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LM3445 - Triac Dimmable Offline LED Driver

Datasheet Summary

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.

Features

  • include thermal shutdown, current limit and V CC under-voltage lockout. Features.
  • Triac dim decoder circuit for LED dimming.

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Datasheet preview – LM3445

Datasheet Details

Part number LM3445
Manufacturer National Semiconductor
File Size 1.06 MB
Description Triac Dimmable Offline LED Driver
Datasheet download datasheet LM3445 Datasheet
Additional preview pages of the LM3445 datasheet.

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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 proper firing of the triac.
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