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| 型号： | MIC4801YM |
| 厂商： | Micrel Inc |
| 文件页数： | 6/12页 |
| 文件大小： | 0K |
| 描述： | IC WHITE LED DVR 600MA 1CH 8SOIC |
| 标准包装： | 95 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 白色 LED |
| 电源电压： | 3 V ~ 5.5 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 |
| 其它名称： | 576-3856-5 |
Micrel Inc.
Functional Diagram
Figure 1. MIC4801 Functional Block Diagram
MIC4801
Functional Description
The MIC4801 is a single channel linear LED driver with a
maximum 600mA current capability. The LED driver is
designed to maintain proper current regulation with LED
current accuracy of ±10%. The dropout is 130mV at
400mA. The low dropout of the linear drivers allows the
LEDs to be driven directly from the battery voltage and
eliminates the need for boost or large and inefficient
charge pumps. The maximum LED current for each
channel is set via an external resistor. Dimming is
controlled by applying a PWM signal to the EN pin. The
MIC4801 accommodates a wide PWM frequency range
as outlined in the application information section.
Block Diagram
As shown in Figure 1, the MIC4801 consists of current
mirrors set to copy a master current determined by R SET .
The linear LED drivers have a designated control block
for enabling and dimming of the LEDs. The MIC4801
dimming is controlled by the Ultra Fast PWM? control
block that receives PWM signals for dimming.
January 2011
6
M9999-011811-A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC4801YM TR | 功能描述:LED照明驱动器 600mA Single Channel WLED Driver w/ Ultrafast PWM Control 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 |
| MIC4801YM-TR | 功能描述:LED 驱动器 IC 1 输出 线性 PWM 调光 600mA 8-SOIC 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:线性 拓扑:- 内部开关:是 输出数:1 电压 - 供电（最低）:3V 电压 -?供电（最高）:5.5V 电压 - 输出:- 电流 - 输出/通道:600mA 频率:- 调光:PWM 应用:照明 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商器件封装:8-SOIC 标准包装:1 |
| MIC4802 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:High Efficiency 800mA Single Channel Linear WLED Driver with Ultra Fast PWM? Control |
| MIC4802YME | 功能描述:LED照明驱动器 800mA Single Channel WLED Driver w/ Ultrafast PWM Control 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 |
| MIC4802YME TR | 功能描述:LED照明驱动器 800mA Single Channel WLED Driver w/ Ultrafast PWM Control 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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