LM3414HVMR

Product Summary

The LM3414HVMR is a 1A 60w* common anode capable constant current buck led driver which requires no external current sensing resistor. It is 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 240Hz 256-step dimming resolution requirement for general lighting. The LM3414HVMR can be applied in high power led driver, architectural lighting, office troffer, automotive lighting, and mr-16 led lamp.

Parametrics

LM3414HVMR absolute maximum ratings: (1)VIN to GND: -0.3V to 42V; (2)VIN to GND (Transient): 45V (500 ms); (3)LX to PGND: -0.3V to 42V; (4)LX to PGND (Transient): -3V(2 ns) to 45V (500 ms); (5)FS, IADJ to GND: -0.3V to 5V; (6)DIM to GND: -0.3V to 6V; (7)ESD Rating; (8)Human Body Model (Note 2): 2kV; (9)Storage Temp. Range: -65°C to 125°C; (10)Lead Temp. (Soldering 10s): 260°C.

Features

LM3414HVMR features: (1)Support LED power up to 60W*: 18x 3W HBLEDs; (2)Requires NO external current sensing resistor; (3)±3% LED current accuracy; (4)Up to 96% efficiency; (5)High contrast ratio (Minimum dimming current pulse width; (6)<10μS); (7)Integrated low-side N-channel MOSFET; (8)Adjustable Constant LED current from 350mA to 1000mA; (9)Support analog dimming and thermal fold-back; (10)Wide input voltage range: 4.5V to 42V (LM3414)-4.5V to 65V (LM3414HV); (11)Constant Switching Frequency adjustable from 250 kHz to 1000 kHz; (12)Thermal shutdown protection; (13)Power enhanced ePSOP-8 or 3mm x 3mm LLP-8 package.

Diagrams