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 www.irf.com IRAUDAMP21 REV 1.0 Page 1 of 22 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 www.irf.com IRAUDAMP21 REV 1.0 Page 2 of 22 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: Multiple Protection Features: PWM Modulator: 90W x 2 channels (10%THD+N 2Ω load; no heatsink), 135W x 2 channels (10%THD+N 2Ω load; *with heatsink), 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) Self-oscillating half-bridge topology with optional clock synchronization Specifications General Test Conditions (unless otherwise noted) ±12V~±18V Supply Voltages ±12V~±22V Load Impedance 4-2Ω Self-Oscillating Frequency 400kHz Gain Setting 26dB Notes / Conditions Bipolar power supply; without heatsink Bipolar power supply; *with heatsink Resistive load No input signal, Adjustable 1Vrms input yields rated power Electrical Data IR Devices Used Modulator Typical Notes / Conditions IR4321 PowIRaudio integrated Class D IC 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 Output Power CH1-2: (1% THD+N) 90W 1kHz, 3Ω load, *with heatsink 70W 1kHz, 2Ω load, without heatsink 100W 1kHz, 2Ω load, *with heatsink www.irf.com IRAUDAMP21 REV 1.0 Page 3 of 22 90W 90W 120W 120W 90W 135W 4-2Ω ±70mA 2.4W 0.016% 250V 88% Output Power CH1-2: (10% THD+N) Rated Load Impedance Idling Supply Current Total Idle Power Consumption Distortion Residual Noise Channel Efficiency 1kHz, 4Ω load, without heatsink 1kHz, 4Ω load, *with heatsink 1kHz, 3Ω load, without heatsink 1kHz, 3Ω load, *with heatsink 1kHz, 2Ω load, without heatsink 1kHz, 2Ω load, *with heatsink Resistive load No input signal No input signal THD+N @ 40W, 2Ω IHF-A weighted, AES-17 filter Single-channel driven, 90W (With No heatsink), Class D stage *Tested with custom heat sink with thermal pad BER161-ND Connection Setup 12V~18V*, 5A DC supply 12V~18V*, 5A DC supply * With heatsink Power supply can go up to +/-22V 250W, Non-inductive Resistors 2 Ohm 2 Ohm SW1:PWM Shutdown/MUTE G J3 CH1 Output J4 S1 CH2 Output J7 J9 IR4321 Protection J6 CH1 Input J8 J5 Normal S2 S3 CH2 Input Volume R113 Audio Signal Generator Figure 1 Typical Test Setup www.irf.com IRAUDAMP21 REV 1.0 Page 4 of 22 Connector Description CH1 IN CH2 IN POWER CH1 OUT CH2 OUT EXT CLK DCP OUT J6 J5 J7 J3 J4 J8 J9 Analog input for CH1 Analog input for CH2 Positive and negative supply (+B / -B) Output for CH1 Output for CH2 External clock sync DC protection relay output Audio Precision-Setup IRAUDAMP21 and Audio Precision shall be connected according to the Figure below: A B Audio Precision A B Bal inputs Gen 2 Ohms 4 + + - - 2 Ohms 4 Power Supply * With heatsink Power supply can go up to +/-22V +/-18V* +/35V + - + G - + CH1 - CH2 DB_209_Rev IR4321_DB2.0 CH1 CH2 Amp5 AMP21 Figure 2 www.irf.com IRAUDAMP21 REV 1.0 Page 5 of 22 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 3Figure7), 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. www.irf.com IRAUDAMP21 REV 1.0 Page 6 of 22 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 10 5 2 1 0.5 0.2 0.1 % 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m 500m 1 2 5 10 20 50 100 W Sweep Trace Color Line Style Thick Data Axis Comment 1 1 1 3 Red Blue Solid Solid 3 3 Anlr.THD+N Ratio Anlr.THD+N Ratio Left Left CH1 CH2 Amp21_22 PWR vs THD.at27 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 10 5 2 1 0.5 0.2 0.1 % 0.05 0.02 0.01 0.005 0.002 0.001 90m 200m 500m 1 2 5 10 20 50 100 200 W Sweep Trace Color Line Style Thick Data Axis Comment 1 1 1 3 Red Blue Solid Solid 3 3 Anlr.THD+N Ratio Anlr.THD+N Ratio Left Left CH1 CH2 Amp21_22 PWR vs THD.at27 Figure 4 www.irf.com IRAUDAMP21 REV 1.0 Page 7 of 22 Frequency Response Test Conditions: VBus = ± 18V Set Output = 1V Load Impedance = 2 ohms +4 +3 +2 +1 -0 -1 d B r -2 A -4 -3 -5 -6 -7 -8 -9 -10 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k 200k Hz Sweep Trace Color Line Style Thick Data Axis Comment 1 1 1 2 Red Blue Solid Solid 3 3 Anlr.Level A Anlr.Level B Left Left CH1 CH2 Amp21_22FR.at27 Figure 5 Noise Floor Test Conditions: VBus = ± 18V Load Impedance = 2 ohms Set Gain = 1% clipping No Input Signal +20 +10 +0 -10 -20 -30 -40 -50 d B V -60 -70 -80 -90 -100 -110 -120 -130 -140 -150 10 20 50 100 200 500 1k 2k 5k 10k 20k Hz Sweep Trace Color Line Style Thick Data Axis Comment 1 1 1 2 Red Blue Solid Solid 3 3 Fft.Ch.1 Ampl Fft.Ch.2 Ampl Left Left CH1 CH2 Amp19FTT,Flloor noise.at27 Figure 6 www.irf.com IRAUDAMP21 REV 1.0 Page 8 of 22 Noise Floor with 1Vrms Output Test Conditions: VBus = ± 18V Output = 1Vrms @ 1 KHz Load Impedance = 2 ohms Set Gain = 1% clipping +0 -10 -20 -30 -40 d B V -50 -60 -70 -80 -90 -100 -110 10 20 50 100 200 500 1k 2k 5k 10k 20k Hz Sweep Trace Color Line Style Thick Data Axis Comment 1 1 1 2 Red Blue Solid Solid 3 3 Fft.Ch.1 Ampl Fft.Ch.2 Ampl Left Left CH1 CH2 Amp21_22_FFT_1V.at27 Figure 7 Efficiency Tested with no heat sink Figure 8 www.irf.com IRAUDAMP21 REV 1.0 Page 9 of 22 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 4Ω load 3Ω load 2Ω load 1/8 Power(W) THD=1% power(W) THD=10% power(W) 9.28 70 90 *9.28 *70 *90 9.88 75 100 *12.29 *95 *120 8.92 70 90 *12.68 *100 *135 *With heatsink www.irf.com IRAUDAMP21 REV 1.0 Page 10 of 22 2) Peak Power duration (no heatsink) Test conditions: 1kHz sine wave signal input ; Both channels driven Fsw=400kHz LoadZ 2Ω 3Ω 4Ω 10%THD PoW 90 120 90 Duration Till Thermal Shutdown Till Thermal Shutdown No Thermal Shutdown 3) Peak Power duration (With heatsink) Test conditions: 1kHz sine wave signal input ; Both channels driven Fsw=400kHz LoadZ 2Ω 3Ω 4Ω www.irf.com 10%THD PoW 135 120 90 Duration No Thermal Shutdown No Thermal Shutdown No Thermal Shutdown IRAUDAMP21 REV 1.0 Page 11 of 22 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. Thermal pad Digikey part# BER161-ND Custom fit Heat Sink 21mm 38mm 56mm BER161-ND Mount heatsink and thermal pad on the back of DB. Drill a hole Extend daughter board’s pins with cables Figure 10 www.irf.com IRAUDAMP21 REV 1.0 Page 12 of 22 Schematic Class D, Daughter Board IR4321 Module Schematic SCH_DB_4321Rev3.2 D5 +18V Bus C7 4.7uF,10V IN+ 2 VSS 8 VAA 12 -18V Bus -B D6 VCC SD C8 CH2 O -B CH1 O +B J2 +B PQFN 2.7k R2 D2 C4 SD SD C2 100R R6 4 VP CH2 VS 1 2 3 4 11 R28 1R CSD 7 10R C22 0.1uF,100V TP2 CH2 O J2B -B COMP 6 10uF, 16V C18 0.1uF -B IN- 5 C6 -5V VSS IN+ C20 0.1uF,100V R18 4.7R GND 3 C12 2.2nF,50V 1nF 2.2nF,50V 1N4148 U2 O SD R8 IN-2 A26568-ND Audio Gnd 2 VAA 2 VSS 8 C10 4.7uF,10V 5 6 7 8 -B A26570-ND CH2 Output to LPF2 VCC VN 620R 10 R10 15 VSS GND2 1 GND2 VCC VCC Audio Gnd 2 10 11 12 CSH 10R 7 8 9 10K C16 22uF D4 12 +5V VAA J1B R32 1N4148 R4 CON EISA31 +18V Bus 4.7uF,10V CH2 IN-2 13 12 IN2 VP C13 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 GND2 11 SD CH1 Output to LPF1 VCC VSS 9 10 VCC A26570-ND -35V Bus 10uF 14 VSS GND2 CH2 O CH2 O CH2O CH2 O -B -B -B -B CH1 O CH1 O CH1 O CH1 O +B +B +B GND +B 4.7R 7 8 13 14 15 16 R15 GND1 VB VAA PWM2 VSS 4.7uF,10V IN-1 5 6 9 10 11 12 R27 1R COM IN1 C9 VS 11 CSD 7 10R 4 -B COMP 6 10uF, 16V -5V VSS 3 GND1 C1 CH1 TP1 CH1 O J2A IN- 5 9 VSS PWM1 SD 100R R5 C5 C21 0.1uF,100V -B VN R1 D1 SD 1 OT C3 0.1uF,100V C17 0.1uF O 4 A26568-ND J1 C19 R17 4.7R GND 3 C11 2.2nF,50V 1nF 2.2nF,50V 1N4148 U1 10 2.7k VAA VB CSH 2 R7 4 5 6 VAA 15 620R COM 1 2 3 VSS 1 R9 IN-1 10K C15 22uF D3 PQFN Audio Gnd 1 VCC J1A 13 14 +5V 10R 9 R3 VAA GND1 +B R31 1N4148 CH1 R16 4.7R C14 -35V Bus -18V Bus 10uF -B Figure 11 Class D, Mother Board Control Volume and Power Supplies Schematic C19 R39 +5V 470 2.2uF,16V C15 R27 R17 +B CLK 47R 33pF 74AHC1G04 Control Volume U3 C5 10uF, 50V R13 CH1 Feedback IN-1 7 6 C108 10nF, 50V 5 VSS 1 VDD VR0 CS VR1 SDATA CLK 1 2 CS 3 SDATAI 47R R8 47R R9 4 SIMUL R7 2 3 10R +5V 4 C1 10uF, 50V 3310S06S 5 6 SCLK R10 47R R11 7 8 MUTE 47R R3 100R 100K U_? ZCEN AINL CS AGNDL SDATAI AOUTL VD+ VA- DGRD VA+ SCLK AOUTR SDATAO AGNDR MUTE CS3310 AINR +5V 16 1 2 3 -5V 9 R14 R4 100R R2 7 8 9 -5V C6 10uF, 50V 10 11 12 VCC SD R56 0.0 1 2 3 4 47R +B R34 47k 1% 1K L2 10uH 74AHC1G04 CH2 OUT D6 CH2 O C24 C28 D8 R48 1uF, 250V R50 2.2k 10, 1W C18 150pF, 500V J4 1 2 OPEN -B R18 C26 22k 0.1uF, 400V U4 R105 10R Q101 FX941 U_6 MC78M12 +5V Power Supply VCC Power Supply Vout VCC Heat Sink HS1 GND Vin Z101 R101 R102 +B U_4 Short 0R, 1W 0R, 1W C105 10uF, 50V Z102 Vout C101 C106 10uF, 50V -5V Power Supply +5V MC78M05 Vin 10uF, 50V R103 U_5 R104 -B D101 MA2YD2300 C102 10uF, 50V 0R, 1W 0R, 1W -5V MC79M05 IN Short GND MMBT5401 4.7K 33pF C32 1000uF,25V -B +B R32 470 C16 C34 OPEN Chassis Gnd R40 R28 R57 100K -B VCC CH2 Feedback IN-2 5 6 7 8 CLK R107 OUT C103 10uF, 50V D102 MA2YD2300 C104 10uF, 50V -B Figure 12 www.irf.com +18V Gnd -18V C31 1000uF,25V J2B CH2 IN 3.3K R72 OPEN 2 1 3 C33 OPEN Trace under J7 J1B C3 10uF, 50V 10 2.2uF,16V Z104 15V J7 +5V R6 11 +5V R106 47K C25 0.1uF, 400V R58 100K 4.7R 4.7R 12 C20 Short +B +B Audio in Q102 -B 13 14 15 16 IR432X_ MODULE -5V + CH1 - OPEN J2A C2 10uF, 50V R5 14 J6 Z103 9 10 11 12 OC R49 2.2k 10, 1W J3 1 2 C27 D7 R47 1uF, 250V J1A 15 13 100K VCC UVP C23 C17 150pF, 500V 4 5 6 CH1 OUT D5 1K CH1 IN R71 OPEN 10uH CH1 O GND R108 8 R1 J5 4.7uF, 16V U_2 R33 47k 1% R55 0.0 C109 +5V C107 4.7uF, 16V L1 R31 3.3K Audio in +5V 22k IRAUDAMP21 REV 1.0 Page 13 of 22 + CH2 - Class D, Mother Board Clock and House Keeping Schematic +B SD R143 SW-3WAY_A-B S3A 10K R147 47k +5V SW S2 1N4148 R110 100k C112 1200pF, 50V 100pF, 50V C111 +5V 47k D105 R138 R112 820R 4.7k CStart OT R148 10k VCC 1Y 6A 2A 6Y 2Y 5A 3A 5Y 3Y 4A GND 4Y DCP R145 47K R144 UVP 10k Q109 Q110 MMBT5551 R141 47k MMBT5551 U_3 1A R146 47K Q103 SW-3WAY_A-B -B 5K POT SW R136 68k R116 47R R114 100R Z108 8.2V 74HC14 10nF, 50V Q108 +5V J8 BNC A24497 R118 1k EXT. CLK NORMAL MUTE R125 10K Q106 R134 10k R126 100K MMBT5401 Q105 R137 MMBT5551 R130 47K 47k R119 1k Trip and restart OVP +B R135 82k MMBT5551 R115 47R 10uF, 50V C114 CLK CLK S1 C119 SW-PB 0.1uF, 50V C115 S E I S3B 100pF, 50V R113 CH1 O C113 MMBT5551 Z107 10V R149 47K Z105 27V 1N4148 D107 C117 1N4148 100uF, 16V R120 100R R111 10K R140 10k R139 Z106 18V OT SP MUTE D103 C110 R142 68k D106 1N4148 MMBT5401 SW_H-L R109 1K 1nF, 50V 1 2 DC protection PROTECTION CH2 O I E S Q111 DCP D104 1N4148 MUTE R117 R131 47K -5V R128 6.8k R124 10k Q104 47R R122 47k C116 100uF, 16V R121 47k R123 DC_PS 1K R150 +B 47k MMBT5401 R151 47k R129 6.8k R133 47k Q112 MMBT5551 R127 6.8k Q107 1 2 3 Z109 8.2V -5V +5V MMBT5551 R132 47k 6 5 4 J9 2 1 PVT412 P1 -B . Figure 13 www.irf.com IRAUDAMP21 REV 1.0 Page 14 of 22 Bill of Materials IRAUDAMP21 Daughter Board BOM No Part Number Designator 1 445-1601-1-ND C1, C2 2 445-1309-1-ND C3, C4, C5, C6 3 587-1442-1-ND C7, C8, C9, C10 4 478-1215-1-ND C11, C12 5 399-4939-1-ND C13, C14 6 445-6797-1-ND C15, C16 7 311-1140-1-ND C17, C18 8 478-1529-1-ND C19, C20, C21, C22 9 1N4148WS-FDICT-ND D1, D2 10 1N4148W-FDICT-ND D3, D4, D5, D6 11 A26568-ND J1A, J1B 12 J2A, J2B 15 A26570-ND RMCF0603JT100RCTND RMCF0603JT10R0CTND RMCF0603FT2K70CTND 16 311-620GRCT-ND R9, R10 17 311-4.7GRCT-ND R15, R16, R17, R18 18 311-1.0GRCT-ND RMCF0603JT10K0CTND R27, R28 13 14 19 R1, R2 R3, R4, R5, R6 R7, R8 R31, R32 Description CAP CER 10UF 16V 20% X7R 1206 CAP CER 2200PF 50V 10% X7R 0603 CAP CER 4.7UF 10V 10% X7R 0805 CAP CER 1000PF 50V 10% X7R 0603 CAP CER 10UF 16V 20% X7R 1206 CAP CER 22UF 16V 10% X5R 0805 CAP CER 0.1UF 50V 10% X7R 0805 CAP CER 0.1UF 100V 10% X7R 1206 DIODE SWITCH 75V 200MW SOD323 DIODE SWITCH 100V 400MW SOD123 CONN HEADER VERT 6POS .100 30AU CONN HEADER VERT .100 8POS 30AU RES 100 OHM 1/10W 5% 0603 SMD RES 10 OHM 1/10W 5% 0603 SMD RES 2.7K OHM 1/10W 1% 0603 SMD RES 620 OHM 1/10W 5% 0603 SMD RES 4.7 OHM 1/10W 5% 0603 SMD RES 1.0 OHM 1/10W 5% 0603 SMD RES 10K OHM 1/10W 5% 0603 SMD Quantity 20 IR4321 U1, U2 PowIRaudio integrated Class D IC *Heatsink is an option for IRAUDAMP21 to deliver high power up to 135W/2Ω Vendor 2 Digikey 4 Digikey 4 Digikey 2 Digikey 2 Digikey 2 Digikey 2 Digikey 4 Digikey 2 Digikey 4 Digikey 2 Digikey 2 Digikey 2 Digikey 4 Digikey 1 Digikey 2 Digikey 4 Digikey 2 Digikey 2 Digikey 2 IR IRAUDAMP21 Mother Board BOM NO Part No Designator Description 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 C107, C109 CAP CER 4.7UF 16V 10% X5R 0805 2 Digikey 1 565-1106-ND 10 PCC2323CT-ND www.irf.com IRAUDAMP21 REV 1.0 # Vender Page 15 of 22 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 2 Digikey 16 1N4148W-FDICT-ND C116, C117 CAP ALUM 100UF 16V 20% RADIAL D103, D104, D105, D106, DIODE SWITCH 100V 400MW D107 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 1 Digikey 20 A32934-ND J1A, J1B HEATSINK HORZ SIX BLACK TO-220 CONN RECEPT 6POS .100 VERT DUAL CONN RECEPT 8POS .100 VERT DUAL CONN TERM BLOCK 2POS 9.52MM PCB 2 Digikey 2 Digikey Digikey Mouser or or 1 Digikey Digikey Mouser 1 Digikey 1 7G17A-100M-B Digikey Inductors, Inc Inductors, Inc 911-1D17A-100M Mouser 21 A32935-ND 277-1271-ND 22 1714971 or J2A, J2B 23 CP-1422-ND 277-1272-ND 24 1714984 or 651J3, J4 J5, J6 25 A32248-ND J8 26 ED1567 J9 CONN RCA JACK R/A BLUE PCB CONN TERM BLOCK 3POS 9.52MM PCB CONN JACK BNC R/A 50 OHM PCB TIN TERMINAL BLOCK 7.50MM VERT 2POS 27 7G17A-100M-R L1, L2 Class D inductor, 10uH 651J7 28 160-1143-ND NORMAL 29 PVT412PBF-ND P1 30 160-1140-ND PROTECTION 31 FCX491CT-ND Q101 2 2 2 LED 3MM GREEN TRANSPARENT IC RELAY PHOTOVO 400V 140MA 6DIP LED 3MM HI-EFF RED TRANSPARENT 1 Digikey 1 Digikey 1 Digikey 1 Digikey 4 Digikey 7 Digikey 34 P100KACT-ND TRANSISTOR NPN 60V 1A SOT-89 TRANS PNP 150V 350MW SMD Q102, Q104, Q106, Q111 SOT23-3 Q103, Q105, Q107, Q108, TRANS NPN 160V 350MW SMD Q109, Q110, Q112 SOT23-3 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 2 Digikey 37 P47ACT-ND R5, R6 RESISTOR 4.7 OHM 1/4W 5% 1206 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 2 Digikey 41 P47KACT-ND R17, R18 RES 22K OHM 1/8W 5% 0805 SMD R106, R121, R122, R130, R131, R132, R133, R137, R139, R141, R145, R146, RES 47K OHM 1/8W 5% 0805 SMD R147, R149, R150, R151 16 Digikey 42 P0.0ACT-ND R55, R56 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 32 MMBT5401-FDICT-ND 33 MMBT5551-FDICT-ND RES 0.0 OHM 1/8W 0805 SMD 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 www.irf.com IRAUDAMP21 REV 1.0 Page 16 of 22 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 1 Digikey 53 P10KACT-ND R108 POT 10K OHM 1/8W CARB VERTICAL 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 2 Digikey 59 P8010S-ND S1 RES 68K OHM 1/8W 5% 0805 SMD 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 2 Digikey 63 73C8016 or 72J5420 U_1 IC SNGL INVERTER GATE SOT23-5 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 1 Digikey 66 MC78M05CTGOS-ND U_4 1 Digikey 67 LM79M05CT-ND U_5 IC HEX SCHMITT-TRIG INV 14-SOIC IC REG VOLT POS 500MA 5V TO220AB IC VOLT REG NEG 5V 500MA TO2203 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 1 Newark 77 82K6096 Volume Knob ROUND KNURLED KNOB, 6MM Thermally TO-220 mounting kit with screw THERMALLOY - 4880G - Mounting Kit 3 Newark 78 8401K-ND 1/2" Standoffs 4-40 5 Digikey 79 H724-ND 4-40 Nut 80 H729-ND No. 4 Lock Washer *Tachyonix Corporation, http://www.tachyonix.co.jp www.irf.com STDOFF HEX M/F 4-40 .500"L ALUM NUT HEX 4-40 STAINLESS STEEL 5 Digikey WASHER LOCK INTERNAL #4 SS 5 Digikey IRAUDAMP21 REV 1.0 Page 17 of 22 PCB Specifications 1. 2. 3. 4. 5. 6. Two Layers SMT PCB with through holes 1/16 thickness 2/0 OZ Cu FR4 material 10 mil lines and spaces 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. www.irf.com IRAUDAMP21 REV 1.0 Page 18 of 22 Daughter Board Figure 14 Figure 15 www.irf.com IRAUDAMP21 REV 1.0 Page 19 of 22 Mother Board Figure 16 www.irf.com IRAUDAMP21 REV 1.0 Page 20 of 22 Figure 17 www.irf.com IRAUDAMP21 REV 1.0 Page 21 of 22 Revision changes descriptions Revision Rev 1.0 Changes description Released Date 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 www.irf.com IRAUDAMP21 REV 1.0 Page 22 of 22