LM3414MR/NOPB .

The LM3414MR/NOPB is a common anode capable constant current buck LED Driver for driving single string of 3W HBLED with up to 96% efficiency. It accepts input voltage from 4.5 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 small-signal resistor to ground provides very fine LED current adjustment, analogue 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 240Hz 256-step dimming resolution requirement for general lighting.

• Requires no external current sensing resistor
• Up to 96% efficiency
• High contrast ratio (minimum dimming current pulse width <lt/>10µs)
• Integrated low-side N-channel MOSFET
• Adjustable constant LED current from 350 to 1000mA
• Support analogue dimming and thermal fold-back
• Thermal shutdown protection
• Supports LED power up to 60W - 18x 3W HBLEDs
• ±3% LED current accuracy
• Green product and no Sb/Br

Applications

LED Lighting, Lighting, Automotive