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DataSheet.in
LM3414/LM3414HV 1A 60W* Common Anode Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor
August 9, 2010
LM3414/LM3414HV 1A 60W* Common Anode Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor
General Description
The LM3414 and LM3414HV are 1A 60W* common anode capable constant current buck LED drivers. They are exceptionally suitable to drive single string of 3W HBLED with up to 96% efficiency. They accept input voltages from 4.5VDC to 65VDC and deliver up to 1A 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 smallsignal resistor to ground provides very fine LED current adjustment, analog dimming as well as 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 ePSOP-8 and 3mm x 3mm LLP-8 packages. *Thermal de-rating applies according to actual operation conditions
Features
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Support LED power up to 60W*: 18x 3W HBLEDs Requires NO 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 350mA to 1000mA Support analog dimming and thermal fold-back Wide input voltage range: 4.5V to 42V (LM3414) 4.5V to 65V (LM3414HV) Constant Switching Frequency adjustable from 250 kHz to 1000 kHz Thermal shutdown protection Power enhanced ePSOP-8 or 3mm x 3mm LLP-8 package
Appications
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High Power LED Driver Architectural Lighting, Office Troffer Automotive Lighting MR-16 LED Lamp
Simplified Application Schematic
30124801
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DataSheet.in
LM3414/LM3414HV
Connection Diagram
30124803
Ordering Information
Order Number LM3414MR LM3414MRX LM3414HVMR LM3414HVMRX LM3414SD LM3414SDX LM3414HVSD LM3414HVSDX LLP-8 SDA08AG Package Type ePSOP-8 NSC Package Drawing MRA08A Supplied As 95 Units in Anti-Static Rails 2,500 Units on Tape and Reel 95 Units in Anti-Static Rails 2500 Units on Tape and Reel 1,000 Units on Tape and Reel 4,500 Units on Tape and Reel 1,000 Units on Tape and Reel 4,500 Units on Tape and Reel
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DataSheet.in
LM3414/LM3414HV
Pin Descriptions
Pin(s) 1 2 3 4 5 6 7 8 EP Name VCC PGND IADJ GND FS DIM LX VIN EP Description Internal Regulator Output Pin Power Ground Pin Average Output Current Adjustment Pin Analog.