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.

• 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

• Input voltage (type)
• DC/DC
• Topology
• Buck
• Vin (Min) (V)
• 4.5
• Vin (Max) (V)
• 42
• Iout (Max) (A)
• 1
• Iq (Typ) (mA)
• 3.2
• Features
• Adjustable Switch Frequency, Enable/Shutdown, Integrated Switch, Thermal Shutdown
• Operating temperature range (C)
• -40 to 125
• Dimming method
• Analog, PWM

LM3414的完整型号有：LM3414MR/NOPB、LM3414MRX/NOPB、LM3414SD/NOPB、LM3414SDX/NOPB，以下是这些产品的关键参数及官网采购报价：

LM3414MR/NOPB，工作温度：-40 to 125，封装：SO PowerPAD (DDA)-8，包装数量MPQ：95个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM3414MR/NOPB的批量USD价格：.708（1000+）

LM3414MRX/NOPB，工作温度：-40 to 125，封装：SO PowerPAD (DDA)-8，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LM3414MRX/NOPB的批量USD价格：.59（1000+）

LM3414SD/NOPB，工作温度：-40 to 125，封装：WSON (NGQ)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3414SD/NOPB的批量USD价格：.708（1000+）

LM3414SDX/NOPB，工作温度：-40 to 125，封装：WSON (NGQ)-8，包装数量MPQ：4500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3414SDX/NOPB的批量USD价格：.59（1000+）

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