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tripath technology, inc. - technical information 1 EB-TA2041 ? jl/rev. 1.1/01.03 EB-TA2041 class-t digital audio amplifier 4 channel ta2041 evaluation board technical information ? board revision 2.1 revision 1.1 ? january 2003 general description the EB-TA2041 revision 2.0 is a 4-channel evaluation board based on the ta2041 digital audio power amplifier chipset from tripath technology. this board is designed to provide a simple and straightforward env ironment for the evaluation of the ta2041 amplifier driver. for additional document ation on the ta2041, see the ta2041 data sheet. applications automotive head units dvd receivers multimedia speaker systems benefits 4-channel (280w) solution ? with integrated fets - in a single 32-pin ssip package high fidelity, high efficiency class-t low external component count single-supply operation features class-t architecture four h-bridge outputs ?audiophile? sound quality high power @20.0v 70w sat. sq. wave @ 4 ? 50w @ 4 ? , 10% thd+n ?audiophile? quality sound 0.04% thd+n @ 30w 4 ? 0.18% ihf-im @ 5w 4 ? high efficiency 89% @ 25w 8 ? 85% @ 50w 4 ? am ?low emi? mode pop-free startup and shutdown high dynamic range mute and stand-by function automatic dc offset trim clip detection output protection modes: output short to vpp and ground output short across load fortuitous open ground load dump protection over-/under-voltage protection over-current protection over-temperature protection low noise floor: <135uv a-weighted
tripath technology, inc. - technical information 2 EB-TA2041 ? jl/rev. 1.1/01.03 operating instructions board connection diagram j13 out 4 (+) j14 out 4 (-) j11 out 3 (+) j12 out 3 (-) j9 out 2 (+) j10 out 2 (-) j4 out 1 (+) j6 out1 (-) j2 gnd j1 vpp sleep am mute j24 d24 d22 d20 d19 d21 d23 j25 j21 j22 j23 jp1 test port d18 d17 ta2041 top-in1 bot-in3 top-in2 bot-in4 jreg ga vpp vreg vpp gnd gnd muteb am sleep hmuteb ovrldb fault vreg vpp + - + - + - + - + - audio source out1, ga out3, ga out2, ga out4, ga power supplies the EB-TA2041 operates on a single supply voltage (vpp referenced to gnd) ranging from 9.5-21v. the vpp and gnd connectors are standard female banana jacks. the vpp led will glow green when the vpp supply is on. please refer to the board connec tion diagram for the connector locations on the eb- ta2041. the EB-TA2041 has an on board 3.3v regul ator (u2) that operates off of the vpp rail. it produces vreg referenced to ga. the vreg jumper connects the on board 3.3v regulator to the rest of the circuit. it must be shorted for normal operation. it can be opened for use with an external 3.3-5v power supply. j25 connects pin 7 of j24 to vreg. this allows an external control fixture connected to j24 to supply vreg to the board instead of the on board regulator. the vreg led will glow green when vreg is powered up. the vreg ground (ga) must not be connected exter nally to the vpp ground (gnd). gnd and ga are joined at a common point on the EB-TA2041 with a trace. outputs the output connections for each channel of the eb- ta2041 are made with standard female banana jacks. the output of the ta2041 is differential; therefore ea ch output has a positive output and a negative output.
tripath technology, inc. - technical information 3 EB-TA2041 ? jl/rev. 1.1/01.03 do not short the negative outputs to ground. do not ground one side of t he speaker. please refer to the board connection diagram for the co nnector locations on the EB-TA2041. inputs the input connection for each channel of the eb-ta20 41 is a female rca jack. the rca connectors are labeled in1 through in4. these inputs share a common ground referenced to ga. please refer to the board connection diagram for the co nnector locations on the EB-TA2041. logic signals the ta2041 has six logic signals. muteb, am , and sleep are inputs. hmuteb, ovrldb, and fault are outputs. the EB-TA2041 has led?s conn ected to each of the six logic signal s: the muteb led will glow red when the muteb signal is driven active low by the mute switch. the am led will glow yellow when the am signal is driven active high by the am switch. the sleepb led will glow red when the sleepb signal is driven active low by the sleep switch. each logic signal has a test pin connected to it. these test pins are located next to the corresponding signal?s led. j24 may be used to connect an external microcontrolle r to the logic signals. if driving the input signals externally, r4, r6 and r8 should be removed to preven t bus contention with the switches. please refer to the schematic for details. please refer to the ta2041 data sheet for a complete des cription of the logic signals. please refer to the board connection diagram for the led and connector locations on the EB-TA2041. amplifier gain the gain of the ta2041 is internally set to 26db. test port jp1 is a test port for internal testing. it is not suppor ted. j21, j22, and j23 are for internal testing and must be left open. performing measurements on the EB-TA2041: the ta2041 operates by generating a high frequency switching signal based on the audio input. this signal is sent through a low-pass filter that recovers an amplified version of the audio input . the frequency of the switching pattern is spread spectrum in nature and typically varies between 100khz and 1mhz, which is well above the 20hz ? 20khz audio band. t he pattern itself does not alter or distort the audio input signal, but it does introduce some inaudible components. the measurements of certain performance parameters, pa rticularly noise related specifications such as thd+n, are significantly affected by the design of the low-pass filter used on the output as well as the bandwidth setting of the measurement in strument used. unless the filter has a very sharp roll-off just beyond the audio band or the bandwidth of the measurem ent instrument is limited, some of the inaudible noise components introduced by the ta2041 amplifier sw itching pattern will degrade the measurement by including out of band (audio) energy.
tripath technology, inc. - technical information 4 EB-TA2041 ? jl/rev. 1.1/01.03 one feature of the ta2041 is that it does not requi re large multi-pole filters to achieve excellent performance in listening tests, usually a more cr itical factor than performance measurements. though using a multi-pole filter may remove high-frequenc y noise and improve thd+n type measurements (when they are made with wide-bandwidth measuring e quipment), these same filters degrade frequency response. the EB-TA2041 has a simple two-pole output filt er with excellent performance in listening tests. (see application note 4 for additional information on bench testing)
tripath technology, inc. - technical information 5 EB-TA2041 ? jl/rev. 1.1/01.03 EB-TA2041 schematic in3 l4 10uh, 5a fault d3 murs120t3 c12 680uf;35v d13 murs120t3 c6 0.1uf vpp ovrldb t12 off vreg c38 0.1uf;ns vpp c8 0.1uf hmuteb am c39 0.1uf;ns ovrldb gnd j2 r13 100k lh4 ledhigh v5 g5 in vreg for tripath use only do not stuff vpp fault c11 0.1uf t5 vreg am out3n on 2.1 ta2041 eval board rev 2.1 c 17 wednesday, january 22, 2003 title size document number rev date: sheet of c27 0.47uf close to pin18 d1 murs120t3 vpp r12 100k c15 0.1uf c33 0.1uf banana r14 1.8k t10 hmuteb off in2 d10 murs120t3 d25 1n4148wsct-nd;ns vpp *connect agnd to pgnd using a single trace.* vreg vreg t11 jreg note: amp gain is internally fixed at 26db c13 680uf;35v am d6 murs120t3 l8 10uh, 5a c25 0.47uf r4 1k muteb l9 ns am mode out4p j19 bracket 1 banana vpp in4 fault r11 100k j25 sleepb ovrldb j22 c19 0.47uf sleepb out2n sw2 2 1 3 c5 3.3uf tripath technology, inc. (sda) d16 murs120t3 r18 750 molex 71565;ns c1 0.1uf c34 0.1uf j16 standoff 1 c20 0.47uf cpump vreg sleepb dcap2 d7 murs120t3 vpp out3n j12 off vpp r15 1.8k c36 3.3uf banana pgnd banana out2p j9 c31 0.47uf c24 0.47uf t6 vpp t1 vreg sleepb close to pin28 vpp out1n l3 10uh, 5a d5 murs120t3 vpp (sda) out4p j13 muteb t4 l2 10uh, 5a sw3 2 1 3 on mute wht red j26 4rca 1 2 3 4 5 6 banana r17 6.2k r7 10;2w r6 1k c2 0.1uf d2 murs120t3 c22 0.47uf l1 10uh, 5a vpp r3 220 cpump d26 1n4148wsct-nd;ns agnd hmuteb c29 0.47uf d17 led;green;67-1343-1-nd 2 1 am out1p j4 out4n j14 vreg j21 c4 0.1uf j17 standoff 1 hmuteb c35 0.1uf t7 heatsink supports d4 murs120t3 j23 d18 led;green;67-1343-1-nd 2 1 ll2 ledlow in v5 g5 muteb l6 10uh, 5a c37 3.3uf u2 lm3480im3 3 1 2 gnd vout vin banana j15 standoff 1 r2 10;2w on d14 murs120t3 t3 (scl) vpp muteb c32 0.1uf j24 header;4x2;.100 1 2 3 4 5 6 7 8 d8 murs120t3 ll3 ledlow in v5 g5 u1 ta2041 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2 in1 in3 in4 biascap sleepb am ovrldb muteb agnd 5vgen hmuteb vppa agnd cpump out4p vpp4 pgnd34 out4n out3n vpp3 out3p fault out2p vpp2 out2n out1n pgnd12 vpp1 out1p dcap2 dcap1 in2 out2n j10 vreg out4n c3 0.1uf this path must be low impedance vppj ll5 ledlow in v5 g5 vreg c14 0.1uf c10 3.3uf c21 0.47uf t8 sleep sw1 2 1 3 banana c28 0.47uf v5gen ovrldb c18 0.47uf vpp d9 murs120t3 out1n j6 c17 0.47uf d12 murs120t3 banana lh1 ledhigh v5 g5 in vpp out3p j11 r9 51k c26 0.47uf close to pin28 r5 10;2w j18 standoff 1 c23 0.47uf l5 10uh, 5a close to pin18 (scl) make this led yellow ll6 ledlow in v5 g5 r1 10;2w c16 0.47uf r10 100k vpp j1 t2 biascap vpp jp1 gd sda vd scl j20 bracket 1 banana vpp out2p d11 murs120t3 c7 0.1uf dcap1 in1 out3p out1p l7 10uh, 5a c9 0.1uf d15 murs120t3 t9 r8 1k c30 0.47uf banana
tripath technology, inc. - technical information 6 EB-TA2041 ? jl/rev. 1.1/01.03 d19 led;red;67-1342-1-nd 2 1 r19 510 v5 in g5 v5d q1 bss123ct-nd 1 3 2 q2 bss84ct-nd 1 3 2 v5 v5d in r20 510 d20 led;red;67-1342-1-nd 2 1 g5 g5 d21 led;red;67-1342-1-nd 2 1 r21 510 v5 q3 bss84ct-nd 1 3 2 in v5d lh1 block ll2 block ll3 block g5 in v5 q4 bss123ct-nd 1 3 2 v5d d22 led;yellow;67-1344-1-nd 2 1 r22 510 v5 r23 510 v5d g5 q5 bss84ct-nd 1 3 2 d23 led;red;67-1342-1-nd 2 1 in v5d g5 d24 led;red;67-1342-1-nd 2 1 q6 bss84ct-nd 1 3 2 in v5 r24 510 lh4 block ll5 block ll6 block
tripath technology, inc. - technical information 7 EB-TA2041 ? jl/rev. 1.1/01.03 ta2041 eval board rev 2.1 revised: wednesday, january 22, 2003 revision: 2.1 all capacitors are 10% tolerance unless otherwise noted. all resistors are 5% tolerance 1/10w unless otherwise noted. bill of materials january 22,2003 17:53:14 item qty reference part pcb footprint manufacture r manufacturer part # source source part # 1 15 c1,c2,c3,c4,c6,c7,c8,c9, 0.1uf 1206 panas onic ecj-3vb1h104k digikey pcc104bct-nd c11,c14,c15,c32,c33,c 34, c35 2 1 c5 3.3uf cap3216 panasonic ecs-t1ay335r digikey pcs2335ct-nd 3 1 c10 3.3uf cap3528 panasonic ecs-t1ex335r digikey pcs5335ct-nd 4 2 c12,c13 680uf;35v cape\300\630 panas onic eeu-fc1v681s digikey p10303-nd 5 4 c16,c18,c21,c22 0.47uf cap3216 panason ic ecj-3yb1e474k digikey pcc1891ct-nd 6 12 c17,c19,c20,c23,c24,c25, 0.47uf cap200f panasonic ecq-v1h474jl digikey p4671-nd c26,c27,c28,c29,c30, c31 7 2 c36,c37 3.3uf cape\80\200 panas onic eeu-fc1h3r3 digikey p10314-nd 8 2 c38,c39 0.1uf;ns 1206 panasonic ec j-3vb1h104k digikey pcc104bct-nd 9 16 d1,d2,d3,d4,d5,d6,d7,d8, murs120t3 diode_mbrs 130t3 diodes inc murs120-13 digikey murs120dict-nd d9,d10,d11,d12,d13,d14, d15,d16 10 2 d17,d18 led;green;67-1343-1-nd ledsmt lumex opto/components inc. ccl-crs10g digikey 67-1343-1-nd 11 5 d19,d20,d21,d23,d24 le d;red;67-1342-1-nd ledsmt lumex opto/com ponents inc. ccl-crs10r digikey 67-1342-1-nd 12 1 d22 led;yellow;67-1344-1-nd ledsmt lumex opto/c omponents inc. ccl-crs10y digikey 67-1344-1-nd 13 2 d26,d25 1n4148wsct-nd;ns sod-123 diodes inc. 1n4148ws-7 digikey 1n4148wsct-nd 14 1 jp1 molex_shield _recep;pn51565;ns molex71565 molex 71565 force electronics mol15-83-0064 15 5 j21,j22,j23,j25,jreg header ;2pin_sip sip-2p 16 1 j1 vpp banana_plt_a johnson components 108-0740-001 digikey j147-nd 17 1 j2 gnd banana_plt_a johnson components 108-0740-001 digikey j147-nd 18 1 j4 out1p banana_plt_a johnson components 108-0740-001 digikey j147-nd 19 1 j6 out1n banana_plt_a johnson components 108-0740-001 digikey j147-nd 20 1 j9 out2p banana_plt_a johnson components 108-0740-001 digikey j147-nd 21 1 j10 out2n banana_plt_a johnso n components 108-0740-001 digikey j147-nd
tripath technology, inc. - technical information 8 EB-TA2041 ? jl/rev. 1.1/01.03 22 1 j11 out3p banana_plt_a johnso n components 108-0740-001 digikey j147-nd 23 1 j12 out3n banana_plt_a johnso n components 108-0740-001 digikey j147-nd 24 1 j13 out4p banana_plt_a johnso n components 108-0740-001 digikey j147-nd 25 1 j14 out4n banana_plt_a johnso n components 108-0740-001 digikey j147-nd 26 4 j15,j16,j17,j18 standoff standoff_440 27 2 j19,j20 bracket 8190k digikey 8190k-nd 28 1 j24 header;4x2;.100 ju mper4x2g 29 1 j26 4rca rcj-41xxxx digikey cp-1438-nd 30 8 l1,l2,l3,l4,l5,l6,l7,l8 10uh, 5a tor675x3 00 american cores - julie yuan - (714)850-4660 aw600-06-40t-24-v american cores - julie yuan - (714)850-4660 aw600-06-40t-24-v 31 1 l9 ns 1206 32 2 q4,q1 bss123ct-nd sot23_fc 33 4 q2,q3,q5,q6 bss84ct-nd sot23_fc 34 4 r1,r2,r5,r7 10;2w resv150 p anasonic yageo digikey p10w-2bk-nd 35 1 r3 220 res0805 36 3 r4,r6,r8 1k res0805 37 1 r9 51k res0805 38 4 r10,r11,r12,r13 100k res0805 39 2 r14,r15 1.8k res0805 40 1 r17 6.2k res0805 41 1 r18 750 res0805 42 6 r19,r20,r21,r22,r23,r 24 510 res0805 43 3 sw1,sw2,sw3 sw spdt sw_et01 ck corp et01sd1cbe digikey ckn1071-nd 44 12 t1,t2,t3,t4,t5,t6,t7,t8, tp sip-1p_loop digikey 5011k-nd t9,t10,t11,t12 45 1 u1 ta2041 ta2041 tripath ta2041 46 1 u2 lm3480im3 sot23 national semi lm3480im3-3.3 digikey lm3480im3-3.3ct-nd
tripath technology, inc. - technical information 9 EB-TA2041 ? jl/rev. 1.1/01.03
tripath technology, inc. - technical information 10 EB-TA2041 ? jl/rev. 1.1/01.03
tripath technology, inc. - technical information 11 EB-TA2041 ? jl/rev. 1.1/01.03
tripath technology, inc. - technical information 12 EB-TA2041 ? jl/rev. 1.1/01.03
tripath technology, inc. - technical information 13 EB-TA2041 ? jl/rev. 1.1/01.03 contact information world wide sales offices united states & europe se asia & china japan & korea graham wright eugene hsu osamu ito graham@tripath.com ehsu@tripath.com ito@tripath.com 408.750.6820 886.2.2653.7428 81.42.334.2433 tripath technology, inc 2560 orchard parkway san jose, ca 95131 408.750.3000 www.tripath.com

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