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LM3450 - LED Drivers

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

  • 1.
  • 2 Critical Conduction Mode PFC.
  • Over-Voltage Protection.
  • Feedback Short Circuit Protection.
  • 70:1 PWM Decoded From Phase Dimmer.
  • Analog Dimming.
  • Programmable Dimming Range.
  • Digital Angle and Dimmer Detection.
  • Dynamic Holding Current.
  • Smooth Dimming Transitions.
  • Low Power Operation.
  • Start-Up Pre-Regulator Bias.
  • Precision Voltage Reference.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM3450 www.ti.com SNVS681D – NOVEMBER 2010 – REVISED MAY 2013 LED Drivers with Active Power Factor Correction and Phase Dimming Decoder Check for Samples: LM3450 FEATURES 1 •2 Critical Conduction Mode PFC • Over-Voltage Protection • Feedback Short Circuit Protection • 70:1 PWM Decoded From Phase Dimmer • Analog Dimming • Programmable Dimming Range • Digital Angle and Dimmer Detection • Dynamic Holding Current • Smooth Dimming Transitions • Low Power Operation • Start-Up Pre-Regulator Bias • Precision Voltage Reference APPLICATIONS • Dimmable Downlights, Troffers, and Lowbays • Large Form Factor Bulbs • Indoor and Outdoor Area SSL • Power Supply PFC DESCRIPTION The LM3450/50A is a power factor controller (PFC) with separate phase dimming decoder.