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參數(shù)資料
| 型號(hào)： | MIC2297 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 40V PWM Boost Regulator White LED Driver |
| 中文描述： | 40V PWM升壓穩(wěn)壓白光LED驅(qū)動(dòng)器 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大小： | 272K |
| 代理商： | MIC2297 |
MIC2297
40V PWM Boost Regulator
White LED Driver
General Description
The MIC2297 is a 600KHz PWM boost-switching regulator
that is optimized for driving 6-10 series white LEDs. With
its internal 40V switch and a guaranteed switch current of
1.2A, the MIC2297 easily drives a string of 10 white LEDs
in series at 20mA, ensuring a high level of brightness and
eliminating several ballast resistors.
MLF and
Micro
LeadFrame is a trademark of Amkor Technology
Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (
408
) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com
May 2005
M9999-050305
(408) 955-1690
The MIC2297 implements constant frequency 600KHz
PWM control. The high frequency PWM operation saves
board space by reducing external component sizes. The
added benefit of the constant frequency PWM operation is
much lower noise and input ripple injected back to the
battery source than with variable frequency topologies.
To optimize efficiency, the feedback voltage is set to
200mV. This reduced voltage reduces the power
dissipation in the current set resistor, and allows the lowest
total output voltage, hence minimal current draw from the
battery.
The MIC2297 is available with output over-voltage
protection that protects the IC and external components in
case of open LED conditions.
The MIC2297 is available in low profile small size 2.5mm x
2.5mm MLF-10L package. The MIC2297 has a junction
temperature range of –40°C to +125°C.
Features
Applications
PDAs
GPS systems
Smart phones
Mini PCs
Digital cameras
IP phones
LED flashlights
2.5V to 10V input voltage range
Output voltage up to 40V
1.2A switch current
600KHz PWM operation
Trimmed 200mV feedback voltage
Output over voltage protection (fixed or adjustable)
PWM Brightness Control
DAC Brightness Control
<1% line regulation
1μA shutdown current
Over temperature protection
UVLO
2.5mm x 2.5mm MLF-10L package
–40
o
C to +125
o
C junction temperature range
___________________________________________________________________________________________________________
Typical Applications
VIN
EN
SW
FB
MIC2297
-
42BML
0.47μF
/50V
6.8μH-22μH
10
OVP
PGND
1μF
1-Cell
Li Ion
3V to 4.2V
BRT
REF
AGND
COMP
1μF
PWM
VIN
EN
SW
FB
MIC2297
-
42BML
0.47μF
/50V
6.8μH-22μH
10
OVP
PGND
1μF
1-Cell
Li Ion
3V to 4.2V
BRT
REF
AGND
COMP
0.1μF
1μF
0.1μF
10 Series LED Driver with Output OVP
10 Series LED Driver with PWM Brightness Control
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MIC2297-15YML | 40V PWM Boost Regulator White LED Driver |
| MIC2297-42YML | 40V PWM Boost Regulator White LED Driver |
| MIC2507 | Quad Integrated High-Side Switch Not Recommended for New Designs |
| MIC2507BM | Quad Integrated High-Side Switch Not Recommended for New Designs |
| MIC2544 | Programmable Current Limit High-Side Switch(可編程 限流高邊開(kāi)關(guān)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC2297_08 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:40V PWM Boost Regulator White LED Driver |
| MIC2297-15YML | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:40V PWM Boost Regulator White LED Driver |
| MIC2297-15YML TR | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.2MHz 1.2A PWM Boost Converter (Lead Free) RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MIC2297-38YML TR | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1.2MHz 1.2A PWM Boost Converter (Lead Free) RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MIC2297-38YML-TR | 功能描述:LED 驅(qū)動(dòng)器 IC 1 輸出 DC DC 穩(wěn)壓器 升壓（升壓） PWM 調(diào)光 1.2A（開(kāi)關(guān)） 10-MLF?（3x3） 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):停產(chǎn) 類型:DC DC 穩(wěn)壓器 拓?fù)?升壓（升壓） 內(nèi)部開(kāi)關(guān):是 輸出數(shù):1 電壓 - 供電（最低）:2.5V 電壓 -?供電（最高）:10V 電壓 - 輸出:- 電流 - 輸出/通道:1.2A（開(kāi)關(guān)） 頻率:600kHz 調(diào)光:PWM 應(yīng)用:- 工作溫度:-40°C ~ 125°C （TJ） 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤(pán)，10-MLF? 供應(yīng)商器件封裝:10-MLF?（3x3） 標(biāo)準(zhǔn)包裝:1 |
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