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參數(shù)資料
| 型號(hào)： | MIC2289 |
| 廠商： | Micrel Semiconductor,Inc. |
| 元件分類(lèi)： | LED驅(qū)動(dòng)器 |
| 英文描述： | 2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| 中文描述： | 2毫米】2mm的白光LED內(nèi)部肖特基二極管和OVP驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 1/9頁(yè) |
| 文件大?。?/td> | 88K |
| 代理商： | MIC2289 |
August, 2004
1
M9999-081104
MIC2289
Micrel
MIC2289
2mm
×
2mm White LED Driver
with Internal Schottky Diode and OVP
General Description
The MIC2289 is a PWM (pulse width modulated), boost-
switching regulator that is optimized for constant-current
white LED driver applications. The MIC2289 features an
internal Schottky diode and three levels of output overvoltage
protection providing a small size and efficient DC/DC solution
that requires only four external components.
To optimize efficiency, the feedback voltage is set to only
95mV. This reduces power dissipation in the current set
resistor and allows the lowest total output voltage, hence
minimal current draw from the battery.
The MIC2289 implements a constant frequency 1.2MHz
PWM control scheme. The high frequency, PWM operation
saves board space by reducing external component sizes.
The added benefit of the constant frequency PWM scheme in
caparison to varible frequency is much lower noise and input
ripple injected to the input power source.
The MIC2289 clamps the output voltage in case of open LED
conditions, protecting itself and the output capacitor. The
MIC2289 is available with three output OVP options of 15V,
24V, and 34V. The different OVP options allows the use of
the smallest possible output capacitor with the appropriate
voltage rating for a given application.
The MIC2289 is available in a 2mm
×
2mm 8-pin MLF
package and has a junction 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
10
μ
H
0.22
μ
F/16V
6.3
95mV
1-Cell
Li Ion
1
μ
F
MIC2289-15BML
VIN
EN
SW
FB
OUT
GND
3-Series White LED Driver
Features
2.5V to 10V input voltage
Output voltage up to 34V
Internal Schottky diode
15V, 24V, 34V output OVP options
1.2 MHz PWM operation
Over 500mA switch current
95mV feedback voltage
<1% line and load regulation
<1mA shutdown current
Overtemperature protection
UVLO
2mm
×
2mm 8-pin MLF
package
–
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. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
MicroeadFrame and MLF are trademarks of Amkor Technology, Inc.
70
72
74
76
78
80
82
0
5
10
I
OUT
(mA)
15
20
25
E
3-Series LED Efficiency
V
IN
=3.6V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC2289-15BML | 2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| MIC2289-15YML | 2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| MIC2289-24BML | 2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| MIC2289-24YML | 2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| MIC2289-34BML | 2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2289_11 | 制造商:MICREL 制造商全稱(chēng):Micrel Semiconductor 功能描述:White LED Driver Internal Schottky Diode and OVP |
| MIC2289-15BML | 制造商:MICREL 制造商全稱(chēng):Micrel Semiconductor 功能描述:2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| MIC2289-15BML TR | 功能描述:IC LED DRIVER WHITE BCKLGT 8-MLF RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類(lèi)型 - 主要:背光 類(lèi)型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類(lèi)型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁(yè)面:1371 (CN2011-ZH PDF) 其它名稱(chēng):BD1603NUV-E2CT |
| MIC2289-15YML | 制造商:MICREL 制造商全稱(chēng):Micrel Semiconductor 功能描述:2mm 】 2mm White LED Driver with Internal Schottky Diode and OVP |
| MIC2289-15YML TR | 功能描述:LED照明驅(qū)動(dòng)器 2x2mm White LED Driver w/ 15V 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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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