LM3414HV
- 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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM3414/HV 1-A, 60-W Common Anode-Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor datasheet (Rev. F) | PDF | HTML | 2015/12/3 | ||
| 白皮書 | Common LED Functions and LED Driver Design Considerations | 2020/9/21 | ||||
| 應用說明 | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | 2013/5/3 | ||||
| EVM User's guide | AN-2076 LM3414HV 1A 65V LED Driver Evaluation Board (Rev. B) | 2010/8/10 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| WSON (NGQ) | 8 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。