この製品には新バージョンがあります
LM3407
- Input Operating Range 4.5 V to 30 V
- Output Voltage Range: 0.1 VIN to 0.9 VIN
- Accurate Constant Current Output
- 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 Undervoltage Lockout (UVLO)
- Thermal Shutdown Protection
- MSOP-8 PowerPAD Package
The LM3407 device is a constant current output floating buck switching 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-channel MOSFET that makes the application solution compact and simple to implement. An external 1% thick-film resistor 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 exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | LM3407 350-mA, Constant Current Output Floating Buck Switching Converter for High-Power LEDs データシート (Rev. C) | PDF | HTML | 2016/11/15 | ||
| ホワイト・ペーパー | Common LED Functions and LED Driver Design Considerations.. | 英語版 | 2020/09/21 | |||
| アプリケーション・ノート | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/05/03 | ||||
| アプリケーション・ノート | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | 2013/04/23 | ||||
| アプリケーション・ノート | Application Note 1763 LM3407 Evaluation Board Reference Design (jp) | 2009/01/21 |
設計と開発
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LM3407EVAL — 350mA、定電流出力、フローティング降圧スイッチング・レギュレータ評価ボード
The LM3407 evaluation board contains a Pulse-Width-Modulation (PWM) floating buck converter with an integrated N-Channel power MOSFET and is designed to provide a constant current output for driving high power LEDs, such as the Lumileds Luxeon® power LEDs and OSRAM Golden DRAGON® LED.
LM3407DESIGN-CALC — LM3407 コンポーネント カリキュレータ
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| HVSSOP (DGN) | 8 | Ultra Librarian |