Infineon Technologies IRAUDAMP15 Reference Design

IRAUDAMP15 REV 1.0 IRAUDAMP15 35W/4Ω x 2 Channel Class D Audio Power Amplifier Using the IR4311 By 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 physica ...

IRAUDAMP15 REV 1.0 TABLE OF CONTENTS........................... PAGE INTRODUCTION..............................................................................3 SPECIFICATIONS ...........................................................................3 CONNECTION SETUP........................................................... ...

IRAUDAMP15 REV 1.0 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 integ ...

IRAUDAMP15 REV 1.0 Connection Setup Fig 1 Typical Test Setup Connector Description Audio IN CN1 Analog input for CH1 and CH2 POWER P2 Single supply CH1 OUT P1 Output for CH1 CH2 OUT P3 Output for CH2 100W, Non-inductive Resistors CN1 P1 P3 P2 CH1 Output CH2 Output Audio Input 18-31V, 3A DC supply 4 Ohm 4 Ohm Audio Signal ...

IRAUDAMP15 REV 1.0 Test Procedures Test Setup: 1. Connect 4, 100W load to both output connectors, P1 and P3 and audio analyzer (Ap). 2. Connect Audio Signal Generator to CN1 for CH1 and CH2 respectively (Ap). 3. Connect a single power supply to P2 pre-adjusted to 18-31V as shown on Figure above 4. Turn on the power supply. ...

IRAUDAMP15 REV 1.0 Frequency Response Test Conditions: VBus = 31V Set Output = 1V Load Impedance = 4 ohms Color Sweep Trace Line Style Thick Data Axis Comment 1 1 Red Solid 2 Anlr.Level A Left Ch1 4ohm SP 25V 1 2 Blue Solid 2 Anlr.Level B Left Ch2 4ohm SP 25V -10 +4 -8 -6 -4 -2 +0 +2 d B r A 20 200k 50 100 200 500 1k 2k 5k 10k ...

IRAUDAMP15 REV 1.0 Noise Floor with 1Vrms Output Test Conditions: VBus = 31V Output = 1Vrms @ 1 KHz Load Impedance = 4 ohms Color Sweep Trace Line Style Thick Data Axis Comment 1 1 Red Solid 2 Fft.Ch.1 Ampl Left Ch1 4ohm 1 2 Blue Solid 2 Fft.Ch.2 Ampl Left Ch1 4ohm -100 +0 -80 -60 -40 -20 d B V 10 20k 20 50 100 200 500 1k 2k 5k ...

IRAUDAMP15 REV 1.0 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 ...

IRAUDAMP15 REV 1.0 Schematic Fig8 D1 R9 1k +B GND SD VCC R31 4.7R IN+ 3 GND 2 VAA 1 VB 13 VP 12 COMP 5 VN 10 VS 11 VCC 8 CSD 6 IN- 4 VSS 7 COM 9 CSH 14 O 15 U1 PQFN C15 1nF 18-31V Bus +5V -5V Audio Gnd 1 SD C21 10uF 0.1uF C23 Class D, AMP15 Schematic SCH_IR4311_Single Supply Rev2.4 C6 2.2nF,50V C13 2.2nF,50V C7 22uF, 16V C17 4. ...

IRAUDAMP15 REV 1.0 Bill of Materials No Part Number Designator Description Quantity Vender 1 490-1494-1-ND C1, C2, C3, C4, C15, C16 CAP CER 1000PF 50V 10% X7R 0603 6 Digikey 2 445-1309-1-ND C5, C6, C8, C9, C11, C12, C13, C14 CAP CER 2200PF 50V X7R 10% 0603 8 Digikey 3 587-1433-1-ND C7, C10 CAP CER 22UF 16V X5R 1206 2 Digikey 4 ...

IRAUDAMP15 REV 1.0 46 DDZ5V1BDICT-ND Z1, Z2, Z3, Z4 DIODE ZENER 5.1V 500MW SOD-123 4 Digikey 47 BZT52C11-FDICT-ND Z5 DIODE ZENER 11V 500MW SOD123 1 Digikey 48 568-3766-1-ND Z7 DIODE ZENER 33V 375MW SOD123F 1 Digikey 49 BZT52C16-FDICT-ND Z8 DIODE ZENER 16V 500MW SOD-123 1 Digikey PCB Specifications PCB: 1. Two Layers SMT PCB wi ...

IRAUDAMP15 REV 1.0 PCB Layout Top side: Fig 9 Bottom side: Note: Refer to AN1170 for footprint and board mounting details. Fig 10 ...

IRAUDAMP15 REV 1.0 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 ...