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100W/4Ω x 2 Channel Class D Audio Power Amplifier
International Rectifier suggests the following guidelines for safe operation and
handling of IRAUDAMP19 Demo board;
Always wear safety glasses whenever operating Demo Board
Avoid physical contact with exposed metal surfaces when operating Demo
Board
Turn off Demo Board when placing or removing measurement probes
www.irf.com
IRAUDAMP19
Using the IR4301
By
Jun Honda, Liwei Zheng
CAUTION:
IRAUDAMP19 REV 3.0
Page 1 of 14
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Summary of Contents for Infineon Technologies IRAUDAMP19
- Page 1 Using the IR4301 Jun Honda, Liwei Zheng CAUTION: International Rectifier suggests the following guidelines for safe operation and handling of IRAUDAMP19 Demo board; Always wear safety glasses whenever operating Demo Board Avoid physical contact with exposed metal surfaces when operating Demo Board ...
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Page 2: Table Of Contents
CONNECTION SETUP ..............4 TEST PROCEDURES ..............5 PERFORMANCE AND TEST GRAPHS .......... 5 THERMAL INFORMATION .............. 8 SCHEMATIC ..................9 BILL OF MATERIALS ..............10 PCB SPECIFICATIONS ..............12 REVISION CHANGES DESCRIPTIONS ........14 www.irf.com Page 2 of 14 IRAUDAMP19 REV 3.0... -
Page 3: Introduction
Introduction The IRAUDAMP19 reference design is a two-channel, 100W/ch (4 Ω/52V Bus voltage) half-bridge Class D audio power amplifier with single power supply. This reference design demonstrates how to use the IR4301 IC with single power supply, implement protection circuits, and design an optimum PCB layout using PowIRaudio integrated Class D IC. -
Page 4: Connection Setup
Analog input for CH1 and CH2 POWER Single supply CH1 OUT Output for CH1 CH2 OUT Output for CH2 *IRAUDAMP19 can be powered by 30V-41V supply with modifications of power resistors and UVP zener as below. Power supply voltage 41-52V 30-41V R25~R28,R56,R57,R 64,R65 560 ohm 390 ohm www.irf.com... -
Page 5: Test Procedures
Load Impedance = 4 ohms 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m 500m Sweep Trace Color Line Style Thick Data Axis Comment Solid Anlr.THD+N Ratio Left Blue Solid Anlr.THD+N Ratio Left Amp19.at27 Fig 2 www.irf.com Page 5 of 14 IRAUDAMP19 REV 3.0... -
Page 6: Frequency Response
Load Impedance = 4 ohms No Input Signal -100 -110 -120 -130 -140 -150 Sweep Trace Color Line Style Thick Data Axis Comment Solid Fft.Ch.1 Ampl Left Blue Solid Fft.Ch.2 Ampl Left Amp19FTT,Flloor noise.at27 Fig 4 www.irf.com Page 6 of 14 IRAUDAMP19 REV 3.0... - Page 7 Noise Floor with 1Vrms Output Test Conditions: VBus = 52V Output = 1Vrms @ 1 KHz Load Impedance = 4 ohms -100 -110 Fig 5 www.irf.com Page 7 of 14 IRAUDAMP19 REV 3.0...
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Page 8: Thermal Information
1/8 Po Thermal Test Conditions: Tamb=25°C natural convection cooling Both Channel Driven 1/8Po continuous 30mins Temperature measured by infrared camera Fig 6 IRAUDAMP19 (Vbus=52V) IR4301’s temperature saturated around 80°C within 30minutes www.irf.com Page 8 of 14 IRAUDAMP19 REV 3.0... -
Page 9: Schematic
Schematic Fig7 www.irf.com Page 9 of 14 IRAUDAMP19 REV 3.0... -
Page 10: Bill Of Materials
RES 47K OHM 1/10W 5% 0603 RHM47KGCT-ND R9, R10 Digikey RES 3.01K OHM 1/8W 1% 0805 RHM3.01KCRCT-ND R11, R12, R13, R14 Digikey RMCF0805FT68K1CT- RES 68.1K OHM 1/8W 1% 0805 R15, R16, R17, R18 Digikey www.irf.com Page 10 of 14 IRAUDAMP19 REV 3.0... - Page 11 Digikey DIODE ZENER 36V 500MW BZT52C36-FDICT-ND SOD123 Digikey *BOM is for 41V-52V power supply IRAUDAMP19 can be powered by 30V-41V supply with modifications of power resistors and UVP zener as below. Power supply voltage 41-52V 30-41V R25~R28,R56,R57,R 64,R65 560 ohm 390 ohm www.irf.com...
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Page 12: Pcb Specifications
8. All exposed copper must finished with TIN-LEAD Sn 60 or 63 for 100u inches thick. 9. Tolerance of PCB size shall be 0.010 –0.000 inches 10. Tolerance of all Holes is -.000 + 0.003” 11. PCB acceptance criteria as defined for class II PCB’S standards. www.irf.com Page 12 of 14 IRAUDAMP19 REV 3.0... - Page 13 PCB Layout Top side: Fig 8 Bottom side: Fig 9 Note: Refer to AN1170 for footprint and board mounting details. www.irf.com Page 13 of 14 IRAUDAMP19 REV 3.0...
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Page 14: Revision Changes Descriptions
Housekeeping’s power resistors have been October,24 2014 changed from 1.2kohm to 560ohm WORLD HEADQUARTERS: 101 N. Sepulveda Blvd., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 05/16/2012 www.irf.com Page 14 of 14 IRAUDAMP19 REV 3.0... - Page 15 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: International Rectifier IRAUDAMP19...