LM3445 TRIAC Dimmable LED Driver

Texas Instruments' TRIAC dimmable offline LED driver solution is perfect for any application where an LED driver must interface to a standard TRIAC wall dimmer. The TRIAC dimmable LED driver delivers a wide and uniform dimming range that is free of flicker with best-in-class dimming performance, and high efficiency—all while maintaining ENERGY STAR® power factor requirements in a typical application. Conventional TRIAC dimmers are designed to interface to a resistive load (halogen or incandescent bulbs). Since the LEDs do not appear to be a resistive load, dimming LEDs from a standard TRIAC wall dimmer is a challenge. The LM3445 LED driver enables a direct replacement of incandescent lamp systems that are currently interfaced to a TRIAC dimmer without having to change the original infrastructure or sacrifice performance.

Full range dimming capability offers 100:1 full range dimming capability, going from full light to nearly imperceptible light in a continuous range without being extinguished and maintaining a constant current to large strings of LEDs driven in series off a standard line voltage.

Easy of use enables a direct replacement of incandescent or halogen lamp systems that are currently interfaced to a TRIAC dimmer without having to change the original infrastructure or sacrifice performance. In addition, the online design tools allow for easy and quick design-in.

Uniform dimming allows master-slave operation control in multichip solutions, enabling a single TRIAC dimmer to control multiple strings of LEDs with smooth, consistent dimming free of flicker.

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