National’s PowerWise LED drivers such as the LM34xx/LM340x/LM35xx families offer a maximum power-to-performance ratio, which means you get more features than standard incandescent and fluorescent lighting solutions at a fraction of the wattage. Using National’s PowerWise LED drivers, results in energy-efficient solutions that reduce power consumption.
The LM3445 is an adaptive constant off-time AC/DC buck (step-down) constant current controller designed to be compatible with triac dimmers. The LM3445 provides a constant current for illuminating high power LEDs and includes a triac dim decoder. The dim decoder allows wide range LED dimming using standard triac dimmers. The high frequency capable architecture allows the use of small external passive components.
Key Features
- Triac dim decoder circuit for LED dimming
- Application voltage range 80 VAC – 270 VAC
- Capable of controlling LED currents greater than 1A
- Adjustable switching frequency
- Low quiescent current
- Adaptive programmable off-time allows for constant ripple current
- Thermal shutdown
- No 120 Hz flicker
- Low profile 10 pin MSOP Package
- Patent pending drive architecture
Applications
- Retro Fit Triac Dimming
- Solid State Lighting
- Industrial and Commercial Lighting
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Residential Lighting