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參數資料
| 型號： | LM3405AXMK |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.6MHz, 1A Constant Current Buck LED Driver with Internal Compensation in Tiny SOT23 Package |
| 中文描述： | 2.8 A SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封裝： | TSOT-23, 6 PIN |
| 文件頁數： | 1/20頁 |
| 文件大小： | 396K |
| 代理商： | LM3405AXMK |
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 |
參數描述 |
|---|---|
| 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 |
| LM3405AXMKE | 制造商:Texas Instruments 功能描述:LED DRVR 1Segment 3.3V/5V/9V/12V 6-Pin TSOT T/R 制造商:Texas Instruments 功能描述:LED DRIVER, BUCK, 1.6MHZ, POWERWISE 制造商:Texas Instruments 功能描述:LED DRIVER, BUCK, 1.6MHZ, POWERWISE; Topology:Buck; No. of Outputs:1; Output Current:1A; Output Voltage:20V; Driver Case Style:TSOT-23; Input Voltage Min:3V; Input Voltage Max:22V; Dimming Control Type:PWM; Switching ;RoHS Compliant: Yes 制造商:Texas Instruments 功能描述:1A Constant Curr LED Driver, LM3405AXMKE |
| LM3405AXMKE/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 |
| LM3405AXMKX | 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 Package |
| LM3405AXMKX/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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