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參數資料
| 型號： | LM3405A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Package |
| 中文描述： | 1.6MHz的，第1A恒流降壓型LED在微型SOT23封裝和內部補償驅動器 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 396K |
| 代理商： | LM3405A |
October 2007
LM3405A
1.6MHz, 1A Constant Current Buck LED Driver with Internal
Compensation in Tiny SOT23 Package
General Description
The LM3405A is a 1A constant current buck LED driver de-
signed to provide a simple, high efficiency solution for driving
high power LEDs. With a 0.205V reference voltage feedback
control to minimize power dissipation, an external resistor
sets the current as needed for driving various types of LEDs.
Switching frequency is internally set to 1.6MHz, allowing
small surface mount inductors and capacitors to be used. The
LM3405A utilizes current-mode control and internal compen-
sation offering ease of use and predictable, high performance
regulation over a wide range of operating conditions. With a
maximum input voltage of 22V, it can drive up to 5 High-
Brightness LEDs in series at 1A forward current, with the
single LED forward voltage of approximately 3.7V. Additional
features include user accessible EN/DIM pin for enabling and
PWM dimming of LEDs, thermal shutdown, cycle-by-cycle
current limit and over-current protection.
Features
■
V
IN
operating range of 3V to 22V
■
Drives up to 5 High-Brightness LEDs in series at 1A
■
Thin SOT23-6 package
■
1.6MHz switching frequency
■
EN/DIM input for enabling and PWM dimming of LEDs
■
300m
NMOS switch
■
40nA shutdown current at V
IN
= 5V
■
Internally compensated current-mode control
■
Cycle-by-cycle current limit
■
Input voltage UVLO
■
Over-current protection
■
Thermal shutdown
Applications
■
LED Driver
■
Constant Current Source
■
Industrial Lighting
■
LED Flashlights
■
LED Lightbulbs
Typical Application Circuit
30015201
Efficiency vs LED Current (V
IN
= 12V)
30015273
2007 National Semiconductor Corporation
300152
www.national.com
L
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相關代理商/技術參數 |
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|---|---|
| LM3405A_08 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 and eMSOP Package |
| LM3405AEVAL | 功能描述:BOARD EVAL FOR LM3405 RoHS:否 類別:編程器，開發系統 >> 評估板 - LED 驅動器 系列:PowerWise® 標準包裝:1 系列:PowerWise® 電流 - 輸出 / 通道:20mA 輸出及類型:1，非隔離 輸出電壓:17V 特點:可調光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關產品:LM3508TLX-ND - IC LED DRVR WHT BCKLGT 9USMDLM3508TLDKR-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLCT-ND - IC LED DRVR WHT BCKLGT 9MICROSMDLM3508TLTR-ND - IC LED DRVR WHT BCKLGT 9MICROSMD |
| LM3405AEVAL/NOPB | 功能描述:LED 照明開發工具 LM3405A EVAL BOARD RoHS:否 制造商:Fairchild Semiconductor 產品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
| LM3405AXMK | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 and eMSOP Package |
| LM3405AXMK/NOPB | 功能描述:LED照明驅動器 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 |
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