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参数资料
| 型号： | MIC3232YMM |
| 厂商： | Micrel Inc |
| 文件页数： | 8/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HP CONS CURR 10-MSOP |
| 标准包装： | 100 |
| 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： | 通用 |
| 频率： | 400kHz |
| 电源电压： | 6 V ~ 45 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1082 (CN2011-ZH PDF) |
| 其它名称： | 576-3405-5 |
Micrel, Inc.
Functional Description
A constant output current converter is the preferred
method for driving LEDs. Small variations in current have a
minimal effect on the light output, whereas small variations
in voltage have a significant impact on light output. The
MIC323x family of LED drivers are specifically designed to
operate as constant current LED Drivers and the typical
application schematic is shown in Figure 1.
The MIC323x family is designed to operate as a boost
controller, where the output voltage is greater than the
input voltage. This configuration allows for the design of
multiple LEDs in series to help maintain color and
brightness. The MIC323x family can also be configured as
a SEPIC controller, where the output voltage can be either
above or below the input voltage.
The MIC3230/1/2 have a very wide input voltage range,
between 6V and 45V, to help accommodate for a diverse
MIC3230/1/2
The MIC3230/1/2 features a low impedance gate driver
capable of switching large MOSFETs. This low impedance
helps provide higher operating efficiency.
The MIC323x family can control the brightness of the
LEDs via its PWM dimming capability. Applying a PWM
signal (up to 500Hz) to the PWMD pin allows for control of
the brightness of the LED.
Each member of the MIC323x family employs peak current
mode control. Peak current mode control offers
advantages over voltage mode control in the following
manner. Current mode control can achieve a superior line
transient performance compared to voltage mode control
and through small signal analysis (not shown here),
current mode control is easier to compensate than voltage
mode control, thus allowing for a less complex control loop
stability design. Figure 2 shows the functional block
diagram.
range of input voltage applications. In addition, the LED
current can be programmed to a wide range of values
through the use of an external resistor. This provides
design flexibility in adjusting the current for a particular
application need.
Figure 2. MIC3230 Functional Block Diagram
March 2011
8
M9999-030311-D
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC3232YMM EV | 功能描述:LED 照明开发工具 400kHz Fixed Frequency Boost Driver Controller for High Power LEDs - 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: |
| MIC3232YMM TR | 功能描述:LED照明驱动器 400kHz Fixed Frequency Boost Driver Controller for High Power LEDs 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 |
| MIC3263 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Six-Channel WLED Driver for Backlighting Applications with Flicker-Free Dimming |
| MIC3263YML | 制造商:Micrel 功能描述:6 Channel WLED Driver for Backlighting |
| MIC3263YML EV | 制造商:Micrel Inc 功能描述: |
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