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参数资料
| 型号： | MIC3289-24YML TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER WHITE BCKLGT 8-MLF |
| 标准包装： | 1 |
| 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： | 背光，闪灯/白光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz ~ 1.35MHz |
| 电源电压： | 2.5 V ~ 6.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘，8-MLF? |
| 供应商设备封装： | 8-MLF?（2x2） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1082 (CN2011-ZH PDF) |
| 其它名称： | 576-2713-6 |
Micrel, Inc.
Figure 1. MIC3289 Logic State Diagram
With an input supply voltage between 2.5V and 6.5V and
a logic-level LOW applied to the DC pin, the MIC3289
will enter State 0, shutdown, and remain there
consuming less than 1μA.
Start Up
Presuming no presetting brightness command is issued
(discussed in a later section), the MIC3289 will start-up
in its default state approximately 140μs (t START_UP ) after a
logic level high has been applied and maintained at the
MIC3289
DC pin. In the default state the LED drive current is at
the maximum brightness level of 15 and brightness
counter is set to count down mode. Any falling edges
during the t PROG_SETUP period will cause the initial
brightness level of the LEDs to be below the maximum
brightness level. This is discussed in more detail in the
Presetting Brightness section.
Figure 3. Shutdown Timing
Once the device is shutdown, the boost supply is
disabled and the LEDs are turned off. Brightness level
information stored in the MIC3289 prior to shutdown will
be lost.
Programming Pulse Counter Modes
Referring to the state diagram in Figure 1, notice that
there are two programming pulse counting modes. At
power up the MIC3289 defaults to State 1, the Count
Down Mode. The counting mode can be changed to
State 2, the Count Up Mode, by pulling the DC pin low
for a period equal to t MODE_UP (100μs to 160μs). The
device will remain in Count Up Mode until its state is
changed to Count Down Mode or by disabling the
MIC3289.
Figure 2. Typical Start-Up Timing
Shutdown
Whenever a logic-level LOW is applied to the DC input
pin for a period greater than or equal to
t SHUTDOWN (1260μs), the MIC3289 will return to State 0
entering its power saving shutdown mode.
Figure 4. Mode Change to Count Up
June 2007
9
M9999-061807
(408) 944-0800
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC3291 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control |
| MIC3291-18YD6 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control |
| MIC3291-18YD6 TR | 功能描述:LED照明驱动器 1.2MHz PWM WLED Driver w/Internal Schottky Diode & Single-Wire Linear Brightness Control (Lead Free) 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 |
| MIC3291-18YM6 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with Internal Schottky Diode and Single-Wire Linear Brightness Control |
| MIC3291-18YML TR | 功能描述:LED照明驱动器 1.2MHz PWM WLED Driver w/Internal Schottky Diode & Single-Wire Linear Brightness Control (Lead Free) 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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