LM3414
- Supports LED Power up to 60 W(1): 18x 3-W
HBLEDs - RequiresNo External Current Sensing Resistor
- ±3% LED Current Accuracy
- Up to 96% Efficiency
- High Contrast Ratio (Minimum Dimming Current
Pulse Width <10 µS) - Integrated Low-Side N-Channel MOSFET
- Adjustable Constant LED Current From 350 mA to
1000 mA - Support Analog Dimming and Thermal Fold-Back
- Wide Input Voltage Range:
- 4.5 V to 42 V (LM3414)
- 4.5 V to 65 V (LM3414HV)
- Constant Switching Frequency Adjustable from
250 kHz to 1000 kHz - Thermal Shutdown Protection
- Power Enhanced SOIC-8 or 3 mm × 3 mm
WSON-8 Package
The LM3414 and LM3414HV are 1-A 60-W(1) common anode-capable constant current buck LED drivers. They are suitable for driving single string of 3-W HBLED with up to 96% efficiency. They accept input voltages from 4.5 VDC to 65 VDC and deliver up to 1-A average LED current with ±3% accuracy. The integrated low-side N-channel power MOSFET and current sensing element realize simple and low component count circuitry, as no bootstrapping capacitor and external current-sensing resistor are required. An external small-signal resistor to ground provides very fine LED current adjustment, analog dimming, and thermal fold-back functions.
Constant switching frequency operation eases EMI. No external loop compensation network is needed. The proprietary Pulse-Level-Modulation (PLM) control method benefits in high conversion efficiency and true average LED current regulation. Fast response time realizes fine LED current pulse fulfilling the 240 Hz 256-step dimming resolution requirement for general lighting.
The LM3414 and LM3414HV are available in SOIC-8 and 3 mm × 3 mm WSON-8 packages.
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 | LM3414/HV 1-A, 60-W Common Anode-Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor データシート (Rev. F) | PDF | HTML | 2015/12/03 | ||
| ホワイト・ペーパー | Common LED Functions and LED Driver Design Considerations.. | 英語版 | 2020/09/21 | |||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| 技術記事 | Color the world with what’s next in RGBW LED light source technology – part 1 | PDF | HTML | 2017/08/03 | |||
| アプリケーション・ノート | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/05/03 |
設計と開発
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| 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 |
|---|---|---|
| WSON (NGQ) | 8 | Ultra Librarian |
| HSOIC (DDA) | 8 | Ultra Librarian |
購入と品質
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