收藏本站
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
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
MIC3291-18YML TR IC PWM WLED DVR 1.8V 1.2MHZ 8MLF
MIC4100YM IC DRIVER MOSFET 100V CMOS 8SOIC
MIC4102YM IC DRIVER MOSFET 100V TTL 8SOIC
MIC4103YM IC MOSFET DRIVER 100V CMOS 8SOIC
MIC4124YME IC MOSFET DRVR DUAL NONINV 8SOIC
MIC4128YMME IC DRIVER MOSFET 1.5A DUAL 8MSOP
MIC4129YME IC MOSFET DRIVER 6A INVERT 8SOIC
MIC4223YM IC MOSFET DVR DUAL-INV 4A 8-SOIC
相关代理商/技术参数
MIC3289-16YD6-TR 功能描述:LED 驱动器 IC 1 输出 DC DC 稳压器 升压（升压） 1.2A（开关） TSOT-23-6 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:DC DC 稳压器 拓扑:升压（升压） 内部开关:是 输出数:1 电压 - 供电（最低）:2.5V 电压 -?供电（最高）:6.5V 电压 - 输出:- 电流 - 输出/通道:1.2A（开关） 频率:1.2MHz 调光:- 应用:背光 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 供应商器件封装:TSOT-23-6 标准包装:1
MIC3289-16YML 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 True 1-Wire Digital Control
MIC3289-16YML TR 功能描述:直流/直流开关调节器 1.2MHz 0.5A Switch WLED Driver with Digital Brightness Control (lead free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MIC3289-16YML-TR 功能描述:LED 驱动器 IC 1 输出 DC DC 稳压器 升压（升压） 1.2A（开关） 8-MLF?（2x2） 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:有效 类型:DC DC 稳压器 拓扑:升压（升压） 内部开关:是 输出数:1 电压 - 供电（最低）:2.5V 电压 -?供电（最高）:6.5V 电压 - 输出:- 电流 - 输出/通道:1.2A（开关） 频率:1.2MHz 调光:- 应用:背光 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 供应商器件封装:8-MLF?（2x2） 标准包装:1
MIC3289-24YD6 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 True 1-Wire Digital Control
MIC3289-24YD6 TR 功能描述:直流/直流开关调节器 1.2MHz 0.5A Switch WLED Driver with Digital Brightness Control (lead free) RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
MIC3289-24YD6TR 制造商:Micrel 功能描述:1.2MHz 0.5A Sw LED Drvr, MIC3289-24YD6
MIC3289-24YD6-TR 功能描述:LED 驱动器 IC 1 输出 DC DC 稳压器 升压（升压） 1.2A（开关） TSOT-23-6 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:DC DC 稳压器 拓扑:升压（升压） 内部开关:是 输出数:1 电压 - 供电（最低）:2.5V 电压 -?供电（最高）:6.5V 电压 - 输出:- 电流 - 输出/通道:1.2A（开关） 频率:1.2MHz 调光:- 应用:背光 工作温度:-40°C ~ 125°C （TJ） 安装类型:表面贴装 封装/外壳:SOT-23-6 细型，TSOT-23-6 供应商器件封装:TSOT-23-6 标准包装:1