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LM3450A Datasheet Led Drivers

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM3450 LM3450A LED Drivers with Active Power Factor Correction and Phase Dimming Decoder LM3450 LM3450A June 20, 2011 LED Drivers with Active Power Factor Correction and Phase Dimming Decoder.

This datasheet includes multiple variants, all published together in a single manufacturer document.

General Description

The LM3450/50A is a power factor controller (PFC) with separate phase dimming decoder.

The PFC regulates the output voltage while maintaining excellent power factor.

The phase dimming decoder interprets the phase angle and remaps it to a 500Hz PWM output.

Key Features

  • The input-output mapping is programmable for design flexibility, while a dynamic filter and variable sampling rate provide smooth uniform dimming. A dynamic hold circuit ensures that the phase dimmer angle is decoded properly while minimizing extra power loss. The LM3450A is identical to the LM3450 with the exception of one circuit operation. The dynamic hold current is sampled in the LM3450 while it continuously operates in the LM3450A. This difference between the two devices defines the suita.

Similar Datasheet

Brand Logo Part Number Description Manufacturer
Texas Instruments Logo LM3450 LED Drivers Texas Instruments

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