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| 型号： | MIC2287YD5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 1/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT TSOT-5 |
| 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： | 1.05MHz ~ 1.35MHz |
| 电源电压： | 2.5 V ~ 10 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 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： | 576-1728-6 |
MIC2287
General Description
The MIC2287 is a 1.2MHz pulse width modulated (PWM),
boost-switching regulator that is optimized for constant-
current, white LED driver applications. With a maximum
output voltage of 34V and a switch current of over 500mA,
the MIC2287 easily drives a string of up to 8 white LEDs in
series, ensuring uniform brightness and eliminating several
ballast resistors.
The MIC2287 implements a constant frequency, 1.2MHz
PWM control scheme. The high frequency PWM operation
saves board space by reducing external component sizes.
The added bene?t of the constant frequency PWM scheme
as opposed to variable frequency topologies is much lower
noise and input ripple injected back to the battery source.
To optimize ef?ciency, the feedback voltage is set to only
95mV. This reduces the power dissipation in the current set
resistor and allows the lowest total output voltage, hence
minimal current draw from the battery.
The MIC2287 is available with 3 levels of overvoltage protec-
tion, 15V, 24V, and 34V. This allows designers to choose the
smallest possible external components with the appropriate
voltage ratings for their applications.
The MIC2287 is available in low pro?le Thin SOT-23 5-lead and
an 8-lead 2mm × 2mm MLF? package options. The MIC2287
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.
Micrel, Inc.
MIC2287
1 .2MHz PWM White LED Driver with OVP in
2mm × 2mm MLF? and Thin SOT-23
Features
? 2.5V to 10V input voltage
? Output voltage up to 34V
? Over 500mA switch current
? 1.2 MHz PWM operation
? 95mV feedback voltage
? Output Overvoltage Protection (OVP)
? Options for 15V, 24V, and 34V OVP
? <1% line and load regulation
? <1μA shutdown current
? Over-temperature protection
? UVLO
? Low pro?le Thin SOT-23-5 package option
? 8-lead 2mm × 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
? Photo ?ash LED driver
? LED ?ashlights
? Constant current power supplies
Typical Application
10μH
CMDSH-3
10μH
CMDSH-3
1-Cell
Li Ion
1μF
5
4
MIC2287BD5
VIN SW
EN FB
GND
2
1
3
95mV
6.3?
0.22μF
1-Cell
Li Ion
1μF
MIC2287-34BML
VIN SW
EN OVP
FB
GND
95mV
6.3?
0.22μF
3-Series White LED Driver in Thin SOT-23
6-Series White LED Driver
with Output OVP in 2mm × 2mm MLF?-8
MLF and Micro LeadFrame are trademarks of Amkor Technology, Inc.
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
July 2005
1
M9999-070105
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC2288 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1A 1.2 MHZ PWM BOOST CONVERTER IN THIN SOT 23 AND 2 X MLF |
| MIC2288_05 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1A 1.2MHz PWM Boost Converter in Thin SOT-23 and 2×2 MLF |
| MIC2288BD5 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1A 1.2 MHZ PWM BOOST CONVERTER IN THIN SOT 23 AND 2 X MLF |
| MIC2288BD5 TR | 功能描述:IC REG BOOST ADJ 1A TSOT23-5 RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
| MIC2288BML | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:1A 1.2MHz PWM Boost Converter in Thin SOT-23 and 2×2 MLF |
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