3202YME | 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 |
| MIC3202YME EV | 功能描述:LED 照明开发工具 37V/ 1A HBLED Driver with High-Side Current Sense - Evaluation Board RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MIC3202YME TR | 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 |
| MIC3203 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High-Brightness LED Driver Controller with High-Side Current Sense |
| MIC3203-1YM | 功能描述:LED照明驱动器 HBLED Driver Controller 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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