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參數(shù)資料
| 型號： | LM3401 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Hysteretic PFET Controller for High Power LED Drive |
| 中文描述： | 遲滯PFET的控制器的高功率LED驅動 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 324K |
| 代理商： | LM3401 |
August 2007
LM3401
Hysteretic PFET Controller for High Power LED Drive
General Description
The LM3401 is a switching controller designed to provide
constant current to high power LEDs. The LM3401 drives an
external P-MOSFET switch for step-down (Buck) regulators.
The LM3401 delivers constant current within ±6% accuracy
to a wide variety and number of series connected LEDs. Out-
put current is adjusted with an external current sensing resis-
tor to drive high power LEDs in excess of 1A.
For improved accuracy and efficiency, the LM3401 features
dual-side hysteresis, very low reference voltage, and short
propagation delay. A cycle by cycle current limit provides pro-
tection against over current and short circuit failures. Addi-
tional features include adjustable hysteresis and a CMOS
compatible input pin for PWM dimming.
Features
■
Hysteretic Control for Speed and Simplicity
■
Input Operating Range of 4.5V-35V
■
1.5MHz maximum switching frequency
■
Low 200mV reference voltage
■
Programmable current limit
■
High speed CMOS compatible enable/dimming
■
Adjustable hysteresis
■
Input UVLO
■
No output capacitor required
■
MSOP-8 package
Applications
■
LED Driver
■
Battery Charger
Typical Application Circuit
30021401
2007 National Semiconductor Corporation
300214
www.national.com
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM3401_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Hysteretic PFET Controller for High Power LED Drive |
| LM340-10KC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM34012 | 制造商:GOL 功能描述:340 GOLDSTAR LOC#N10F8C 制造商:TI 功能描述:* |
| LM340-12 | 制造商:GOL 功能描述:340 GOLDSTAR LOC#N10F8C |
| LM340-15 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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