LM3444MM

• Product introduction

peculiarity

Application voltage range 80V AC - 277V AC
Able to control LED current greater than 1A
Adjustable switching frequency
Low quiescent current
Adaptively programmable off-time allows constant ripple current
Thermal shutdown
No 120Hz flicker
Low profile 10-pin MSOP package
Patent-pending drive architecture

illustrate

The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for lighting high power LEDs. High-frequency capability architecture that allows the use of small external passive components. The passive PFC circuit ensures good power factor, plots directly from the current cycle line, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limiting, and VCC undervoltage lockout. The LM3444 is a low-profile MSOP-10 package.

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Solid-state lighting
Industrial and commercial lighting
Residential lighting