LM3414/HV 1-A, 60-W Common Anode-Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor
1 Features
- Supports LED Power up to 60 W (1): 18x 3-W 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 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
2 Applications
- High Power LED Drivers
- Architectural Lighting, Office Troffers
- Automotive Lighting
- MR-16 LED Lamps
3 Description
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.
Device Information(2)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM3414, LM3414HV |
WSON (8) | 3.00 mm × 3.00 mm |
| SOIC (8) | 3.90 mm × 4.89 mm |
- Thermal derating applies according to actual operation conditions.
- For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Application Schematic
4 Revision History
Changes from E Revision (May 2013) to F Revision
- Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section.Go
- Removed soldering information.Go
Changes from D Revision (April 2013) to E Revision
- Changed layout of National Data Sheet to TI formatGo
