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
Turn-on angle vs. Iout
0
50
100
150
200
250
300
5 25 45 65 85 105 125 145 165
Turn-on angle (degrees)
Iout (mA)
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Performance Data and Typical Characteristic Curves
7.6 Switch Node Voltage Valley Switching
Figure 9. Switch Node Waveform
(Ch1 - LED current Ch2- switch node Ch3 - rectified line voltage)
7.7 Triac Dimmer LED Current vs Conduction Angle
Figure 10. LED Current vs Conduction Angle
11
SLUU937–May 2012 LM3447-A19-120VEVM is a Phase-Dimmable, Primary-Side Regulated LED
Driver
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