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| 型号： | MIC3203-1YM |
| 厂商： | Micrel Inc |
| 文件页数： | 10/21页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER CTLR HB 8SOIC |
| 特色产品： | MIC3203 LED Driver Controllers |
| 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： | 无 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 1.5MHz |
| 电源电压： | 4.5 V ~ 42 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | 576-3660-5 MIC3203-1YM-ND |
Micrel, Inc.
Functional Diagram
Figure 1. MIC3203/MIC3203-1 Block Diagram
MIC3203
Functional Description
The MIC3203 is a hysteretic step-down driver which
regulates the LED current over wide input voltage range.
The device operates from a 4.5V to 42V input MOSFET
voltage range and provides up to 0.5A source and 1A
sink drive capability. When the input voltage reaches
4.5V, the internal 5V VCC is regulated and the DRV pin
is pulled high to turn on an external MOSFET 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 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 input voltage, total
LEDs voltage drop, LED current and temperature. The
calculation for frequency of operation is given in application
section.
The MIC3203 has an on board 5V regulator which is for
internal use only. Connect a 1μF capacitor on VCC pin to
analog ground.
The MIC3203 has an EN pin which gives the flexibility to
enable and disable the output with logic high and low
signals.
The MIC3203 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%.
March 2010
10
M9999-032910-A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC3203-1YM EV | 功能描述:LED 照明开发工具 HBLED Driver Controller 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: |
| MIC3203-1YM TR | 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 |
| MIC3203YM | 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 |
| MIC3203YM EV | 功能描述:LED 照明开发工具 HBLED Driver Controller 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: |
| MIC3203YM TR | 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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