LM3414HVSD

TEXAS INSTRUMENTS  LM3414HVSD  发光二极管驱动器, 1输出, 降压, 恒流, 4.5V-65V输入, 500kHz开关, 1A输出, WSON-8

The 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.

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Requires no external current sensing resistor

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Up to 96% efficiency

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High contrast ratio minimum dimming current pulse width <10µs

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Integrated low-side N-channel MOSFET

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Adjustable constant LED current from 350 to 1000mA

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Support analogue dimming and thermal fold-back

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Thermal shutdown protection

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Supports LED power up to 60W - 18x 3W HBLEDs

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±3% LED current accuracy

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Green product and no Sb/Br