Datasheet

User's Guide

SLUU978–June 2012

LM3447-A19-230VEVM is a Phase-Dimmable, Primary-Side

Regulated LED Driver

1 Introduction

The LM3447-A19-230VEVM is a 10-W, 230-V

isolated dimmable LED driver whose form factor intended

for A19 and R27 applications.

2 Description

The LM3447-A19-230VEVM is a primary-side power regulated PFC controller used for commercial and

residential phase-cut dimmer compatible LED lamp drivers. The LM3447-A19-230VEVM uses fixed

frequency valley switching operation resulting in discontinuous current operation.

2.1 Typical Applications

• A19 Bulb Form Factor

• R27 Bulb Form Factor

2.2 Features

• Primary-Side Control

• Leading and Trailing Edge Compatible

• 50:1 Dimming Range

• Valley Switching

• Fixed Frequency Discontinuous Operation

• Thermal Foldback

• PFC

• Efficient Triac Hold Current Operation

• LED Short and Open Circuit Detection

• Thermal Foldback

• Constant Power Operation

SLUU978–June 2012 LM3447-A19-230VEVM is a Phase-Dimmable, Primary-Side Regulated LED

Driver

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