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35W/4Ω x 2 Channel Class D Audio Power Amplifier
International Rectifier suggests the following guidelines for safe operation and
handling of IRAUDAMP15 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
IRAUDAMP15
Using the IR4311
By
Jun Honda, Liwei Zheng
CAUTION:
IRAUDAMP15 REV
Page 1 of 13
1.0
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Summary of Contents for Infineon Technologies IRAUDAMP15
- Page 1 Using the IR4311 Jun Honda, Liwei Zheng CAUTION: International Rectifier suggests the following guidelines for safe operation and handling of IRAUDAMP15 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
TABLE OF CONTENTS ......PAGE INTRODUCTION................3 SPECIFICATIONS ................3 CONNECTION SETUP ..............4 TEST PROCEDURES..............5 PERFORMANCE AND TEST GRAPHS ..........5 THERMAL INFORMATION..............8 SCHEMATIC ..................9 BILL OF MATERIALS ..............10 PCB SPECIFICATIONS..............11 REVISION CHANGES DESCRIPTIONS ........13 www.irf.com Page 2 of 13 IRAUDAMP15 REV... -
Page 3: Introduction
Introduction The IRAUDAMP15 reference design is a two-channel, 35W/ch half-bridge Class D audio power amplifier with single power supply. This reference design demonstrates how to use the IR4311 IC with single power supply, implement protection circuits, and design an optimum PCB layout using PowIRaudio integrated Class D IC. -
Page 4: Connection Setup
Audio Input Audio Signal Generator Fig 1 Typical Test Setup Connector Description Audio IN Analog input for CH1 and CH2 POWER Single supply CH1 OUT Output for CH1 CH2 OUT Output for CH2 www.irf.com Page 4 of 13 IRAUDAMP15 REV... -
Page 5: Test Procedures
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 Ch1 4ohms 31V Blue Solid Anlr.THD+N Ratio Left Ch2 4ohms 31V Fig 2 www.irf.com Page 5 of 13 IRAUDAMP15 REV... -
Page 6: Frequency Response
VBus = 31V Load Impedance = 4 ohms No Input Signal -100 -120 -140 Sweep Trace Color Line Style Thick Data Axis Comment Solid Fft.Ch.1 Ampl Left Blue Solid Fft.Ch.2 Ampl Left Fig 4 www.irf.com Page 6 of 13 IRAUDAMP15 REV... - Page 7 Axis Comment Solid Fft.Ch.1 Ampl Left Ch1 4ohm Blue Solid Fft.Ch.2 Ampl Left Ch1 4ohm Fig 5 Efficiency 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 0.0% Power (W) Fig 6 www.irf.com Page 7 of 13 IRAUDAMP15 REV...
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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 7 IRAUDAMP15 (Vbus=31V) IR4311’s temperature saturated around 85°C within 30minutes www.irf.com Page 8 of 13 IRAUDAMP15 REV... -
Page 9: Schematic
Schematic Fig8 www.irf.com Page 9 of 13 IRAUDAMP15 REV... -
Page 10: Bill Of Materials
RES 10 OHM 1/8W 5% 0805 SMD Digikey RMCF0603JT5K10CT-ND RES 5.1K OHM 1/10W 5% 0603 SMD Digikey SWITCH TOGGLE SPDT .4VA SEAL 360-1758-ND Digikey IR4311 U1, U2 2 CH PowIRaudio integrated Class D IC www.irf.com Page 10 of 13 IRAUDAMP15 REV... -
Page 11: 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 11 of 13 IRAUDAMP15 REV... - Page 12 PCB Layout Top side: Fig 9 Bottom side: Fig 10 Note: Refer to AN1170 for footprint and board mounting details. www.irf.com Page 12 of 13 IRAUDAMP15 REV...
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Page 13: Revision Changes Descriptions
Revision changes descriptions Revision Changes description Date Rev 1.0 Released May, 11 2012 WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 Data and specifications subject to change without notice. 01/29/2009 www.irf.com Page 13 of 13 IRAUDAMP15 REV...
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