TDA7294: mkuzamawu dera. Bridge mkuzamawu dera TDA7294

Pa-Chip TDA7294 mkuzamawu dera ndi wosavuta, izo adzatha kubwereza ngakhale munthu, si amphamvu kwambiri zamagetsi. ULF Chip uyu angakhale abwino ntchito mu dongosolo wokamba nyumba PC wanu, TV, mafilimu a kanema. Ubwino wake ndi kuti sikutanthauza sintha ndi kusintha, monga momwe zilili ndi amplifiers transistor. Ndipo kodi kunena za kusiyana kwa nyali ziwembu - miyeso laling'ono kwambiri.

Izo sikutanthauza mkulu-voteji mphamvu kundipatsako kwa madera anode. Kumene, pali Kutentha, monga zomangamanga nyale. Choncho, ngati mukufuna kugwiritsa ntchito mkuzamawu kwa nthawi yaitali, ndi bwino kuika kuwonjezera pa zotayidwa koziziritsira ndi osachepera zimakupiza kochepa kwa mpweya wabwino amakakamizidwa. Popanda iye yaying'ono-TDA7294 mkuzamawu dera ntchito, koma ayenera kupita chitetezo kutentha.

Chifukwa TDA7294?

Chip Izi chotchuka kwambiri kwa zaka zoposa 20. Izo anapambana kum'khulupirira Amateurs wailesi, monga ali amplifiers kwambiri ntchito potengera izo mophweka, kubwereza yomanga aliyense, ngakhale novice hobbyist. Mkuzamawu Chip TDA7294 (chiwembu wapatsidwa m'nkhani) ukhoza kukhala rekodi ndi sitiriyo. Kapangidwe mkati mwa Chip ndizo kunja zotsatira transistors. Audio mkuzamawu anamanga pa Chip izi, ali wa kalasi AB.

ubwino Chip

Ubwino wa ntchito tchipisi kwa amplifiers zomvetsera:

1. waukulu kwambiri linanena bungwe mphamvu. 70 Watts pamene katundu ali ndi kulimbikira 4 ohms. Pankhaniyi, agwiritsidwa dera mwachizolowezi wa Chip lapansi.

2. Za 120 W pa ohms 8 (mu dera mlatho).

3. A mlingo wochepa kwambiri wa phokoso lambiri, kuwapotoza osafunika mafurikwense reproducible kugona mkati osiyanasiyana kwathunthu adazindikira mwa khutu la munthu - 20 Hz 20 kHz.

4. Mphamvu tchipisi akhoza kupangidwa ndi DC voteji wa 10-40 V. Koma pali sangathe kakang'ono - muyenera kugwiritsa ntchito chakudya wapawiri.

M'pofunikanso powasamalira Mbali imodzi - kupotoza chiŵerengero si oposa 1%. Pa yaying'ono-dera mkuzamawu TDA7294 mphamvu mophweka kuti ngakhale anadabwa monga timatha inu phokoso apamwamba.

Pin ntchito Chip ndi

Ndipo tsopano mwatsatanetsatane za zomwe anapezazo ndi kupezeka kwa TDA7294. Mbali yoyamba - ndi "mbendera pansi" chikugwirizana ndi waya wamba a khamulo. Mawuwo "2" ndi "3" - inverting ndi zolowetsa noninverting motero. "4" ndi linanena bungwe monga "pansi mbendera" olumikizidwa kwa nthaka. The mwendo chachisanu mu phokoso pafupipafupi mkuzamawu si ntchito. "6" mwendo - panopa-zowonjezera, electrolytic capacitor chikugwirizana ndi izo. "7" ndi "8" mfundo - kuphatikiza ndi opanda mphamvu athandizira magawo motero. Mwendo "9" - mode Standby ntchito unit kulamulira.

Mofananamo, "10" mwendo - muting mode amagwiritsidwanso ntchito yomanga ulamuliro pachikhalidwe cha mkuzamawu lapansi. "11" ndi "12" malo si ntchito kamangidwe ka amplifiers audio. C "14" linanena bungwe mbendera ndi kuchotsedwa ndi kudyetsedwa kwa dongosolo wokamba. "13" ndi "15" zikhomo kuti - ndi "+" ndi "-" kulumikiza siteji mphamvu linanena bungwe. Pa-Chip dera TDA7294 mkuzamawu subwoofer palibe zosiyana ndi zimene akufuna m'nkhani, izo wodzilemekeza okha otsika chikudutsa fyuluta, amene chikugwirizana ndi athandizira lapansi.

Features yaying'ono

Pamene angagwiritse mkuzamawu zomvetsera m'pofunika kulabadira Mbali imodzi - opanda chakudya, ndi kuti miyendo "15" ndi "8" ndi electrically zikugwirizana kwa Chip thupi. Choncho m'pofunika kupeza izo kwa rediyeta, amene Mulimonsemo zigwiritsidwe ntchito pa mkuzamawu lapansi. Chifukwa chaichi m'pofunika ntchito yapadera spacers matenthedwe. Ngati inu ntchito mlatho dera mkuzamawu TDA7294, kulabadira mwiniwake wa thupi. Izo zikhoza kukhala ofukula kapena yopingasa mtundu. Ambiri ndi chimake, amatchedwa TDA7294V.

ntchito zoteteza IC TDA7294

Chip amapereka mitundu yambiri ya chitetezo, makamaka, ndi masiyanidwe voteji. Ngati mwadzidzidzi voteji kusintha, ndiye Chip adzatengedwa kupita ku mode chitetezo Choncho, sadzakhala kuwononga magetsi. Mbali linanena bungwe alinso chitetezo overloads ndi madera yochepa. Ngati nyumba ali usavutike kutentha madigiri 145, phokoso ndi asowetsedwa. Akafike madigiri 150 pali kusintha kwa mode standby. Onse mfundo TDA7294 Chip kutetezedwa electrostatic.

mkuzamawu mphamvu

Zambiri, yopezeka kwa aliyense, ndipo ambiri Chofunika - wotchipa. Patangopita maola ochepa mukhoza kumanga wabwino kwambiri zomvetsera mkuzamawu. Ndipo nthawi zambiri timathera kuti agwire etching ya bolodi. Kapangidwe tichipeza okha mkuzamawu mphamvu ndi ulamuliro mayunitsi, komanso 2 mitsinje ULF. Yesani zochepa ngati n'kotheka a mawaya ntchito mapulani mkuzamawu. Khulupirikani kwa ayamikira losavuta:

1. Kuvomerezedwa chofunika - mawaya kugwirizana ndi magetsi aliyense gulu zomvetsera mkuzamawu.

2. Mangani amatsogolera mu oyang'anira a. Ndi uyu adzakhala pang'ono zoperewerazo ya maginito analengedwa ndi magetsi. Kuti tichite zimenezi, utenge zonse mawaya okwanira atatu - "ambiri", "opanda" ndi "kuphatikiza", ndi mavuto pang'ono kuti yokhotakhota iwo mu kuluka a.

3. Palibe sindigwiritsa ntchito pomanga otchedwa "zingwe zopota pansi." Izi zili choncho pamene waya wamba polumikiza mayunitsi onse structural, anatseka mu kuzungulira. Earth waya m'pofunika kupereka sequentially, kuyambira athandizira ulamuliro buku, mopitirira za gulu zomvetsera mkuzamawu ndipo ayenera kutha mu malo linanena bungwe. Nkofunikira kulumikiza athandizira dera ntchito mawaya isagwe kwayekha.

mode ulamuliro wagawo standby komanso wosalankhula

Chip uyu ali mode standby komanso wosalankhula. Kugwira ntchito zofunika kulamulira ntchito "9" mfundo ndi "10". Mphamvu kumachitika ngati miyendo izi tchipisi palibe nkhawa, kapena ndi zosakwana chimodzi ndi theka volts. Kuti yambitsa, muyenera kugwiritsa ntchito kwa phazi Chip voteji, mtengo umene umaposa 3.5V kulamulira matabwa mkuzamawu zinachitika imodzi, chimene chiri chofunika kwa machenjerero potengera mtundu wa mlatho, ati wina wagawo kulamulira kwa masiteji onse.

Pamene mphamvu anatembenukira, capacitors onse ali ndi udindo kwa magetsi. Ulamuliro wagawo komanso capacitor wina amasonkhana mlandu. Pamene wambirimbiri pazipita zotheka mlandu kupita standby. A capacitor chachiwiri ntchito unit ulamuliro, ndi amene mode wosalankhula. Iye nauza patsogolo pang'ono, kotero mode kunong'ona akutembenukira kutali wachiwiri.