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參數資料
| 型號： | MIC3287 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類： | LED驅動器 |
| 英文描述： | 1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL |
| 中文描述： | 1.2MHz的白光LED驅動器的PWM與OVP的薄型SOT - 23和2毫米x2毫米漏磁 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 342K |
| 代理商： | MIC3287 |
January 2006
1
M9999-010306
MIC3287
Micrel, Inc.
MIC3287
1
.2MHz PWM White LED Driver with OVP in
Thin SOT-23 and 2mm x 2mm MFL
General Description
The MIC3287 is a 1.2MHz pulse width modulated (PWM)
step-up switching regulator that is optimized for constant
current white LED driving applications. With a maximum
output voltage of 24V and a switch current of over 350mA,
the MIC3287 drives a string of up to 4 white LEDs in series,
ensuring uniform brightness and eliminating several ballast
resistors.
The MIC3287 implements a constant frequency 1.2MHz PWM
current-mode control scheme. The high frequency PWM op-
eration saves board space by reducing external component
sizes. The added benefit of the constant frequency PWM
control scheme as opposed to variable frequency control
schemes is much lower noise and input ripple injected back
to the battery source. To optimize efficiency, the feedback
voltage is set to only 250mV. The MIC3287 is also available
with a maximum 24V over-voltage protection.
The MIC3287 is available in low profile Thin SOT-23 5-pin
and Thin SOT-23 6-pin packages. The MIC3287 has a junc-
tion temperature range of –40°C to +125°C.
All support documentation can be found on Micrel’s web site
at: www.micrel.com.
Typical Application
10μH
0.22μF
250mV
1-Cell
Li Ion
1μF
2
3
1
4
5
MIC3287YD5
VIN
EN
SW
FB
GND
3-Series White LED Driver in Thin SOT-23-5
Features
2.8V to 5.5V Input Voltage
350mA Switch Current
1.2 MHz PWM Operation
250mV Feedback Voltage
24V Output Over-Voltage Protection (OVP) Option
<1% Line and Load Regulation
<1μA Shutdown Current
Over-Temperature Protection
Under-Voltage Lock Out (UVLO)
Low Profile Thin SOT-23-5 Package Option
Low Profile Thin SOT-23-6 Package Option
8-pin 2mm x 2mm MLF Package Option
–40°C to +125°C Junction Temperature Range
Applications
White LED Driver for Backlighting:
- Cell phones
- PDAs
- GPS systems
- Digital cameras
- MP3 players
- IP phones
LED Flashlights
Constant Current Power Supplies
Micrel, Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
MLF and Micro
Lead
Frame are trademarks of Amkor Technology, Inc.
10μH
0.22μF
1μF
1-Cell
Li Ion
MIC3287-24YD6
6
VIN
EN
SW
OVP
FB
GND
250mV
5
1
3
4
4
4-Series White LED Driver
with Output OVP in Thin SOT-23-6
相關PDF資料 |
PDF描述 |
|---|---|
| MIC3287-24YD6 | 1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL |
| MIC3287-24YML | 1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL |
| MIC3287YD5 | 1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL |
| MIC3775-1.5BMM | 750mA UCap Low-Voltage Low-Dropout Regulator |
| MIC3775-1.65BMM | 750mA UCap Low-Voltage Low-Dropout Regulator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC3287_10 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:1.2MHz PWM White LED Driver with OVP in Thin SOT-23 and 2mm x 2mm MFL |
| MIC3287-24YD6 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC3287-24YD6 TR | 功能描述:LED照明驅動器 2x2mm White LED Driver w/ 24V OVP (Lead Free) RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| MIC3287-24YD6TR | 制造商:RF Micro Devices Inc 功能描述: |
| MIC3287-24YD6-TR | 功能描述:LED 驅動器 IC 1 輸出 DC DC 穩壓器 升壓（升壓） 模擬，PWM 調光 350mA（開關） TSOT-23-6 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態:停產 類型:DC DC 穩壓器 拓撲:升壓（升壓） 內部開關:是 輸出數:1 電壓 - 供電（最低）:2.8V 電壓 -?供電（最高）:6.5V 電壓 - 輸出:36V 電流 - 輸出/通道:350mA（開關） 頻率:1.2MHz 調光:模擬，PWM 應用:背光 工作溫度:-40°C ~ 125°C （TJ） 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細型，TSOT-23-6 供應商器件封裝:TSOT-23-6 標準包裝:1 |
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