Using the LM3447-PAR-230VEVM User's Guide Literature Number: SLUUA02 AUGUST 2012
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User's Guide SLUUA02 – AUGUST 2012 LM3447-PAR-230VEVM is a Phase-Dimmable, PrimarySide Regulated LED Driver 1 Introduction The LM3447-PAR-230VEVM is a 16-W, 230-VAC isolated dimmable LED driver with form-factors intended for BR and PAR applications. 2 Description The LM3447-PAR-230VEVM is a primary-side power regulated PFC controller used for commercial and residential phase-cut dimmer compatible LED lamp drivers.
Electrical Performance Specifications 3 www.ti.com Electrical Performance Specifications Table 1.
Schematic www.ti.com 4 Schematic Figure 1.
Test Setup www.ti.com 5 Test Setup 5.1 Test Equipment Voltage Source: 180 VRMS to 270 VRMS isolated AC source Agilent 6812B Multimeters: Agilent 34410A Power Meter: WT210 Digital Power Meter (Voltech) Output Load: 10 LEDs in series (VF = 3.2 V at 350 mA per LED) Oscilloscope: DPO4054 (TEKTRONIX) Operating Temperature: 25°C Recommended Wire Gauge: 18 AWG not more than two feet long 5.2 Recommended Test Setup AMP Meter 1 Volt Meter 1 LED Load AC Source AMP Meter 2 Dimmer Min Max Figure 2.
Test Procedure www.ti.com 6 Test Procedure 6.1 Line/Load Regulation and Efficiency Measurement Procedure 1. 2. 3. 4. Connect EVM per Figure 2. An external LED load must be used to start up the EVM. Prior to turning on the AC source, set the voltage to 180 VRMS. Turn on the AC source. Record the output voltage from Voltmeter 2 and output current reading from Ammeter 2 and input current from Ammeter 1. 5. Increase output voltage by 5 VRMS. 6. Repeat steps 4 and 5 until 265 VAC is reached. 7.
EVM Assembly Drawing and PCB Layout 7 www.ti.com EVM Assembly Drawing and PCB Layout The following figures (Figure 3 through Figure 6) show the design of the LM3447-PAR-230VEVM printed circuit board. Figure 3. LM3447-PAR-230VEVM Top Layer Copper (top view) Figure 4. LM3447-PAR-230VEVM Bottom Layer Copper (bottom view) Figure 5.
EVM Assembly Drawing and PCB Layout www.ti.com Figure 6.
Performance Data and Typical Characteristic Curves 8 www.ti.com Performance Data and Typical Characteristic Curves Figure 7 through Figure 30 present typical performance curves for LM3447-PAR-230VEVM. 8.1 Efficiency 90.0% 89.0% 88.0% Efficiency (%) 87.0% 86.0% 85.0% 84.0% 83.0% 82.0% 81.0% 80.0% 180 190 200 210 220 230 240 Input Voltage (VRMS) 250 260 270 C002 Figure 7. LM3447-PAR-230VEVM Efficiency 8.2 Power Factor 0.99 0.98 Power Factor 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.
Performance Data and Typical Characteristic Curves www.ti.com 600 580 LED Current (mA) 560 540 520 500 480 460 440 420 400 180 190 200 210 220 230 240 Input Voltage (VRMS) 250 260 270 C001 Figure 10. LM3447-PAR-230VEVM LED Current Regulation 8.4 Input Current THD 10 9 Current THD (%) 8 7 6 5 4 3 2 1 0 180 190 200 210 220 230 240 Input Voltage (VRMS) 250 260 270 C003 Figure 11. LM3447-PAR-230VEVM- Current THD % vs Line Voltage 8.5 Output Ripple Figure 12.
Performance Data and Typical Characteristic Curves 8.6 www.ti.com Switch Node Voltage Valley Switching Figure 13. Switch Node Waveform (Ch1 - switch node (100V/div); Ch2 - rectified line voltage (100V/div)) 8.7 Current Sense Waveform Figure 14.
Performance Data and Typical Characteristic Curves www.ti.com 8.8 LED Open Circuit Protection Figure 15. Pre-Open Circuit Waveforms (Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div)) Figure 16. Open Circuit Steady State Waveforms (Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div)) Figure 17.
Performance Data and Typical Characteristic Curves 8.9 www.ti.com LED Short Circuit Protection Figure 18. Pre-Short Circuit Waveforms (Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div)) Figure 19. Short Circuit Steady State Waveforms (Ch1 - LED voltage (10V/div); Ch3 - line current (100mA/div); Ch4 - LED current(200mA/div)) Figure 20.
Performance Data and Typical Characteristic Curves www.ti.com 8.10 Dimming Characteristics with Reverse Phase Dimmer 600 LED Current (mA) 500 400 300 200 100 0 0.0 50.0 100.0 150.0 Input Voltage (VRMS) 200.0 250.0 C004 Figure 21. LED Current vs Conduction Angle Figure 22. Dimmer at maximum brightness setting (Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div)) Figure 23.
Performance Data and Typical Characteristic Curves www.ti.com Figure 24. Dimmer at minimum brightness setting (Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div)) 8.11 Dimming Characteristics with Forward Phase Dimmer 600 LED Current (mA) 500 400 300 200 100 0 0 50 100 150 Input Voltage (VRMS) 200 250 C005 Figure 25. LED Current vs Input Voltage Figure 26.
www.ti.com Performance Data and Typical Characteristic Curves Figure 27. Dimmer at half brightness setting (Ch1 - rectified line voltage (100V/div); Ch3 - line current (100mA/div); Ch4- LED current (100 mA/div)) Figure 28.
Performance Data and Typical Characteristic Curves www.ti.com 8.12 EMI Plot Ref 100 dBµV * Att 10 dB * RBW 9 kHz * VBW 30 kHz * SWT 1 s 1 MHz 100 10 MHz A 90 1 PK MAXH 80 TDF 70 FCC15QPK 60 FCC15AVG 50 6DB 40 30 20 10 0 Start 150 kHz Stop 30 MHz Figure 29. Peak EMI Scan Ref 100 dBµV * Att 10 dB * RBW 9 kHz * VBW 10 Hz SWT 340 s 1 MHz 100 10 MHz A 90 SGL 1 AV * CLRWR 80 TDF 70 FCC15QPK 60 FCC15AVG 50 6DB 40 30 20 10 0 Center 2.121320344 MHz Span 29.
Performance Data and Typical Characteristic Curves www.ti.com 8.13 Thermal Performance Figure 31. LM3447-PAR-230VEVM Thermal Image (top view) Figure 32.
Transformer Specification 9 www.ti.com Transformer Specification Figure 33.
List of Materials www.ti.com 10 List of Materials The EVM components list according to the schematic shown in Figure 1. Table 3. LM3447-PAR-230VEVM List of Materials QTY REF DES DESCRIPTION MANUFACTURER PARTNUMBER 1 U1 Phase-dimmable, primary-side power regulated, PFC flyback controller for LED Lighting 1 C1 Capacitor, Ceramic, 2200 pF, 250 V, 20%, Radial TDK Corporation CD12-E2GA222MYNS 2 C3, C5 Capacitor, Film, 0.
List of Materials 22 www.ti.
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