IRAUDAMP21 - INFINEON TECHNOLOGIES AG

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IRAUDAMP21 REV 1.0

IRAUDAMP21

90W/2Ω x 2 Channel Class D Audio Power Amplifier

Using the IR4321

By

Jun Honda, Alvin Rojas

CAUTION:

International Rectifier suggests the following guidelines for safe operation and

handling of IRAUDAMP21 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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IRAUDAMP21 REV 1.0

TABLE OF CONTENTS ........................................................ PAGE

INTRODUCTION............................................................................................................................................... 3

SPECIFICATIONS ............................................................................................................................................ 3

CONNECTOR DESCRIPTION ......................................................................................................................... 5

TEST PROCEDURES....................................................................................................................................... 6

PERFORMANCE AND TEST GRAPHS .......................................................................................................... 7

THERMAL INFORMATION ............................................................................................................................ 10

SCHEMATIC................................................................................................................................................... 13

BILL OF MATERIALS .................................................................................................................................... 15

PCB SPECIFICATIONS ................................................................................................................................. 18

REVISION CHANGES DESCRIPTIONS........................................................................................................ 22

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IRAUDAMP21 REV 1.0

Introduction

The IRAUDAMP21 reference design is a two-channel, 90W/ch (2Ω/±18V; no heatsink)/ 135W/ch

(2Ω/±22V; *with heatsink) half-bridge Class D audio power amplifier. This reference design

demonstrates how to use the IR4321 IC, implement protection circuits, and design an optimum PCB

layout using PowIRaudio integrated Class D IC. This reference design does not require 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: 90W x 2 channels (10%THD+N 2Ω load; no heatsink),

135W x 2 channels (10%THD+N 2Ω load; *with 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

DC-protection (DCP),

Over-temperature protection (OTP)

PWM Modulator: Self-oscillating half-bridge topology with optional clock

synchronization

Specifications

General Test Conditions (unless otherwise noted) Notes / Conditions

±12V~±18V Bipolar power supply; without heatsink

Supply Voltages ±12V~±22V Bipolar power supply; *with heatsink

Load Impedance 4-2Ω Resistive load

Self-Oscillating Frequency 400kHz No input signal, Adjustable

Gain Setting 26dB 1Vrms input yields rated power

Electrical Data Typical Notes / Conditions

IR Devices Used IR4321 PowIRaudio integrated Class D IC

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

70W 1kHz, 4Ω load, without heatsink

70W 1kHz, 4Ω load, *with heatsink

90W 1kHz, 3Ω load, without heatsink

90W 1kHz, 3Ω load, *with heatsink

70W 1kHz, 2Ω load, without heatsink

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

100W 1kHz, 2Ω load, *with heatsink

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IRAUDAMP21 REV 1.0

90W 1kHz, 4Ω load, without heatsink

90W 1kHz, 4Ω load, *with heatsink

120W 1kHz, 3Ω load, without heatsink

120W 1kHz, 3Ω load, *with heatsink

90W 1kHz, 2Ω load, without heatsink

Output Power CH1-2: (10% THD+N)

135W 1kHz, 2Ω load, *with heatsink

Rated Load Impedance 4-2Ω Resistive load

Idling Supply Current ±70mA No input signal

Total Idle Power Consumption 2.4W No input signal

Distortion 0.016% THD+N @ 40W, 2Ω

Residual Noise 250V IHF-A weighted, AES-17 filter

Channel Efficiency 88% Single-channel driven, 90W (With No

heatsink), Class D stage

*Tested with custom heat sink with thermal pad BER161-ND

Connection Setup

Figure 1 Typical Test Setup

Volume

J6 J5

J3 J4

J7

R113

S3 S2

CH1

Output CH2

Output

CH1

Input CH2

Input

G

Protection

Normal

S1

12V~18V*, 5A DC supply

2 Ohm 2 Ohm

12V~18V*, 5A DC supply

250W, Non-inductive Resistors

J8

J9

Audio Signal Generator

IR4321

* With heatsink Power supply

can go up to +/-22V

SW1:PWM Shutdown/MUTE

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IRAUDAMP21 REV 1.0

Connector Description

CH1 IN J6 Analog input for CH1

CH2 IN J5 Analog input for CH2

POWER J7 Positive and negative supply (+B / -B)

CH1 OUT J3 Output for CH1

CH2 OUT J4 Output for CH2

EXT CLK J8 External clock sync

DCP OUT J9 DC protection relay output

Audio Precision-Setup

IRAUDAMP21 and Audio Precision shall be connected according to the Figure below:

Figure 2

+ - + G - -

A B

-

CH1

AB

Gen

Power Supply

+/- 35V

CH2

+

Amp5

+

-

CH2

DB_209_Rev 2.0

4 Ohms4 Ohms

Audio Precision

Bal inputs

IR4321

_

DB

+/-18V*

AMP21

* With heatsink Power supply

can go up to +/-22V

2 2

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IRAUDAMP21 REV 1.0

Test Procedures

Test Setup:

1. Connect 2-250 W dummy loads to output connectors (J3 and J4 as shown on

Figure 1) and parallel it with input of Audio Precision analyzer (AP).

2. Connect Audio Signal Generator to J6 and J5 for CH1 and CH2 respectively (Ap).

3. Set up the dual power supply with voltages of ±12V~±18V (up to ±22V with

heatsink); set current limit to 5A.

4. Set switch S1 to middle position (self oscillating).

5. Set volume level knob R130 fully counter-clockwise (minimum volume).

6. Connect the dual power supply to J7. as shown on Figure 1

Power up:

7. Turn ON the dual power supply. The ±B supplies must be applied and removed at

the same time.

8. Red LED (Protection) should turn on almost immediately and turn off after about 3s.

9. Green LED (Normal) then turns on after red LED is extinguished and should stay on.

10. Quiescent current for the positive supply should be 60mA 10mA at +18V.

11. Quiescent current for the negative supply should be 75mA 10mA at –18V.

12. Push S3 switch (Trip and Reset push-button) to restart the sequence of LEDs

indicators, which should be the same as noted above in steps 9-10.

Functionality Audio Tests:

13. Apply 1V RMS at 1kHz sinusoidal signal from the Audio Signal Generator.

14. Turn control volume up (R130 clock-wise) to obtain an output reading of 70Watts.

15. For all subsequent tests as shown on the Audio Precision graphs below (Figure 3-

Figure7), the measurements are taken across J3 and J4 with an AES-17 Filter.

Observe that a 1 VRMS input generates an output around THD+N=1% power level.

16. Sweep the audio signal voltage from 15 mVRMS to 1 VRMS.

17. Monitor the output signals at J3/J4 with an oscilloscope. The waveform must be a

non distorted sinusoidal signal with input signal below 1Vrms.

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IRAUDAMP21 REV 1.0

Performance and Test Graphs

Power vs THD+N

Test Conditions:

VBus = ± 18V

Input Signal = 1 KHz

Load Impedance = 2 ohms

Set Gain = 1% clipping 70W

Amp21_22 PWR vs THD.at27

ColorSweep Trace Line Style Thick Data Axi s Comment

1 1 Red Solid 3Anlr.THD+N Ratio Left CH1

1 3 Blue Solid 3Anlr.THD+N Ratio Left CH2

0.001

10

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

1

2

5

%

100m 100200m 500m 1 2 5 10 20 50

W

Figure 3

Power vs THD+N (with heatsink)

Test Conditions:

VBus = ± 22V

Input Signal = 1 KHz

Load Impedance = 2 ohms

Set Gain = 1% clipping 100W

Amp21_22 PWR vs THD.at27

ColorSweep Trace Line Style Thick Data Axi s Comment

1 1 Red Solid 3Anlr.THD+N Ratio Left CH1

1 3 Blue Solid 3Anlr.THD+N Ratio Left CH2

0.001

10

0.002

0.005

0.01

0.02

0.05

0.1

0.2

0.5

1

2

5

%

90m 200200m 500m 1 2 5 10 20 50 100

W

Figure 4

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IRAUDAMP21 REV 1.0

Frequency Response

Test Conditions:

VBus = ± 18V

Set Output = 1V

Load Impedance = 2 ohms

Amp21_22FR.at27

ColorSweep Trace Line Style Thick Data Axi s Comment

1 1 Red Solid 3Anlr.Level A Left CH1

1 2 Blue Solid 3Anlr.Level B Left CH2

-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 = ± 18V

Load Impedance = 2 ohms

Set Gain = 1% clipping

No Input Signal

Amp19FTT,Flloor noise.at27

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Red Solid 3Fft.Ch.1 Ampl Left CH1

1 2 Blue Solid 3Fft.Ch.2 Ampl Left CH2

-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

Figure 5

Figure 6

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IRAUDAMP21 REV 1.0

Noise Floor with 1Vrms Output

Test Conditions:

VBus = ± 18V

Output = 1Vrms @ 1 KHz

Load Impedance = 2 ohms

Set Gain = 1% clipping

Amp21_22_FFT_1V.at27

ColorSweep Trace Line Style Thick Data Axis Comment

1 1 Red Solid 3Fft.Ch.1 Ampl Left CH1

1 2 Blue Solid 3Fft.Ch.2 Ampl Left CH2

-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

Efficiency

Tested with no heat sink

Figure 8

Figure 7

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IRAUDAMP21 REV 1.0

Thermal Information

1) 1/8 Po Thermal information for IRAUDAMP21

Conditions:

 Tamb=25°C natural convection cooling

 Both Channel Driven 1/8Po continuous 30minus

 Temperature measured by INFRARED Camera

 Measuring temperature point:

IR4321’s temperature saturated ≤85°C within 30minutes

Figure 9

load impedance 1/8 Power(W) THD=1% power(W) THD=10% power(W)

9.28 70 90

4Ω load

*9.28 *70 *90

9.88 75 100

3Ω load

*12.29 *95 *120

8.92 70 90

2Ω load

*12.68 *100 *135

*With heatsink

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IRAUDAMP21 REV 1.0

2) Peak Power duration (no heatsink)

Test conditions:

 1kHz sine wave signal input ; Both channels driven

 Fsw=400kHz

LoadZ10%THD

PoWDuration

2Ω 90 Till Thermal Shutdown

3Ω 120 Till Thermal Shutdown

4Ω 90 No Thermal Shutdown

3) Peak Power duration (With heatsink)

Test conditions:

 1kHz sine wave signal input ; Both channels driven

 Fsw=400kHz

LoadZ10%THD

PoWDuration

2Ω 135 No Thermal Shutdown

3Ω 120 No Thermal Shutdown

4Ω 90 No Thermal Shutdown

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IRAUDAMP21 REV 1.0

4) Heatsink installation

Heatsink Installation:

1, Drill a hole in the center of daughter board.

2, Mount heatsink and thermal pad on the back of daughter board.

3, Extend daughter board’s pins with cables as Figure20.

Digikey part#

Thermal pad BER161-ND

Figure 10

Custom fit

Heat Sink

BER161-ND

Drill a hole

Mount heatsink and

thermal pad on the

back of DB. Extend daughter

board’s pins with

cables

21mm

56mm

38mm

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IRAUDAMP21 REV 1.0

Schematic

D1 R1

100R

R3

10R

C21

0.1uF,100V

+B

-B

SD

VCC

R5

10R

VSS

VAA

GND1

CH1

R17

4.7R C17

0.1uF

R27

1R

C11

1nF

CH1 Output to LPF1

+18V Bus

-18V Bus

+5V

-5V

Audio Gnd 1

SD

-35V Bus

VAA

VSS

IN-1

CH1 O

+B

CH1

C13

10uF

C19

0.1uF,100V

22uF

C15

TP1

Class D, Daughter Board IR4321 Module Schematic

9

10

11

12

13

14

15

16

J2A

A26570-ND

1

2

3

4

5

6

J1A

A26568-ND

R7

2.7k

SCH_DB_4321Rev3.2

D2 R2

100R

R4

10R

C22

0.1uF,100V

+B

-B

SD

VCC

R6

10R

VSS

VAA

GND2

CH2

R18

4.7R C18

0.1uF

R28

1R

C12

1nF

+18V Bus

-18V Bus

+5V

-5V

Audio Gnd 2

SD

-35V Bus

C14

10uF

C20

0.1uF,100V

22uF

C16

R8

2.7k

IN-2

GND2

Audio Gnd 2

SDVSS VCC7

8

9

10

11

12

J1B

A26568-ND

CH2 Output to LPF2

-B

CH2

TP2

1

2

3

4

5

6

7

8

J2B

A26570-ND

C3

2.2nF,50V

C5

2.2nF,50V

C4

2.2nF,50V

C6

2.2nF,50V

IN2 12

PWM1 3

VSS 2

VCC 10

SD 11

OT 1

VSS 8

PWM2 7

GND1 5

IN1 4

VAA 6

GND2 9

J1

CON EISA31

SD

-B

+B

CH1 O

CH2 O

-B 6

+B 15

GND 16

-B 7

CH1 O 9

CH2 O 1

CH2 O 2

CH1 O 10

-B 5

CH2O 3

CH2 O 4

-B 8

CH1 O 11

CH1 O 12

+B 14

+B 13

J2

VAA

CH2 O

VSS

IN-1

GND1

VSS

GND2

VCC

IN-2

C1 10uF, 16V

C2 10uF, 16V

C7 4.7uF,10V

C9 4.7uF,10V

C8 4.7uF,10V

C10 4.7uF,10V

D3

1N4148

D4

1N4148

R16

4.7R

R15

4.7R

R9 620R

R10 620R

-B

R31

10K

R32

10K

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

D5

1N4148

D6

1N4148

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

-B

Figure 11

J5

R5

4.7R

R13

3.3K 1

2

J3

L1 10uH

R31

47k 1%

R58

100K

J6

R4

100R R14

3.3K

R32

47k 1%

C32

1000uF,25V

C31

1000uF,25V

R57

100K

C27

OPEN

C26

0. 1uF, 400V

C28

OPEN

L2 10uH

R48

10, 1W

R34

1K

R33

1K

C18

150pF, 500V

C17

150pF, 500V

CH 1 OUT

CH 2 OUT

CH2 IN

CH1 IN

1

2

J4

C33

OPEN

C34

OPEN

R39

470

R40

470

R49

2.2k

R3

100R

R1

100K

C2

10uF, 50V

C3

10uF, 50V

R2

100K

R6

4.7R

R7 47R

R8 47R

R9 10R

R10

47R

R11

47R

C1

10uF, 50V

R50

2.2k

R17

22k

R18

22k

C16

33pF

MUTE

C25

0. 1uF, 400V

R47

10, 1W

C15

33pF

U374AHC1G04

U474AHC1G04

C19

2.2uF,16V

C20

2.2uF,16V

R27

47R

R28

47R

C23

1uF, 250V

C24

1uF, 250V

-5V

+5V

C5

10uF, 50V

C6

10uF, 50V

+5V

CLK

D5

D7

D8

D6

-B

+B

-B

+B

-B

+B

CH1 O

+B

CH2 O

-B

SD

IN-1

VCC

OC

IN-2

+5V -5V

-5V

VSS

8

VR0

7

VR1

6

CLK

5

VDD 1

CS 2

SDATA 3

SIMUL 4

U_2

3310S06S

R108

C107

4. 7uF, 16V

C108

10nF, 50V

SCLK

SDATAI

C109

4. 7uF, 16V

CS

+5V

Contr ol V o lume

R55

0.0

R56

0.0

I R432X_ MODULE

CH1 Feedback

CH2 Feedback

+5V

Audio in

Z102

Short

R104

0R, 1W

C103

10uF, 50V

IN

GND

OUT

U_5 MC79M05

C102

10uF, 50V

R102

0R, 1W

C101

10uF, 50V

Vin

GND

Vout

U_4 MC78M05

Z101

Short D102

MA2YD2300

D101

MA2YD2300 C104

10uF, 50V

R101

0R, 1W

R103

0R, 1W

-B

-5V+5V

+B

C105

10uF, 50V

R105

10R

C106

10uF, 50V

Vin

GND

Vout

U_6

MC78M12

Z103

Short

Q102

MMBT5401

R107

4.7K

R106

47K

Z104

15V

Q101

FX941

VCC

+B

-B

HS1

VCC P ower Supp ly +5V P ower Supply -5V Power Supp ly

R71

OPEN

R72

OPEN

Class D, Mother Board Control Volum e and Power Supplies Schematic

1

2

3

4

5

6

J1A

7

8

9

10

11

12

J1B

9

10

11

12

13

14

15

16

J2A

1

2

3

4

5

6

7

8

J2B

ZCEN

1

CS

2

SDATAI

3

VD+

4

DGRD

5

SCLK

6

SDATAO

7

MUTE

8

AINL 16

AGNDR 10

AOUTL 14

VA- 13

VA+ 12

AOUTR 11

AGNDL 15

AINR 9

U_?

CS3310

Trace under J7

C ha ssis Gnd

Heat Sink

VCC UVP

1

2

3

J7

+18V

-18V

Gnd

+

-

CH1

CH2

+

-

Figure 12

www.irf.com Page 14 of 22

IRAUDAMP21 REV 1.0

PROTECTION

R124

10k

R121

47k

R122

47k

CH 1 O

CH 2 O

Q106

MMBT5401

Q104

MMBT5401

C116

100uF, 16V

R141

47k

NORMAL

R123

1K

Q108

MMBT5551

S1

SW-PB

MUTE

1

2

3

6

5

4

P1

PVT412

1

2

J9

DC_PS

MUTE

Q105 MMBT5551

R125

10K

R126

100K

+B

Q109

MMBT5551

R139

47k

-B

SD

D105

1N4148

R138

4.7k

Z106

18V Z107

10V

R145

47K

R146

47K

Q110

MMBT5551

R144

10k

D107

1N4148

D106

1N4148

C117

100uF, 16V

+5V

R142

68k

+5V

R119

1k

R136

68k

R135

82k

1A

1Y

2A

2Y

3A

3Y

GND

VCC

6A

6Y

5A

5Y

4A

4Y

U_3

74HC14

R120

100R

C114

10nF, 50V

+5V

I

E

S

SW

S3A

SW-3WAY_A-B

R109

1K

R110

100k

C110

1nF, 50V

C112

1200pF, 50V

D103

1N4148

CLK

R116

47R

CLK

I

E

S

SWS3B

SW-3WAY_A-B

EXT. CLK

A24497

J8

BNC

R115

47R

R114

100R

R113

5K POT

R112

820R

C111

100pF, 50V

Q103

MMBT5551

2

1S2

SW_H-L

R111

10K

C113

100pF, 50V

R134

10k

R117

47R

R143

10K

SP MUTE

R118

1k

Trip and restart

R129

6.8k

C115

10uF, 50V

-B

R140

10k

Z105

27V

DC protection

OVP

R132

47k

Q107

MMBT5551

D104

1N4148

R133

47k

DCP

R127

6.8k

R128

6.8k

R130

47K

R131

47K

R148

10k

R147

47k

Q111

MMBT5401

+B

R149

47K

C119

0. 1u F, 50V

UVP

Z108

8.2V

R137

47k

-5V

OT

CStart

Q112

MMBT5551

-5V +5V

Z109

8.2V

R150

47k

R151

47k

+B

Class D, Moth er Boar d Clock and House Keeping Schemat i c

. Figure 13

www.irf.com Page 15 of 22

IRAUDAMP21 REV 1.0

Bill of Materials

IRAUDAMP21 Daughter Board BOM

No Part Number Designator Description Quantity Vendor

1 445-1601-1-ND C1, C2

CAP CER 10UF 16V 20% X7R

1206 2 Digikey

2 445-1309-1-ND C3, C4, C5, C6

CAP CER 2200PF 50V 10% X7R

0603 4 Digikey

3 587-1442-1-ND C7, C8, C9, C10

CAP CER 4.7UF 10V 10% X7R

0805 4 Digikey

4 478-1215-1-ND C11, C12

CAP CER 1000PF 50V 10% X7R

0603 2 Digikey

5 399-4939-1-ND C13, C14

CAP CER 10UF 16V 20% X7R

1206 2 Digikey

6 445-6797-1-ND C15, C16

CAP CER 22UF 16V 10% X5R

0805 2 Digikey

7 311-1140-1-ND C17, C18

CAP CER 0.1UF 50V 10% X7R

0805 2 Digikey

8 478-1529-1-ND C19, C20, C21, C22

CAP CER 0.1UF 100V 10% X7R

1206 4 Digikey

9 1N4148WS-FDICT-ND D1, D2

DIODE SWITCH 75V 200MW

SOD323 2 Digikey

10 1N4148W-FDICT-ND D3, D4, D5, D6

DIODE SWITCH 100V 400MW

SOD123 4 Digikey

11 A26568-ND J1A, J1B

CONN HEADER VERT 6POS .100

30AU 2 Digikey

12 A26570-ND J2A, J2B

CONN HEADER VERT .100 8POS

30AU 2 Digikey

13

RMCF0603JT100RCT-

ND R1, R2

RES 100 OHM 1/10W 5% 0603

SMD 2 Digikey

14

RMCF0603JT10R0CT-

ND R3, R4, R5, R6

RES 10 OHM 1/10W 5% 0603

SMD 4 Digikey

15

RMCF0603FT2K70CT-

ND R7, R8

RES 2.7K OHM 1/10W 1% 0603

SMD 1 Digikey

16 311-620GRCT-ND R9, R10

RES 620 OHM 1/10W 5% 0603

SMD 2 Digikey

17 311-4.7GRCT-ND R15, R16, R17, R18

RES 4.7 OHM 1/10W 5% 0603

SMD 4 Digikey

18 311-1.0GRCT-ND R27, R28

RES 1.0 OHM 1/10W 5% 0603

SMD 2 Digikey

19

RMCF0603JT10K0CT-

ND R31, R32

RES 10K OHM 1/10W 5% 0603

SMD 2 Digikey

20 IR4321 U1, U2 PowIRaudio integrated Class D IC 2 IR

*Heatsink is an option for IRAUDAMP21 to deliver high power up to 135W/2Ω

IRAUDAMP21 Mother Board BOM

NO Part No Designator Description # Vender

1 565-1106-ND

C1, C5, C6, C101, C102,

C103, C104, C105, C106,

C115 CAP ALUM 10UF 50V 20% RADIAL 10 Digikey

2 565-1103-ND C2, C3 CAP ALUM 2.2UF 50V 20% RADIAL 2 Digikey

3 478-1281-1-ND C15, C16 CAP CER 33PF 100V 5% NP0 0805 2 Digikey

4 338-2598-ND C17, C18 CAP MICA 150PF 500V 5% RADIAL 2 Digikey

5 PCC1931CT-ND C19, C20 CAP CER 2.2UF 16V 10% X7R 1206 2 Digikey

6 PCC104BCT-ND C119 CAP CER 0.1UF 50V 10% X7R 1206 1 Digikey

7 399-5960-ND C23, C24 CAP FILM 1UF 250VDC RADIAL 2 Digikey

8 495-1311-ND C25, C26 CAP FILM 0.1UF 400VDC RADIAL 2 Digikey

9 565-1086-ND C31, C32 CAP ALUM 1000UF 35V 20% RADIAL 2 Digikey

10 PCC2323CT-ND C107, C109 CAP CER 4.7UF 16V 10% X5R 0805 2 Digikey

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IRAUDAMP21 REV 1.0

11 PCC103BNCT-ND C108, C114

CAP CER 10000PF 50V 10% X7R

0805 2 Digikey

12 PCC102CGCT-ND C110 CAP CER 1000PF 50V 5% NP0 0805 1 Digikey

13 PCC101CGCT-ND C111, C113 CAP CER 100PF 50V 5% NP0 0805 2 Digikey

14 478-1372-1-ND C112 CAP CER 1200PF 50V 10% X7R 0805 1 Digikey

15 565-1037-ND C116, C117 CAP ALUM 100UF 16V 20% RADIAL 2 Digikey

16 1N4148W-FDICT-ND

D103, D104, D105, D106,

D107

DIODE SWITCH 100V 400MW

SOD123 5 Digikey

17 MURA120T3GOSCT-ND D5, D6, D7, D8 DIODE ULTRA FAST 1A 200V SMA 4 Digikey

18 MA2YD2300LCT-ND D101, D102 DIODE SCHOTTKY 25V 1.0A MINI-2P 2 Digikey

19 294-1086-ND HS1 HEATSINK HORZ SIX BLACK TO-220 1 Digikey

20 A32934-ND J1A, J1B

CONN RECEPT 6POS .100 VERT

DUAL 2 Digikey

21 A32935-ND J2A, J2B

CONN RECEPT 8POS .100 VERT

DUAL 2 Digikey

22

277-1271-ND or 651-

1714971 J3, J4

CONN TERM BLOCK 2POS 9.52MM

PCB 2

Digikey or

Mouser

23 CP-1422-ND J5, J6 CONN RCA JACK R/A BLUE PCB 2 Digikey

24

277-1272-ND or 651-

1714984 J7

CONN TERM BLOCK 3POS 9.52MM

PCB 1

Digikey or

Mouser

25 A32248-ND J8

CONN JACK BNC R/A 50 OHM PCB

TIN 1 Digikey

26 ED1567 J9

TERMINAL BLOCK 7.50MM VERT

2POS 1 Digikey

27 7G17A-100M-R L1, L2 Class D inductor, 10uH 2

Inductors,

Inc

7G17A-100M-B

Inductors,

Inc

911-1D17A-100M Mouser

28 160-1143-ND NORMAL LED 3MM GREEN TRANSPARENT 1 Digikey

29 PVT412PBF-ND P1

IC RELAY PHOTOVO 400V 140MA

6DIP 1 Digikey

30 160-1140-ND PROTECTION

LED 3MM HI-EFF RED

TRANSPARENT 1 Digikey

31 FCX491CT-ND Q101 TRANSISTOR NPN 60V 1A SOT-89 1 Digikey

32 MMBT5401-FDICT-ND Q102, Q104, Q106, Q111

TRANS PNP 150V 350MW SMD

SOT23-3 4 Digikey

33 MMBT5551-FDICT-ND

Q103, Q105, Q107, Q108,

Q109, Q110, Q112

TRANS NPN 160V 350MW SMD

SOT23-3 7 Digikey

34 P100KACT-ND

R1, R2, R57, R58, R110,

R126 RES 100K OHM 1/8W 5% 0805 SMD 6 Digikey

35 P100ACT-ND R3, R4, R114 RES 100 OHM 1/8W 5% 0805 SMD 3 Digikey

36 P4.7ECT-ND R5, R6 RESISTOR 4.7 OHM 1/4W 5% 1206 2 Digikey

37 P47ACT-ND

R7, R8, R10, R11, R27,

R28, R115, R116, R117 RES 47 OHM 1/8W 5% 0805 SMD 9 Digikey

38 P10ACT-ND R9, R105 RES 10 OHM 1/8W 5% 0805 SMD 2 Digikey

39 P3.3KACT-ND R13, R14 RES 3.3K OHM 1/8W 5% 0805 SMD 2 Digikey

40 P22KACT-ND R17, R18 RES 22K OHM 1/8W 5% 0805 SMD 2 Digikey

41 P47KACT-ND

R106, R121, R122, R130,

R131, R132, R133, R137,

R139, R141, R145, R146,

R147, R149, R150, R151 RES 47K OHM 1/8W 5% 0805 SMD 16 Digikey

42 P0.0ACT-ND R55, R56 RES 0.0 OHM 1/8W 0805 SMD 2 Digikey

43 P470ACT-ND R39, R40 RES 470 OHM 1/8W 5% 0805 SMD 2 Digikey

44 P100ECT-ND R120 RES 100 OHM 1/4W 5% 1206 SMD 1 Digikey

45 PT47KAFCT-ND R31, R32 RES 47.0K OHM 1W 1% 2512 SMD 2 Digikey

46 P1.0KECT-ND R33, R34 RES 1.0K OHM 1/4W 5% 1206 SMD 2 Digikey

47 P1.0KACT-ND R109, R118, R119, R123 RES 1.0K OHM 1/8W 5% 0805 SMD 4 Digikey

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IRAUDAMP21 REV 1.0

48 PT10XCT R47, R48 RES 10 OHM 1W 5% 2512 SMD 2 Digikey

49 P2.2KECT-ND R49, R50 RES 2.2K OHM 1/4W 5% 1206 SMD 2 Digikey

50 541-0.0XCT-ND R101,R102, R103. R104 RES 0.0 OHM 1W Jump 2512 SMD 4 Digikey

51 P4.7KACT-ND R107, R138 RES 4.7K OHM 1/8W 5% 0805 SMD 2 Digikey

52 CT2265-ND R108 POT 10K OHM 1/8W CARB VERTICAL 1 Digikey

53 P10KACT-ND

R111, R124, R125, R134,

R140, R143, R144, R148 RES 10K OHM 1/8W 5% 0805 SMD 8 Digikey

54 P820ACT-ND R112 RES 820 OHM 1/8W 5% 0805 SMD 1 Digikey

55 3362H-502LF-ND R113 TRIMMER 5K OHM 0.5W TH 1 Digikey

56 P6.8KECT-ND R127, R128, R129 RES 6.8K OHM 1/4W 5% 1206 SMD 3 Digikey

57 P82KACT-ND R135 RES 82K OHM 1/8W 5% 0805 SMD 1 Digikey

58 P68KACT-ND R136, R142 RES 68K OHM 1/8W 5% 0805 SMD 2 Digikey

59 P8010S-ND S1

SWITCH TACTILE SPST-NO 0.02A

15V 1 Digikey

60 EG1908-ND S2 SWITCH SLIDE DPDT 12V .1A L=4 1 Digikey

61 EG1944-ND S3 SWITCH SLIDE DP3T .2A L=6MM 1 Digikey

62 296-1089-1-ND U3, U4 IC SNGL INVERTER GATE SOT23-5 2 Digikey

63 73C8016 or 72J5420 U_1

IC, DIGITAL VOLUME CONTROL,

SOIC-16 1 Newark

64 3310-IR01 U_2 CS3310 Stand-alone Controller 1 *Tachyonix

65 296-1194-1-ND U_3 IC HEX SCHMITT-TRIG INV 14-SOIC 1 Digikey

66 MC78M05CTGOS-ND U_4

IC REG VOLT POS 500MA 5V

TO220AB 1 Digikey

67 LM79M05CT-ND U_5

IC VOLT REG NEG 5V 500MA TO220-

3 1 Digikey

68 LM78M12CT-ND U_6 IC VOLT REG 12V 500MA TO220-3 1 Digikey

69 P0.0ECT-ND Z101, Z102 RES 0.0 OHM 1/4W JUMP 1206 SMD 2 Digikey

70 P0.0ACT-ND Z103 RES 0.0 OHM 1/8W JUMP 0805 SMD 1 Digikey

71 BZT52C15-FDICT-ND Z104 DIODE ZENER 15V 500MW SOD-123 1 Digikey

72 568-6362-1-ND Z105 DIODE ZENER 27V 500MW SOD-123 1 Digikey

73 BZT52C18-FDICT-ND Z106 DIODE ZENER 18V 500MW SOD-123 1 Digikey

74 BZT52C10-FDICT-ND Z107 DIODE ZENER 10V 500MW SOD123 1 Digikey

75 BZT52C8V2-FDICT-ND Z108, Z109 DIODE ZENER 8.2V 500MW SOD-123 2 Digikey

76 10M7578 Volume Knob ROUND KNURLED KNOB, 6MM 1 Newark

77 82K6096

Thermally TO-220 mounting

kit with screw THERMALLOY - 4880G - Mounting Kit 3 Newark

78 8401K-ND 1/2" Standoffs 4-40 STDOFF HEX M/F 4-40 .500"L ALUM 5 Digikey

79 H724-ND 4-40 Nut NUT HEX 4-40 STAINLESS STEEL 5 Digikey

80 H729-ND No. 4 Lock Washer WASHER LOCK INTERNAL #4 SS 5 Digikey

*Tachyonix Corporation, http://www.tachyonix.co.jp

www.irf.com Page 18 of 22

IRAUDAMP21 REV 1.0

PCB Specifications

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 nonconductive 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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IRAUDAMP21 REV 1.0

Daughter Board

Figure 14

Figure 15

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IRAUDAMP21 REV 1.0

Mother Board

Figure 16

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IRAUDAMP21 REV 1.0

Figure 17

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IRAUDAMP21 REV 1.0

Revision changes descriptions

Revision Changes description Date

Rev 1.0 Released Apr,30 2013

WORLD HEADQUARTERS: 101 N. Sepulveda Blvd., El Segundo, California 90245 Tel: (310) 252-7105

Data and specifications subject to change without notice. 05/08/2013