TDA7294: amplifier wesifunda. Ibhuloho amplifier wesifunda TDA7294

On-chip TDA7294 amplifier wesifunda ulula, uzokwazi ukuphinda ngisho umuntu, akukhona kakhulu electronics. Ulf le chip Bekungaba kuhle kakhulu ukusetshenziswa ohlelweni isikhulumi PC ekhaya lakho, i-TV, cinema. Inzuzo yayo ukuthi akudingi ukuhleleka kwayo kanye ukulungiswa, njengoba kunjalo Transistor yokukhulisa umsindo. Futhi yini okufanele bayisho mayelana nalokho isibani imiklamo - Ubukhulu ezincane kakhulu.

Akudingi ephezulu voltage ugesi kuya izifunda anode. Yiqiniso, kukhona Ukushisa, njengoba kule ezakhiwe isibani. Ngakho-ke, uma uhlela ukusebenzisa amplifier isikhathi eside, kungcono ukufaka ngaphezu echibini aluminium ukushisa futhi okungenani fan encane ukuze ukupholisa ngenkani. Ngaphandle kwakhe phezu micro-TDA7294 amplifier wesifunda izosebenza, kodwa kungenzeka uye e Ukuvikelwa lokushisa.

Kungani TDA7294?

Lokhu chip kuthandwa kakhulu iminyaka engaphezu kuka-20. It unqobile nokwethenjwa umsakazo nayizimfundamakhwela, njengoba has a ukusebenza yokukhulisa umsindo ophakeme kakhulu okusekelwe kuso ilula, ukwakhiwa uphinda ukhona yini nje umuntu, ngisho imfundamakhwela hobbyist. Zesikhulisa chip TDA7294 (sikimu enikezwa esihlokweni) kungaba kokubili mono futhi stereo. I Sakhiwo sangekhatsi chip siqukethe ensimini-umphumela transistors. amplifier lomsindo sakhiwa kule chip, utfolakala kuluhlobo AB.

Izinzuzo chip

Izinzuzo usebenzisa ama-chips yokukhulisa umsindo yomsindo:

1. okusezingeni eliphezulu kakhulu amandla okukhipha. Mayelana 70 Watts lapho umthwalo has a ukumelana 4 ohms. Kulokhu, kusebenza wesifunda evamile chip.

2. Cishe 120 W at 8 ohms (yesifunda ibhuloho).

3. Izinga eliphansi kakhulu umsindo omkhulu ovela ngemuva, Ukuhlanekezelwa engasho lutho, amaza reproducible amanga kwibanga beqonda ngokugcwele by endlebeni yomuntu - kusuka 20 Hz kuya ku-20 kHz.

4. Amandla chips zingaba ngumuntu DC voltage ka 10-40 V Kodwa kukhona kusimo encane - kufanele usebenzise supply ezimbili.

Kuwufanele ukunaka omunye sici - ukuhlanekezela ratio akukona ezingaphezu kuka-1%. On the micro-wesifunda amandla TDA7294 amplifier ilula kangangokuba ngisho ukumangala njengoba ikuvumela ukuba uthole umsindo eliphezulu.

isabelo Pin chip

Futhi manje kabanzi ngalokho okutholakele ziyatholakala TDA7294. Umlenze wokuqala - a "isignali phansi" ixhunywe wire ezivamile inhlangano. Iziphetho "2" futhi "3" - inverting nokokufaka noninverting ngokulandelana. "4" kuyinto okukhipha ngokuthi "isignali phansi" ixhumekile phansi. Umlenze yesihlanu umsindo imvamisa amplifier alisetshenziswa. "6" umlenze - a wamanje-okufakiwe, capacitor electrolytic ixhunywe ke. "7" futhi "8" iziphetho - plus futhi lokususa amandla okokufaka izigaba ngokulandelana. Umlenze "9" - esimosokulinda isetshenziswa control unit.

Ngokufanayo, "10" umlenze - ukuthulisa imodi liyasetshenziswa ekwakhiweni le control unit of amplifier. "11" futhi "12" ezikhumulweni azisetshenziswa ekuklanyweni yokukhulisa umsindo audio. C "14" isignali okukhipha esithathwayo off ngabondla ohlelweni isikhulumi. "13" futhi "15" izikhonkwane ukuthi - i "+" futhi "-" ukuxhuma amandla okukhipha esiteji. On-chip wesifunda TDA7294 amplifier subwoofer akuhlukile labo ezihlongozwayo esihlokweni, it is kulekelelwa kuphela pass ongaphakeme lemifanekiso, okuyinto ixhunywe input.

Izici micro

Uma kuhlelelwa amplifier umsindo kuyadingeka ukuba banake esinye isici - lokususa ukudla, nokuthi imilenze "15" futhi "8" kukhona kagesi exhunyiwe emzimbeni chip. Ngakho-ke kuyadingeka ukuba uqokomise ke kusukela kurediyetha, okuyinto kunoma yiliphi icala sizosetshenziswa amplifier. Ngenxa yale njongo kubalulekile ukusebenzisa spacers ekhethekile ezishisayo. Uma usebenzisa i-ibhuloho wesifunda amplifier TDA7294, banake samuntu emzimbeni. Kungenzeka uhlobo ngokumile noma ngokuvundlile. Okuvame kakhulu kuyinto samuntu, ukubizwa ngokuthi TDA7294V.

imisebenzi Avikelayo IC TDA7294

Chip inikeza izinhlobo eziningana Ukuvikelwa, ngokukhethekile, voltage umehluko. Uma okungazelelwe voltage ushintsho ke chip kuzoya imodi Ukuvikelwa, Ngakho-ke, ngeke kube ukulimala kagesi. Isigaba okukhipha Ubuye isivikelo overloads nelezifunda iDemo. Uma izindlu ukufuthelana lokushisa 145 degrees, umsindo uthulisiwe. Lapho ufika degrees 150 kukhona inguquko kumodi yokulinda. Zonke iziphetho TDA7294 chip evikelwe electrostatic.

amandla amplifier

Simple, kufinyeleleke kuwo wonke umuntu, futhi okubaluleke - ezishibhile. Ngemva kwamahora ambalwa nje ungakwazi ukwakha amplifier ezinhle kakhulu umsindo. Futhi esikhathini esiningi oyosichitha kukho ukuba sifeze etching ebhodini. Isakhiwo siqukethe kuphela amandla amplifier nokulawula amayunithi, kanye iziteshi 2 Ulf. Zama ngangokusemandleni izintambo asetshenziswe design amplifier. Namathela izincomo elula:

1. okugunyaziwe imfuneko - izintambo ukuxhumana ugesi ukuze ibhodi ngalinye amp umsindo.

2. Bophela imikhondo ku amahanisi. Nale ngeke kancane isinxephezelo kazibuthe ezidalwe kagesi. Ukuze wenze lokhu, kumele uthathe uzime izintambo ezintathu - "jikelele", "lokususa" futhi "plus", nge ukungezwani okuncane ukuba sifake wawayisa eluka.

3. Akunakusetshenziswa ungayisebenzisi ekwakhiweni okubizwa ngokuthi "phansi izihibe." Lokhu kunjalo uma wire ezivamile yokuxhuma wonke amayunithi kwesakhiwo, ivaliwe ku-loop. Umhlaba wire kuyadingeka ukuze awunikeze ngokulandelana, kusukela okokufaka control ivolumu, eminye umsindo amp ibhodi futhi kumelwe siphele kule ezikhumulweni okukhiphayo. Kubaluleke kakhulu ukuxhuma wesifunda okokufaka usebenzisa izintambo kwakuvikela atihambi todvwa.

ukulawula imodi iyunithi eceleni futhi uyisimungulu

Lokhu chip has a standby mode futhi uyisimungulu. Ukuze afeze imisebenzi ezidingekayo ukulawula usebenzisa "9" tincumo nekubeka "10". Kuvuselela kwenzeka uma lezi imilenze chips akukho ukungezwani, noma kuba volts engaphansi nengxenye. Ukuze kusebenze, kumele afake isicelo zinamandla unyawo chip, ukubaluleka eyeqa 3.5V ukulawula amabhodi amplifier okwenzeka ngesikhathi esisodwa, okuyinto ebaluleke for the izikimu okusekelwe uhlobo kwebhuloho, ngiya komunye control unit for zonke izigaba.

Lapho amandla kuvuliwe, zonke capacitors basolwa kusukela kwamandla. I-control unit futhi omunye capacitor aqoqana kwenkokhelo. Lapho efaka esiphezulu icala kungenzeka icima eceleni. A capacitor wesibili ukuthi isetshenziswa control unit, unesibopho imodi thulisa. Yena ishaja ngemva kwesikhashana, ngakho imodi hleba icishe yesibili.