Datasheet
Table Of Contents
- Using the LM3447-A19-120VEVM
- 1 Introduction
- 2 Description
- 3 Electrical Performance Specifications
- 4 Schematic
- 5 Test Setup
- 6 Test Procedure
- 7 Performance Data and Typical Characteristic Curves
- 7.1 Efficiency
- 7.2 Power Factor
- 7.3 Line Regulation
- 7.4 Input Current THD
- 7.5 Output Ripple
- 7.6 Switch Node Voltage Valley Switching
- 7.7 Triac Dimmer LED Current vs Conduction Angle
- 7.8 Turn-On Angle vs Input Power
- 7.9 Input/Output Current and Line Voltage Waveforms vs. Dimmer Setting
- 7.10 Current Sense Waveform
- 7.11 LED Open and Short Circuit Waveforms
- 7.12 EMI Plot
- 7.13 Transformer Specification
- 8 EVM Assembly Drawing and PCB Layout
- 9 List of Materials
- Important Notices
User's Guide
SLUU937–May 2012
LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side
Regulated LED Driver
1 Introduction
The LM3447-A19-120VEVM is a 10-W, 120-V
AC
isolated dimmable LED driver whose form factor intended
for A19/R27 applications.
2 Description
The LM3447-A19-120VEVM is a primary-side power regulated PFC controller used for commercial and
residential phase-cut dimmer compatible LED lamp drivers. The LM3447-A19-120VEVM 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
3
SLUU937–May 2012 LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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