LM3445 Triac Dimmable Offline LED Driver February 10, 2009 LM3445 www.
DataSheet4U.
com Triac Dimmable Offline LED Driver General Description 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.
The LM3445 includes a bleeder circuit to ensure proper triac operation by allowing current flow while the line voltage is low to enable prope...

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