lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2002 rev. 0.2b, 2002-11-04 lxe1722-150 audiomax evaluation kit user?s guide integrated products
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2002 rev. 0.2b, 2002-11-04 lxe1722-150 evaluation bo ard quick start guide the lxe1722-150 evaluation board is a fully functional stereo class-d amplifier. connection to a single power supply, two speakers, and an audio source is all that is required to begi n evaluating the amplifier. the amplifier will support continuous output power levels up to >110w x 2 into 2 ohm load (<1% thd+n). board setting 1. power and ground connections: the terminal jp1 is for the power supply connection. vcc is connected to the positive polarity of the power supply or battery (+7v ~ +25v ); the gnd is connected to the negative polarity of the power supply or battery. please make sure your power supply polarity connection and supply voltage is correct before you start to evaluate the board. 2. speakers connections: jp5 and jp6 are the speaker outputs. jp5 is for the left channel (ch1) and jp6 is for the right channel (ch2). connect speaker ?+ ? and ?-? to ?lout+/rout+? and ?l out-/rout-? of jp5/jp6. this evaluation board is designed for standard 4 ohm speaker lo ads. for different impedance speakers, the output filter values should be modified to optimize the output frequ ency response. please see audiomax design resource (an-16) for lc filter values. 3. audio input connections: jp2, jp2a, rca1 and rca2 are the audio input connections. jp2/jp2a support differential audio inputs, and rca1/rca2 are for the single-ended audio inputs. when audio inputs are differential, the positive audio inputs are connected to lin+/rin+ pin, while the negative i nputs are connected to lin-/rin- pin of the jp2/jp2a terminals. j1 and j2 jumpers are left op en when using differential inputs. when audio inputs are single-ended, the inputs audio source can either be connec ted to terminal jp2/jp2a, or to rca1/rca2. in this single-ended connection, jumpers j1 and j2 must be closed so that the lin-/rin- audi o inputs are connected to ground. 4. sleep/mute connections: jp4 is th e jumper selection for on/off of sleep and mute functions. to enable the amplifier, both jumpers should be set to ?off? (sleep is off, and mute is off). 5. pre-amp output connections: jp3 is the header for stereo, single-ended pre-amp outputs, ?lpreout ? gnd ? rpreout?. these outputs are provided to drive other crossover networks or to support additional power amplifiers such as for a subwoofer speaker system.
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2002 rev. 0.2b, 2002-11-04 application schematic g1 ch ass is_g nd 1 1 pg nd rn - l6 sp l5 028 -10 0m c9 22 pf rfbk - rp w m+ c2 5 47 00 pf ri sn jp 4 he ader 3x 2 12 34 56 cp wm rp re ou t q7 rfp1 0p0 3l lfbk + c7 10 0p f c1 1 22 pf vcc lp - c2 9 0.68u f/5 0v q4 sup7 0n03- 09b p ch ass is_g nd jp 2 he ader 2 1 2 c6 0.47u f of f r4 10 k c10 100pf fi lter 3 chok e cm 1 2 3 4 c3 8 0.1uf/25 v c3 0 0.68u f/5 0v ri n+ rfbk + c5 0.47u f l1 00 fe rrite /sm l1 15 uh r8 5.1/1w vcc c12 100pf c3 0.47u f lo ut+ lisn vcc j2 ju mp er 1 2 li n- c3 6 0.1uf/25 v fb 1 r1 6 1.21k 1% fb 4 r1 2 5.1/1w rp - rc a2 rc a jac k 1 2 l4 15 uh r2 6 5.6/1w ke ep th is tr ace as s hor t a s po ss ibl e, di rec tly f rom r7 pi n lp wm- c3 7 0.1uf/25 v r2 7 5.6/1w jp 6 te min al 2 1 2 j1 ju mp er 1 2 r1 1 5.1/1w r1 7 1.21k 1% rc a1 rc a jac k 1 2 pg nd q1 rfp1 0p0 3l c4 0.47u f on vcc r2 0 15 /1w cn lisn r2 3 10 k c3 5 0.1uf/25 v fi lter 2 chok e cm 1 2 3 4 pg nd lin- _m u te vc c gn d + c2 0 4.7uf/25 v,tant c3 2 0.68u f/5 0v c2 0.1uf/25 v jp 1 te min al 2 1 2 c2 7 47 00 pf c8 0.1uf/25 v rfbk - q8 sup7 0n03- 09b p r7 0.010 /1w c2 8 47 00 pf q2 sup7 0n03- 09b p r1 3 5.1/1w c2 2 0.1uf/25 v r1 4 5.1/1w lp re out lfbk - gnd gnd c3 3 0.68u f/5 0v r2 4 5.6/1w c3 4 0.47u f/5 0v r1 8 1.21k 1% fi lter 1 chok e cm 1 2 3 4 mu te gn d q3 rfp1 0p0 3l + c1 22 00 uf/2 5v c1 4 33 00 pf rp re out r2 2 10 k pgnd c1 8 33 00 pf cn rp w m- r3 56 .2k 1% vcc ri n- r1 0 5.1/1w r6 0.010 /1w rfbk + jp 2a he ader 2 1 2 lfbk + ln- r2 5 5.6/1w r2 56 .2k 1% vcc l2 15 uh r1 9 1.21k 1% lfbk - 3. red heavy line means needing heavy duty trace or copper for high current of f ke ep th is tr ace as s hor t a s po ss ibl e, di rec tly f rom r6 pi n ch ass is_g nd r1 5 5.1/1w on lp + these traces keep as short as posible. c2 6 47 00 pf ri sn r2 1 15 /1w pg nd c3 1 0.47u f/5 0v fb 2 vcc sl eep pg nd ro ut + ri n- ln+ rp + fb 3 cl ock 2. pgnd and gnd plane is expected, they are devided by the center of lx1721 + c1 3 1u f/1 0v, tan t lp re out c1 6 33 00 pf 4. lpwm+,lpwm-,rpwm+,rpwm- must be kept as short as possible. pg nd c1 5 33 00 pf q6 sup7 0n03- 09b p + c1 7 4.7uf/25 v,tant vcc 5. chassis gnd circles the whole board on both the top layer and bottom layer. rn + c1 9 0.1uf/25 v l3 15 uh r9 5.1/1w li n+ c n lo ut- r5 49 .9k 1% sl ee p vcc lp wm+ + c2 1 22 00 uf/2 5v u1 lx 17 22cdb 1 2 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 33 34 35 36 37 38 39 40 41 42 43 44 lfao ut cp w m rp w m _l mu te le ao ut le ain vref cl ock gnd v2 5 lin+ lin- la mp out ri n+ ri n- ra mp ou t sl ee p status _r mu te re ain re ao ut rf ao ut rf bk - rfbk + ri sn nc pv dd cp pg nd rn + rp + rp - rn - ln- lp - lp + ln+ pg nd pv dd cn vdd lisn lfbk + lfbk - jp 3 he ader 3 1 2 3 jp 5 te min al 2 1 2 r1 10 k q5 rfp1 0p0 3l jp 7 he ader 2 1 2 1. star connection is expected for pgnd; f igure 1 - lxe1722-150 s chematic
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2002 rev. 0.2b, 2002-11-04 bill of materials miscellaneous components line item part description manufacturer & part # case reference designators qty 1 ic, controller l infinity lx1722cdb qsop 44 u1 1 2 ic, p ? channel mosfet i ntersil rfp10p03l to-220 q1, q3, q5, q7 4 3 ic, n ? channel mosfet v ishay sup70n03-09bp to-220 q2, q4, q6, q8 4 4 ferrite bead m urata blm41p102sgpt 1206 l100 1 5 choke cm (emi common mode) choke filter1, filter2, filter3 3 6 printed circuit board l infinity sge2813-x2 pcb rev. x2 1 7 power supply choke spl5028-100m choke l6 1 8 inductor, 15uh a bracon aimt-103-15h th l1, l2, l3, l4 4 9 phono jack, 90 nickel plated, white m ouser 161-4214 th rca1 1 10 phono jack, 90 nickel plated, red m ouser 161-4214 th rca2 1 11 header, str. .100? center, 2pos a ny 87220-2 th j1, j2, jp2, jp2a, jp7 5 12 header, str. .100? center, 3pos a ny 87220-3 th jp3 1 13 header, double row .100? center, 6pos a ny 1/87215-2 th jp4 1 14 shorting jumpers, open top, black m ouser 151-8030 th j1, j2 2 15 terminal block 2pos 5mm b lock m aster 301-021-1000 th jp1, jp5, jp6 3 capacitors line item part description manufacturer & part # case reference designators qty 1 capacitor, 22pf, 50v, 5% n ovacap 0805n220j500nt avx 08055c220jat2a 0805 c9, c11 2 2 capacitor, 100pf, 50v, 5% n ovacap 0805n101j500nt avx 08055c101jat2a 0805 c7, c10, c12 3 3 capacitor, 100nf, 50v, 20% avx 08055c104mat2a n ovacap 0805b104m500nt s amsung cl21b104mbnc 0805 c2, c8, c19, c22, c35, c36, c37, c38 8 4 capacitor, 4700pf, 50v, 5% c alchip gmc21cg472j50nt 0805 c25, c26, c27, c28 4 5 capacitor, tant 1f, 16v, 20% k emet t491a105m016as avx taja105m016r 3216 c13 1 6 capacitor, tant 4.7f, 25v k emet t491a475m016as avx taja475m016r 3216 c17, c20 2 7 capacitor, 0.47f, 50v, 5% p anasonic ecq-v1h474jl th c3, c4, c5, c6, c31, c34 6 8 capacitor, 0.68f, 50v p anasonic ecq-v1h684jl th c29, c30, c32, c33 4 9 capacitor, 2200f, 25v, 20% p anasonic eeu-fc1e222 th c1, c21 2 resistors line item part description manufacturer & part # case reference designators qty 1 resistor, 10k, 5%, 1/8w asj cr21j103t 0805 r1, r3, r22, r23 4 2 resistor, 1.21k, 1%, 1/8w asj cr21f1211t 0805 r16, r17, r18, r19 4 3 resistor, 49.9k, 1%, 1/8w asj cr21f4992t 0805 r5 1 4 resistor, 56.2k, 1%, 1/8w asj cr21f5622t 0805 r2, r4 2 5 resistor, 5.1 ohm, 5%, 1w koa rm73b3a5r1j r ohm mcr100jzhj5r1 2512 r8, r9, r10, r11, r12, r13, r14, r15 8 6 resistor 15 ohm, 5%, 1w koa rm73b3a150j r ohm mcr100jzhj150 2512 r20, r21 2 7 resistor, 0.01 ohm, 1w, 5% v ishay wsl2512r010fre4 2512 r6, r7 2 8 resistor, 0 ohm, 5% 0805 asj cr21j000t 0805 fb1, fb2, fb3, fb4 4 note: l6, filter1/2/3 & r24/r25/r26/r27 are optional for emi reduction.
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2002 rev. 0.2b, 2002-11-04 board layout f igure 2 - c omponents l ayer l ayout
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2002 rev. 0.2b, 2002-11-04 board layout (continued) f igure 3 ? s older l ayer l ayout
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 7 copyright ? 2002 rev. 0.2b, 2002-11-04 board layout (continued) f igure 4 - lxe1722-150 c omponents p lacement absolute maximum ratings unless otherwise specified, the following specificati ons apply over the operat ing ambient temperature 0 c t a 70 c lx1722-150 parameter symbol test conditions min typ max units supply voltage vcc 7 25 v supply current idd vcc=25v 12 a quiescent current iq vcc=25v, output open 200 ma sleep, status vcc = 25v -0.3 vcc + 0.3 v rpwm,cpwm, mute vcc = 25v -0.3 vcc + 0.3 v lin+, lin-, rin+, rin- vin vcc = 25v -0.3 vcc +0.3 v lpreout, rpreout vpre vcc = 25v -0.3 vcc +0.3 v clock frequency fosc vcc = 25v 250 330 500 khz
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 8 copyright ? 2002 rev. 0.2b, 2002-11-04 graphs linfinity microsemi 12/06/01 11:44:48 lx1722 thd+n vs. power 4ohm thdvspwr-4ohm-orig.at1 color line style thick data axis cursor1 cursor2 cyan solid 2 anlr.thd+n ratio left *4.96869 % *0.02209 % green solid 2 anlr.thd+n ratio left 4.79020 % 0.02464 % 10hz ~ 22khz bpf, f=1khz, 25vdc, 4ohm load cyan -- channel 1; green -- channel 2 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 4.96869 0.02209 % 100m 100 200m 500m 1 2 5 10 20 50 74.57 4.1 w dx=-70.47 w dy=-4.94659 % linfinity microsemi 12/06/01 11:50:07 lx1722 thd+n vs. power 2ohm thdvspwr-2ohm-orig.at1 color line style thick data axis cursor1 cursor2 cyan solid 2 anlr.thd+n ratio left *2.32259 % *0.03121 % green solid 2 anlr.thd+n ratio left 2.15622 % 0.03694 % 10hz ~ 22khz bpf, 25vdc, 2ohm load, 1khz cyan -- ch1, 1khz; green -- ch2, 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 2.32259 0.03121 % 100m 300 200m 500m 1 2 5 10 20 50 100 200 114.8 1.534 w dx=-113.3 w dy=-2.29138 %
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 9 copyright ? 2002 rev. 0.2b, 2002-11-04 graphs linfinity microsemi 12/06/01 11:54:23 lx1722 thd+n vs. frequency 4ohm thdvsfreq_4ohm-orig.at1 10hz ~ 22khz bpf, 4ohm load, 25vdc cyan -- ch1; green -- ch2; ---- pout=70w; red -- ch1; magenta -- ch2; ---- pout=10w; blue -- ch1; yellow -- ch2; ---- pout=1w; 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.13419 0.03484 % 20 20k 50 100 200 500 1k 2k 5k 10k 5.025k 100.225 hz dx=-4.9248 khz dy=-0.09935 % linfinity microsemi 12/06/01 12:01:44 lx1722 thd+n vs. frequency 2ohm thdvsfreq_2ohm.at1 10hz ~ 22khz bpf, 2ohm load, 25vdc cyan -- ch1; green -- ch2; ---- pout=1w; red -- ch1; magenta -- ch2; ---- pout=10w; blue -- ch1; yellow -- ch2; ---- pout= 110w; 0.001 100 0.002 0.005 0.01 0.02 0.05 0.1 0.2 0.5 1 2 5 10 20 50 0.11744 0.02677 % 20 20k 50 100 200 500 1k 2k 5k 10k 6.325k 100.225 hz dx=-6.2248 khz dy=-0.09067 %
lxe1722-150 e valuation b oard u ser g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 10 copyright ? 2002 rev. 0.2b, 2002-11-04 graphs linfinity microsemi 12/06/01 12:02:54 lx1722 frequency response 4ohm fr-80k.-4ohm.at1 color line style thick data axis cursor1 cursor2 cyan solid 2 anlr.am pl left *-0.044 dbr *-1.267 dbr green solid 2 anlr.ampl left -0.188 dbr -1.367 dbr 25vdc, 1w output, 10~80khz bpf, 4ohm load cyan - ch1; green - ch2 -10 +10 -8 -6 -4 -2 +0 +2 +4 +6 +8 -0.044 -1.267 d b r 10 200k 20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k 19.835k 19.35 hz dx=-19.816 khz dy=-1.223 db linfinity microsemi 12/06/01 12:04:14 lx1722 frequency response 2ohm fr-80k.-2ohm.at1 color line style thick data axis cursor1 cursor2 cyan solid 2 anlr.ampl left *-4.598 dbr *-1.300 dbr green solid 2 anlr.ampl left -4.847 dbr -1.399 dbr 25vdc, 1w output, 10~30khz bpf, 2ohm load cyan - ch1; green - ch2 -10 +10 -8 -6 -4 -2 +0 +2 +4 +6 +8 -4.598 -1.3 d b r 10 80k 20 50 100 200 500 1k 2k 5k 10k 20k 50k 19.835k 19.35 hz dx=-19.816 khz dy=+3.298 db
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