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參數(shù)資料
January 18, 2008
LM3407
350 mA, Constant Current Output Floating Buck Switching
Converter for High Power LEDs
General Description
The LM3407 is a constant current output floating buck switch-
ing converter designed to provide constant current to high
power LEDs. The device is ideal for automotive, industrial and
general lighting applications. The LM3407 has an integrated
power N-MOSFET that makes the application solution com-
pact and simple to implement. An external 1% thick-film re-
sistor allows the converter output voltage to adjust as needed
to deliver constant current within 10% accuracy to a serially
connected LED string of varying number and type. Converter
switching frequency is adjustable from 300 kHz to 1 MHz. The
LM3407 features a dimming input to enable LED brightness
control by Pulse Width Modulation (PWM). Additionally, a
separate enable pin allows for low power shutdown. An ex-
posed pad eMSOP-8 package provides excellent heat dissi-
pation and thermal performance. Input UVLO and output
open-circuit protection ensure a robust LED driver solution.
Features
■
Input operating range 4.5V to 30V
■
Output voltage range: 0.1V
IN
to 0.9V
IN
■
Accurate constant current output
■
Cycle-by-Cycle current limit
■
Independent device enable (CMOS compatible) and PWM
dimming control
■
Converter switching frequency adjustable from 300 kHz to
1 MHz
■
No external control loop compensation required
■
Supports ceramic and low ESR output capacitors
■
Input Under Voltage Lock Out (UVLO)
■
Thermal shutdown protection
■
eMSOP-8 Package
Applications
■
LED Driver
■
Constant Current Source
■
Automotive Lighting
■
General Illumination
■
Industrial Lighting
Typical Application
30046635
2008 National Semiconductor Corporation
300466
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3407MYX/NOPB | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3409 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PFET Buck Controller for High Power LED Drives |
| LM3409_10 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PFET Buck Controller for High Power LED Drives |
| LM3409EVAL | 功能描述:BOARD EVALUATION FOR LM3409 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - LED 驅(qū)動器 系列:PowerWise® 標(biāo)準(zhǔn)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(diào)光 輸入電壓:2.7 ~ 5.5 V 已供物品:板 已用 IC / 零件:LM3508 相關(guān)產(chǎn)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 |
| LM3409EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 LM3409 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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