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www.irf.com page 1 of 22 IRAUDAMP21 rev 1.0 IRAUDAMP21 90w/2 ? 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 page 2 of 22 IRAUDAMP21 rev 1.0 table of contents ........................................................ page introduction................................................................................................................... ............................ 3 ? specificat ions ................................................................................................................. ........................... 3 ? connector d escription .......................................................................................................... ............... 5 ? test proc edures................................................................................................................ ....................... 6 ? performance and test g raphs .................................................................................................... ...... 7 ? thermal info rmation ............................................................................................................ ................ 10 ? schematic ...................................................................................................................... ............................. 13 ? bill of ma terials .............................................................................................................. ...................... 15 ? pcb specifi catio ns ............................................................................................................. .................... 18 ? revision chang es descri ptions.................................................................................................. ...... 22 ?
www.irf.com page 3 of 22 IRAUDAMP21 rev 1.0 introduction the IRAUDAMP21 reference design is a two-channel, 90w/ch (2 ? /18v; no heatsink)/ 135w/ch (2 ? /22v; *with heatsink) half-brid ge 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 2 ? load; no heatsink), 135w x 2 channels (10%thd+n 2 ? 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 othe rwise noted) notes / conditions 12v~18v bipolar power supply; without heatsink supply voltages 12v~22v bipolar power supply; *with heatsink load impedance 4-2 ? resistive load self-oscillating frequency 400kh z 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, 4 ? load, without heatsink 70w 1khz, 4 ? load, *with heatsink 90w 1khz, 3 ? load, without heatsink 90w 1khz, 3 ? load, *with heatsink 70w 1khz, 2 ? load, without heatsink output power ch1-2: (1% thd+n) 100w 1khz, 2 ? load, *with heatsink
www.irf.com page 4 of 22 IRAUDAMP21 rev 1.0 90w 1khz, 4 ? load, without heatsink 90w 1khz, 4 ? load, *with heatsink 120w 1khz, 3 ? load, without heatsink 120w 1khz, 3 ? load, *with heatsink 90w 1khz, 2 ? load, without heatsink output power ch1-2: (10% thd+n) 135w 1khz, 2 ? load, *with heatsink rated load impedance 4-2 ? resistive load idling supply current 70ma no input signal total idle power consumption 2.4w no input signal distortion 0.016% thd+n @ 40w, 2 ? 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
www.irf.com page 5 of 22 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 ch1 ab gen power supply +/- 35v ch2 + + amp5 + - ch2 db_209_rev 2.0 4 ohms 4 ohms audio precision bal inputs ir4321 _ db +/-18v * amp21 * with heatsink power supply can go up to +/-22v 2 2
www.irf.com page 6 of 22 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 v rms input generates an output around thd+n=1% power level. 16. sweep the audio signal voltage from 15 mv rms to 1 v rms . 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 page 7 of 22 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 color sweep trace line style thick data axi s comment 1 1 red solid 3 anlr.thd+n ratio left ch1 1 3 blue solid 3 anlr.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 100 200m 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 color sweep trace line style thick data axi s comment 1 1 red solid 3 anlr.thd+n ratio left ch1 1 3 blue solid 3 anlr.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 200 200m 500m 1 2 5 10 20 50 100 w figure 4
www.irf.com page 8 of 22 IRAUDAMP21 rev 1.0 frequency response test conditions: vbus = 18v set output = 1v load impedance = 2 ohms amp21_22fr.at27 color sweep trace line style thick data axi s comment 1 1 red solid 3 anlr.level a left ch1 1 2 blue solid 3 anlr.level b left ch2 -10 +4 -9 -8 -7 -6 -5 -4 -3 -2 -1 -0 +1 +2 +3 d b r a 20 200k 50 100 200 500 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 color sweep trace line style thick data axi s comment 1 1 red solid 3 fft.ch.1 ampl left ch1 1 2 blue solid 3 fft.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 20k 20 50 100 200 500 1k 2k 5k 10k hz figure 5 figure 6
www.irf.com page 9 of 22 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 color sweep trace line style thick data axi s comment 1 1 red solid 3 fft.ch.1 am pl left ch1 1 2 blue solid 3 fft.ch.2 am pl left ch2 -110 +0 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 d b v 10 20k 20 50 100 200 500 1k 2k 5k 10k hz efficiency tested with no heat sink figure 8 figure 7
www.irf.com page 10 of 22 IRAUDAMP21 rev 1.0 thermal information 1) 1/8 po thermal information for IRAUDAMP21 conditions: ? tamb=25c natural convection cooling ? both channel driven 1/8po continuous 30minus ? temperature measured by infrared camera ? measuring temperature point: ir4321?s temperature saturated 85c within 30minutes figure 9 load impedance 1/8 power(w) thd=1% power(w) thd=10% power(w) 9.28 70 90 4 ? load * 9.28 * 70 * 90 9.88 75 100 3 ? load * 12.29 * 95 * 120 8.92 70 90 2 ? load * 12.68 * 100 * 135 * with heatsink
www.irf.com page 11 of 22 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 2? 90 till thermal shutdown 3? 120 till thermal shutdown 4? 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 2? 135 no thermal shutdown 3? 120 no thermal shutdown 4? 90 no thermal shutdown
www.irf.com page 12 of 22 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
www.irf.com page 13 of 22 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 -3 5v bu s vaa vss in-1 ch1 o +b ch1 c13 10uf c19 0. 1uf, 100v 22uf c15 tp1 clas s d, daughte r board ir4321 module sche matic 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 -3 5v bu s c14 10uf c20 0. 1uf, 100v 22uf c16 r8 2. 7k in-2 gnd2 audio gnd 2 sd vss vcc 7 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 pw m1 3 vss 2 vcc 10 sd 11 ot 1 vss 8 pw m2 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 -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 co m 9 cs h 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 -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 ope n c26 0.1uf, 400v c28 ope n l2 10uh r48 10, 1w r34 1k r33 1k c18 150pf, 500v c17 150pf, 500v ch1 out ch2 out ch2 in ch1 in 1 2 j4 c33 ope n c34 ope n 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 mut e c25 0.1uf, 400v r47 10, 1w c15 33pf u3 74ahc1g04 u4 74ahc1g04 c19 2.2uf,16v c20 2.2uf,16v r27 47r r28 47r c23 1uf, 250v c24 1uf, 250v -5v +5v +5v +5v c5 10uf, 50v c6 10uf, 50v +5v clk clk d5 d7 d8 d6 -b +b -b +b -b +b ch1 o +b ch2 o -b sd in-1 vcc 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 sdat ai c109 4.7uf, 16v cs +5v control volume r55 0.0 r56 0.0 ir432x_ module ch1 feedback ch2 feedback +5v audio in 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 vi n 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 vi n gnd vout u_6 mc78 m12 z103 short q102 mmbt5401 r107 4.7k r106 47k z104 15v q101 fx941 vcc +b -b hs1 vcc p o we r sup p l y +5 v p o we r sup p l y - 5 v p o we r sup p l y r71 ope n r72 ope n clas s d, mothe r board control volume and powe r supplie s sche matic 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 mut e 8 ainl 16 agndr 10 aout l 14 va- 13 va+ 12 aout r 11 agndl 15 ainr 9 u_? cs3310 trace under j7 chassis 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 mut e 1 2 3 6 5 4 p1 pvt412 1 2 j9 dc_ps mut e 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 mmbt 5551 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 sw s3b sw-3way_a-b ext. clk a24497 j8 bnc r115 47r r114 100r r113 5k pot r112 820r c111 100pf, 50v q103 mmbt 5551 2 1 s2 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 dcp r127 6.8k r128 6.8k r130 47k r131 47k r148 10k r147 47k q111 mmbt5401 +b r149 47k c119 0. 1uf, 50v uvp z108 8.2v r137 47k -5v ot ot cstart q112 mmbt5551 -5v +5v z109 8.2v r150 47k r151 47k +b class d, mother board clock and house keeping schematic . 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/2 ? 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
www.irf.com page 16 of 22 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
www.irf.com page 17 of 22 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.
www.irf.com page 19 of 22 IRAUDAMP21 rev 1.0 daughter board figure 14 figure 15
www.irf.com page 20 of 22 IRAUDAMP21 rev 1.0 mother board figure 16
www.irf.com page 21 of 22 IRAUDAMP21 rev 1.0 figure 17
www.irf.com page 22 of 22 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, ca lifornia 90245 tel: (310) 252-7105 data and specifications su bject to change without notice. 05/08/2013

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