Using the LM3447-A19-120VEVM User's Guide Literature Number: SLUU937 May 2012
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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-VAC 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.
Electrical Performance Specifications 3 www.ti.com Electrical Performance Specifications Table 1.
SLUU937 – May 2012 Submit Documentation Feedback J3 J1 22 R1 Copyright © 2012, Texas Instruments Incorporated SC1 SC2 SC3 SC4 1 Not Notes: populated 0.1uF 118k C11 R13 C10 0.1uF 3.3mH L2 R16 1 C4 33nF C2, C4: 305Vac, X2 class R1: Fusible Resistor C2 10nF 3.3mH R15 1 EMI Filter and Snubber Circuit L1 Hardware and Fiducials J5 250VAC, 2A F1 MOV1 140VAC, 12J J4 10uF C12 R12 280k RT1 100k C3 0.
Test Setup www.ti.com 5 Test Setup 5.1 Test Equipment Voltage Source: 105 VRMS to 135 VRMS isolated AC source PCR500LA (KIKUSUI) Multimeters: Agilent 34401A Power Meter: PM1000 Digital Power Meter (Voltech) Output Load: 9 LEDs in series (VF = 3.2 V at 350 mA per LED) Oscilloscope: TDS3045C (TEKTRONIX) Operating Temperature: 25°C Recommended Wire Gauge: 18 AWG not more than two feet long 5.2 Recommended Test Setup Figure 2. LM3447-A19-120VEVM Recommended Test Set Up 5.3 List of Test Points Table 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 above. An external LED load must be used to start up the EVM. Prior to turning on the AC source, set the voltage to 90 VRMS. Turn on the AC source. Record the output voltage and current readings from Voltmeter 2 and output current reading from Ammeter 2 and input voltage reading from Voltmeter 1 and current from Ammeter 1. 5. Increase output voltage by 5 VRMS.
Performance Data and Typical Characteristic Curves 7 www.ti.com Performance Data and Typical Characteristic Curves Figure 3 through Figure 26 present typical performance curves for LM3447-A19-120VEVM. 7.1 Efficiency Efficiency vs Line Voltage 89.00 Efficiency (%) 87.00 85.00 83.00 81.00 79.00 77.00 75.00 90 100 110 120 130 140 Input voltage (VAC) Figure 3. LM3447-A19-120VEVM Efficiency 7.2 Power Factor Input voltage vs. PF 1 Power Factor 0.99 0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.
Performance Data and Typical Characteristic Curves www.ti.com 7.3 Line Regulation Line Regulation 15 Input Power (W) 14 13 12 11 10 9 8 7 6 5 90 100 110 120 130 140 Input voltage (VAC) Figure 5. LM3447-A19-120VEVM Input Power Regulation Line Regulation Output current (mA) 325 315 305 295 285 275 265 255 245 235 225 90 100 110 120 130 140 Input voltage (VAC) Figure 6.
Performance Data and Typical Characteristic Curves 7.4 www.ti.com Input Current THD Ithd% vs. Input voltage 15 14 13 Ithd%) 12 11 10 9 8 7 6 5 90 100 110 120 130 140 Input Voltage (VAC) Figure 7. LM3447-A19-120VEVM- Ithd % vs Line Voltage 7.5 Output Ripple Figure 8.
Performance Data and Typical Characteristic Curves www.ti.com 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 Turn-on angle vs. Iout 300 250 Iout (mA) 200 150 100 50 0 5 25 45 65 85 105 125 145 165 Turn-on angle (degrees) Figure 10.
Performance Data and Typical Characteristic Curves 7.8 www.ti.com Turn-On Angle vs Input Power Turn-on angle vs. Total Input Power Total Input Power (W) 12.00 10.00 8.00 6.00 4.00 2.00 0.00 5 55 105 155 Turn-on angle (degrees) Figure 11. Turn-On Angle vs. Input Power 7.9 Input/Output Current and Line Voltage Waveforms vs. Dimmer Setting Figure 12.
Performance Data and Typical Characteristic Curves www.ti.com Figure 13. Dimmer 8 ms (Ch4- LED current Ch3 - rectified line voltage Ch1 – line current) Figure 14.
Performance Data and Typical Characteristic Curves www.ti.com Figure 15. Dimmer 6 ms (Ch4- LED current Ch3 - rectified line voltage Ch1 – line current) Figure 16.
Performance Data and Typical Characteristic Curves www.ti.com Figure 17. Dimmer 4 ms (Ch4- LED current Ch3 - rectified line voltage Ch1 – line current) Figure 18.
Performance Data and Typical Characteristic Curves www.ti.com Figure 19. Dimmer 2.0 ms (Ch4- LED current Ch3 - rectified line voltage Ch1 – line current) 7.10 Current Sense Waveform Figure 20.
Performance Data and Typical Characteristic Curves www.ti.com 7.11 LED Open and Short Circuit Waveforms Figure 21. Pre-Open Circuit Waveforms (Ch4- LED current Ch2- LED voltage Ch1 – line current) Figure 22.
Performance Data and Typical Characteristic Curves www.ti.com Figure 23. Open Circuit Waveforms (Ch4- LED current Ch2 - line voltage Ch1 – line current) Figure 24.
Performance Data and Typical Characteristic Curves www.ti.com Figure 25. Short Circuit Waveforms (Ch4- LED current Ch2 - rectified line voltage Ch1 – line current) Figure 26.
Performance Data and Typical Characteristic Curves www.ti.com 7.12 EMI Plot Figure 27.
Performance Data and Typical Characteristic Curves www.ti.com 7.13 Transformer Specification PRI 127 - 191VDC 70kHz SEC 30VDC, 280mADC AUX 15VDC, 20mADC ELECTRICAL SPECIFICATIONS @ 25°C unless otherwise noted: D.C. RESISTANCE (@20°C ): -1 3 , 2.90 Ohms ±10%. 5-4 , 0.320 Ohms ±10%. 7-6 , 0.345 Ohms ±10%. DIELECTRIC RATING: 000VAC, 3 1 minute tested by applying 3750VAC for 1 second between pins 3-7(tie 1+5). INDUCTANCE: .30mH ±10%, 70kHz, 1 100mVAC, 0mADC, 3-1, Ls.
EVM Assembly Drawing and PCB Layout 8 www.ti.com EVM Assembly Drawing and PCB Layout The following figures (Figure 29 through Figure 32) show the design of the LM3447EVM-128 printed circuit board. Figure 29. LM3447-A19-120VEVM Top Layer Copper (top view) Figure 30.
EVM Assembly Drawing and PCB Layout www.ti.com Figure 31. LM3447-A19-120VEVM Top Assembly Drawing (top view) Figure 32.
List of Materials 9 www.ti.com List of Materials The EVM components list according to the schematic shown in Figure 1. Table 3. LM3447-A19-120VEVM List of Materials QTY DESCRIPTION MFR PART NUMBER C10,C11 Capacitor ceramic, 0.1 µF, 16 V, 603 STD STD 1 C12 Capacitor ceramic, 10 µF, 6.3 V, 805 STD STD 1 C6 Capacitor ceramic, 1.
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EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods.
FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
【Important Notice for Users of this Product in Japan】 】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. 2. 3. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.
EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments. Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use.
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