Infineon IRAUDAMP19 User manual

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IRAUDAMP19 REV 3.0

IRAUDAMP19

100W/4Ω x 2 Channel Class D Audio Power Amplifier

Using the IR4301

By

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

 Turn off Demo Board when placing or removing measurement probes

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IRAUDAMP19 REV 3.0

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 ................................................................. 12

REVISION CHANGES DESCRIPTIONS ....................................... 14

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IRAUDAMP19 REV 3.0

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. This reference design does not require

additional heatsink or fan cooling for normal operation (one-eighth of continuous rated power).The

reference design provides all the required housekeeping power supplies for ease of use. The two-

channel design is scalable for power and the number of channels.

Applications

 AV receivers

 Home theater systems

 Mini component stereos

 Powered speakers

 Sub-woofers

 Musical Instrument amplifiers

 Car audio amplifiers

Features

Output Power: 100W x 2 channels (10%THD+N 4Ω load; no heatsink)

Multiple Protection Features: Over-current protection (OCP), high side and low side

Over-voltage protection (OVP),

Under-voltage protection (UVP), high side and low side

Over-temperature protection (OTP)

PWM Modulator: Self-oscillating half-bridge topology

Specifications

General Test Conditions (unless otherwise noted) Notes / Conditions

Supply Voltages 41V~52V Without heatsink

Load Impedance 2-4Ω Resistive load

Self-Oscillating Frequency 400kHz No input signal, Adjustable

Gain Setting 24.8dB 1Vrms input yields rated power

Electrical Data Typical Notes / Conditions

IR Devices Used IR4301 PowIRaudio integrated Class D IC

Modulator Self-oscillating, second order sigma-delta modulation, analog input

Power Supply Range 41V~52V* Single power supply;

Output Power CH1-2: (1% THD+N) 82.5W 1kHz

Output Power CH1-2: (10% THD+N) 100W 1kHz

Rated Load Impedance 2-4Ω Resistive load

Idling Supply Current 67mA No input signal

Total Idle Power Consumption 3.5W No input signal

Distortion 0.02% THD+N @ 10W, 4Ω

Residual Noise 250



V IHF-A weighted, AES-17 filter

Efficiency 90% Single-channel driven, 100W, Class D

stage

*Can be powered by 30V-41V supply with modifications of power resistors and UVP zener.(Please refer Page4)

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IRAUDAMP19 REV 3.0

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

*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

Z5 36V 27V

250W, Non-inductive Resistors

CN1

P1 P3

P2

CH1

Output CH2

Output

Audio

Input

41-52V*, 3A DC supply

4 Ohm 4 Ohm

Audio Signal Generator

IR4301

SW1

SW1:PWM Shutdown/MUTE

Power

Indicator

FAULT

Indicator

FAULT

Indicator

IR4301

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IRAUDAMP19 REV 3.0

Test Procedures

Test Setup:

1. Connect 4, 250W 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 30-52V as shown on Figure above

4. Turn on the power supply.

5. Turn on SW1 (right side).

6. Blue LED (Normal) stays turning on after RED LED extinguished.

7. With an Oscilloscope, monitor switching waveform at VS of CH1 and CH2.

8. Quiescent current for the power supply should be 55mA 10mA at 52V.

Functionality Audio Tests:

9. Sweep the audio signal voltage from 15 mVRMS to 1.5 VRMS.

10. Monitor the output signals at P1/P3 with an oscilloscope. The waveform must be a non

distorted sinusoidal signal with input sinusoidal signal below 1Vrms.

Performance and Test Graphs

Power vs THD+N (without heatsink)

Test Conditions:

VBus = 52V

Input Signal=1 kHz

Load Impedance = 4 ohms

Amp19.at27

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Red Solid 3Anlr.THD+N Ratio Left

1 3 Blue Solid 3Anlr.THD+N Ratio Left

0.001

10

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

1

2

5

%

70m 200100m 200m 500m 1 2 5 10 20 50 100

W

Fig 2

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IRAUDAMP19 REV 3.0

Frequency Response

Test Conditions:

VBus = 52V

Set Output = 1W

Load Impedance = 4 ohms

Amp19FR.at27

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Red Solid 3Anlr.Level A Left

1 2 Blue Solid 3Anlr.Level B Left

-10

+4

-9

-8

-7

-6

-5

-4

-3

-2

-1

-0

+1

+2

+3

d

B

r

A

20 200k50 100 200 500 1k 2k 5k 10k 20k 50k 100k

Hz

Noise Floor

Test Conditions:

VBus = 52V

Load Impedance = 4 ohms

No Input Signal

Amp19FTT,Flloor noise.at27

ColorSweep Trace Line Style Thick Data Axi s Comment

1 1 Red Solid 3Fft.Ch.1 Ampl Left

1 2 Blue Solid 3Fft.Ch.2 Ampl Left

-150

+20

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

+0

+10

d

B

V

10 20k20 50 100 200 500 1k 2k 5k 10k

Hz

Fig 3

Fig 4

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IRAUDAMP19 REV 3.0

Noise Floor with 1Vrms Output

Test Conditions:

VBus = 52V

Output = 1Vrms @ 1 KHz

Load Impedance = 4 ohms

-110

+0

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

d

B

V

10 20k20 50 100 200 500 1k 2k 5k 10k

Hz

Fig 5

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IRAUDAMP19 REV 3.0

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 6 IRAUDAMP19 (Vbus=52V)

IR4301’s temperature saturated around 80°C within 30minutes

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IRAUDAMP19 REV 3.0

Schematic

Fig7

D1

+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

+5V

-5V

SD

C21

10uF

22uF

C23

Class D, AMP19 Schematic

SCH_IR4301_Single Supply Rev2.3

C6

2.2nF,50V

C13

2.2nF,50V

C7 22uF, 16V

C17

4.7uF,10V

C19

4.7uF,10V

D3

1N4148

R29

4.7R

R20 180R

-B

R51 10k, 1/2WR5210k, 1/2W

VS1

R49 2.2k

R4710, 1W

C35

0.47uF, 400V

+

-

LCH

CH1_OUT

Z1

5.1V

CT_PGND

CT_SGND

Z3

5.1V

CT_SGND

R3100k

R5

330 C1

1nF

R6

330 C2

1nF

R11

*3.01k 1%

R12

*3.01k 1%

CT_SGND

C5

2.2nF,50V

C11

2.2nF,50V

R19

180R

R23

180R

R1

10k

Prot 1

Red LED

CT_SGND

R55

10k

R53

47k

R54

10k R58

47k

R59

10k

R60

47k

12

3

54

6

S1

SW SPDT

C41

0.1uF

Q3

MMBT5551

Q4

MMBT5551

+B

SD

OVP

UVP

+B CT_PGND

+B

GND

VSS1

C29

0.1uF,100V

R41

1R

D2

+B

GND

SD

VCC

R32

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

U2

PQFN

C16

1nF

+5V

-5V

SD

C22

10uF

22uF

C24

C9

2.2nF,50V

C14

2.2nF,50V

C10 22uF, 16V

C18

4.7uF,10V

C20

4.7uF,10V

D4

1N4148

R30

4.7R

R22 180R

-B VS2

R50 2.2k

R4810, 1W

C36

0.47uF, 400V

RCH

CH2_OUT

CT_PGND

CT_SGND

R4100k

R7

330 C3

1nF

R8

330 C4

1nF

R13

*3.01k 1%

R14

*3.01k 1%

CT_SGND

C8

2.2nF,50V

C12

2.2nF,50V

R21

180R

R24

180R

Prot 2

Red LED

CT_SGND

VSS2

C30

0.1uF,100V

R42

1R

3

2

1

FET2

BS250F

3

2

1

FET1

BS250F

52V version

GND

C44

NM

R36

NM

2

1

3

5

4

CN1

1

23 MJD44H11T4GQ1

Z5

11V

CP5

22uF

+B

1

2

P3

+B

GND

1

2

P1

1

2

P2

C38

0.1uF, 63V

OFF

ON

VAA2

VAA1

CT_SGND CT_PGND

INPUT GND

R61

10R

DS1

CT_PGND

D9

1N4148

D10

1N4148

C45 470pF, 50V

GND

CP1

2.2uF

C37

0.1uF, 63V

R63

10R

CT_PGND CT_PGND

CT_PGNDCT_PGND

Z2

5.1V

Z4

5.1V

CP2

2.2uF

CP3

2.2uF

CP4

2.2uF

R38

NM

R15 68.1k 1%

R25

*560 1W

R10

47K

R9

47K

R2

10k

R62

10k

R39

560 1/2W

R35 9.1k

R40 9.1k

R33

33K

R34

33K

C31

0.1uF,100V

C32

0.1uF,100V

C42

2200uF, 63V

C39

0.1uF,100V

C40

0.1uF,100V

C43

2200uF, 63V

+30-52V

L1

22uH

L2

22uH

R16 68.1k 1%

R17 68.1k 1%

R18 68k 1%

D6

D5

D7

D8

Power Supply

Voltage Range

390ohm

36V

560Ohm

27V

41-52V 30-41V

R25~R28,R56

Z5

*

R57,R64,R65

Z7

56V

*

Z8

*36V

R38

R61

Single Supply

Not mounted

10 Ohm

Dual Supply

10 Ohm

Not mounted

R37

560 1/2W

R56

560 1/2W

R57

*560 1W

R26

560 1/2W

R27

*560 1W

R64

560 1/2W

R65

*560 1W

R28

560 1/2W

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IRAUDAMP19 REV 3.0

Bill of Materials

No Part Number Designator Description Quantity Vendor

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

4 478-1429-1-ND C17, C18, C19, C20 CAP CER 4.7UF 10V Y5V 0805 4 Digikey

5 399-3525-1-ND C21, C22

CAP CERAMIC 10UF 16V X7R

1206 2 Digikey

6 445-6797-1-ND C23, C24

CAP CER 22UF 16V 10% X5R

0805 2 Digikey

7 445-1418-1-ND C29, C30

CAP CER .10UF 100V X7R

10% 0805 2 Digikey

8 445-1377-1-ND C31, C32, C39, C40

CAP CER 0.1UF 100V 10%

X7R 1206 4 Digikey

9 495-1315-ND C35, C36

CAP FILM 0.47UF 400VDC

RADIAL 2 Digikey

10 BC2054-ND C37, C38

CAP FILM MKP .1UF 63VDC

2% 2 Digikey

11 311-1140-1-ND C41

CAP .10UF 50V CERAMIC X7R

0805 1 Digikey

12 565-1137-ND C42, C43

CAP ALUM 2200UF 63V 20%

RADIAL 2 Digikey

13 311-1124-1-ND C45

CAP 470PF 50V CERAMIC

X7R 0805 1 Digikey

14 CP1-3545N-ND CN1

CONN JACK STEREO R/A

5PIN 3.5MM 1 Digikey

15 565-1103-ND CP1, CP2, CP3, CP4

CAP ALUM 2.2UF 50V 20%

RADIAL 4 Digikey

16 565-1056-ND CP5

CAP 22UF 25V ELECT VR

RADIAL 1 Digikey

17 1N4148WS-FDICT-ND D1, D2

DIODE SWITCH 75V 200MW

SOD323 2 Digikey

18 1N4148WDICT-ND D3, D4, D9, D10

DIODE SWITCH 100V 400MW

SOD-123 4 Digikey

19 S1DFSCT-ND D5, D6, D7, D8 DIODE GP 200V 1A DO214AC 4 Digikey

20 160-1647-1-ND DS1

LED BLUE CLEAR THIN 0603

SMD 1 Digikey

21 BS250FCT-ND FET1, FET2

MOSFET P-CH 45V 90MA

SOT23-3 2 Digikey

22 7G14A-220M-B L1, L2 Class D Inductor, 22UH 2

Inductors,

Inc

23 281-1414-ND P1, P3

CONN TERM BLOCK PCB

5.0MM 2POS 2 Digikey

24 281-1414-ND P2

CONN TERM BLOCK PCB

5.0MM 2POS 1 Digikey

25 160-1182-1-ND Prot1, Prot2

LED RED ORANGE CLEAR

0603 SMD 2 Digikey

26 MJD44H11T4GOSCT-

ND Q1

TRANS PWR NPN 8A 80V

DPAK 1 Digikey

27 MMBT5551FSCT-ND Q3, Q4

TRANSISTOR NPN 160V SOT-

23 2 Digikey

28 311-10KGRCT-ND R1, R2, R62

RES 10K OHM 1/10W 5% 0603

SMD 3 Digikey

29 RMCF0603JT100KCT-

ND R3, R4

RES 100K OHM 1/10W 5%

0603 SMD 2 Digikey

30 RMCF0603JT330RCT-

ND R5, R6, R7, R8

RES 330 OHM 1/10W 5% 0603

SMD 4 Digikey

31 RHM47KGCT-ND R9, R10

RES 47K OHM 1/10W 5% 0603

SMD 2 Digikey

32 RHM3.01KCRCT-ND R11, R12, R13, R14

RES 3.01K OHM 1/8W 1% 0805

SMD 4 Digikey

33 RMCF0805FT68K1CT-

ND R15, R16, R17, R18

RES 68.1K OHM 1/8W 1% 0805

SMD 4 Digikey

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IRAUDAMP19 REV 3.0

34 RHM180GCT-ND

R19, R20, R21, R22,

R23, R24

RES 180 OHM 1/10W 5% 0603

SMD 6 Digikey

35 RHM560BCCT-ND R25, R27, R57, R65

RES 560 OHM 1W 5% 2512

SMD 4 Digikey

36 560H-ND

R26, R28, R37, R39,

R56, R64 RES 560 OHM 1/2W 5% AXIAL 6 Digikey

37 P4.7ACT-ND R29, R30, R31, R32

RESISTOR 4.7 OHM 1/8W 5%

0805 4 Digikey

38 RHM33KGCT-ND R33, R34

RES 33K OHM 1/10W 5% 0603

SMD 2 Digikey

39 RHM9.1KARCT-ND R35, R40

RES 9.1K OHM 1/8W 5% 0805

SMD 2 Digikey

40 1.1KW-1-ND R37

RES 1.1K OHM 1W 5% METAL

OXIDE 2 Digikey

41 923345-06-ND JW1

JUMPER WIRE 0.6" LONG

PKG OF 150 1 Digikey

42 P1.0ACT-ND R41, R42

RESISTOR 1.0 OHM 1/8W 5%

0805 2 Digikey

43 541-10.0AFCT-ND R47, R48

RES 10.0 OHM 1W 1% 2512

SMD 2 Digikey

44 RMCF0805JT2K20CT-

ND R49, R50

RES 2.2K OHM 1/8W 5% 0805

SMD 2 Digikey

45 541-10KVCT-ND R51, R52

RES 10K OHM 1/2W 5% 1210

SMD 2 Digikey

46 RHM47KARCT-ND R53, R58, R60

RES 47K OHM 1/8W 5% 0805

SMD 3 Digikey

47 RHM10KARCT-ND R54, R55, R59

RES 10K OHM 1/8W 5% 0805

SMD 3 Digikey

48 311-10ARCT-ND R61

RES 10 OHM 1/8W 5% 0805

SMD 1 Digikey

49 311-10ARCT-ND R63

RES 10 OHM 1/8W 5% 0805

SMD 1 Digikey

50 360-1758-ND S1

SWITCH TOGGLE SPDT .4VA

SEAL PCB 1 Digikey

51 IR4301M U1, U2

1 CH PowIRaudio integrated

Class D IC 2 IR

52 DDZ5V1BDICT-ND Z1, Z2, Z3, Z4

DIODE ZENER 5.1V 500MW

SOD-123 4 Digikey

53 BZT52C11-FDICT-ND Z5

DIODE ZENER 11V 500MW

SOD123 1 Digikey

54 MMSZ5263BT1GOSCT-

ND Z7

DIODE ZENER 56V 500MW

SOD123 1 Digikey

55 BZT52C36-FDICT-ND Z8*

DIODE ZENER 36V 500MW

SOD123 1 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

Z5 36V 27V

www.irf.com Page 12 of 14

IRAUDAMP19 REV 3.0

PCB Specifications

PCB:

1. Two Layers SMT PCB with through holes

2. 1/16 thickness

3. 2/0 OZ Cu

4. FR4 material

5. 10 mil lines and spaces

6. Solder Mask to be Green enamel EMP110 DBG (CARAPACE) or Enthone Endplate

DSR-3241or equivalent.

7. Silk Screen to be white epoxy non conductive per IPC–RB 276 Standard.

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.

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IRAUDAMP19 REV 3.0

PCB Layout

Top side:

Fig 8

Bottom side:

Fig 9

Note: Refer to AN1170 for footprint and board mounting details.

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IRAUDAMP19 REV 3.0

Revision changes descriptions

Revision Changes description Date

Rev 1.0 Released May, 16 2012

Rev 2.0

Rev 3.0

100W version

Housekeeping’s power resistors have been

changed from 1.2kohm to 560ohm

April, 26 2013

October,24 2014

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

Infineon IRAUDAMP19 User manual

Infineon IRAUDAMP19 User manual

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