LM3444 Description
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs. The high-frequency capable architecture allows the use of small external passive ponents. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck...
LM3444 Key Features
- 1 Application Voltage Range: 80 VAC to 277 VAC
- Capable of Controlling LED Currents
- Adjustable Switching Frequency
- Low Quiescent Current
- Thermal Shutdown
- No Flicker at 120 Hz
- Low-Profile 10-Pin VSSOP Package
- Patented Drive Architecture