LM3414 60W Common Anode Capable Constant Current Buck LED Driver Requires No Ext. Current Sensing Res | TI.com

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60W Common Anode Capable Constant Current Buck LED Driver Requires No Ext. Current Sensing Res


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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
  • 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


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Part number Order Input voltage (type) Vin (Min) (V) Vin (Max) (V) Iout (Max) (A) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Topology Dimming method Power factor correction (Min) Type Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Vref (V) UVLO thresholds on/off (V) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LM3414 Order now DC/DC     4.5     42     1     0.2     42     1     Buck     Analog
250     1000     3.2     0.2     3.75 / 3.45     Adjustable Switch Frequency
Integrated Switch
Thermal Shutdown    
-40 to 125     SO PowerPAD | 8
WSON | 8    
8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)
8WSON: 9 mm2: 3 x 3 (WSON | 8)