TDA7294: msindo yesekethe. Bridge TDA7294 sesimangalo yesekethe

Kwi-chip TDA7294 yesekethe msindo ilula, uya kukwazi ukuphinda kwanomntu, bayoyisakala kakhulu elektroniki. ULF chip Bekuya kuba kuhle ukuba zisetyenziswe kwinkqubo isithethi for PC ikhaya lakho, TV, cinema. inzuzo yayo kukuba ingakufuni wasele ocoliweyo, ukulungiswa, njengoko kunjalo yokukhulisa transistor. Kwaye yintoni uthini umahluko lwezoyilo isibane - imilinganiselo emincinane kakhulu.

Akudingi phezulu-ombane amandla unikezelo kwi kwiisekethe anode. Kakade ke, kukho zokufudumeza, njengoko kwi izakhiwo isibane. Ngoko ke, ukuba uceba ukusebenzisa lo mshini ixesha elide, kuya kuba kuhle ukuba ukufaka ukongeza ukuya kumgxobhozo aluminiyam ubushushu nalo ubuncinane fan encinane umoya ngebhaxa. Ngaphandle naye lo mshini yesekethe micro-TDA7294 iya kusebenza, kodwa kusenokwenzeka ukuya yokhuseleko lobushushu.

Kutheni TDA7294?

Le chip into ethandwa kakhulu iminyaka engaphezu kwama-20. Kuye iphumelele intembeko amateurs zerediyo, njengoko has a yokukhulisa namaziko asebenza kwizinga eliphezulu kakhulu isekelwe phezu kwalo elula, ukwakhiwa phinda ubani, nkqu hobbyist abo basandula kuqalisa. TDA7294 sesimangalo chip (scheme inikwa kweli nqaku) kunokuba zombini mono kunye yesitiroyo. Isakhiwo lwangaphakathi chip yenziwa transistors zasendle-isiphumo. msindo Audio wakha phezu kweli chip loluka iklasi AB.

izinto eziluncedo chip

Iingenelo ngokusebenzisa chips yokukhulisa audio:

1. amandla enkulu kakhulu. Malunga 70 Watts xa umthwalo uye ukungawi ohms 4. Kulo mzekelo, oku kusebenza isiphaluka eliqhelekileyo chip.

2. Malunga 120 W kwi ohms 8 (kwisekethe ibhulorho).

3. A inqanaba elisezantsi kakhulu yengxolo imvelaphi, igqwethwe okanye nganto, ezitsho yokwandisa kulala phakathi uluhlu baqonda ngokupheleleyo yi indlebe yabantu - ukususela 20 Hz ukuya 20 kHz.

4. chips Power nga kuveliswa DC ombane ka 10-40 V. Kodwa kukho kuyinto embi encinane - kufuneka usebenzise unikezelo ezimbini.

Iyafuna ukunikela ingqalelo phawu omnye - ubugqwetha ratio ayikho ngaphezulu kwe-1%. Ngomhla micro-yesekethe TDA7294 amandla msindo elula kangangokuba isimanga njengoko kukuvumela ukuba ufumane isandi yodidi oluphezulu.

Pin ngolwabiwo chip

Kwaye ngoku ngeenkcukacha ezithe vetshe malunga ziyafumaneka TDA7294 iziphumo. Umlenze lokuqala - i "umhlaba umqondiso" liqhagamshelene iingcingo oqhelekileyo ibandla. Iziphelo "2" kunye "3" - inverting kunye nezimvo noninverting ngokulandelelanayo. "4" yi output njengoko 'umhlaba njengomqondiso "bene emhlabeni. Umlenze yesihlanu frequency msindo isandi lisusiwe. "6" umlenze - into ekhoyo-additive, capacitor electrolytic elidityaniswe kuyo. "7" yaye "8" izigqibo - igalelo plus kwaye thabatha namandla izigaba ngokulandelelanayo. Leg "9" - Imo yokulinda lisetyenziswa iyunithi yolawulo.

Ngokufanayo, "10" umlenze - Uyeke mode nayo asetyenziswe ekwakheni yunithi kolawulo lwe lo mshini. "11" yaye "12" ezinjengeetheminali azibhalwanga kusetyenziswa kuyilo yokukhulisa odiyo. C "14" uphawu lwe output sithathwa waza wondla kwindlela isithethi. "13" yaye "15" zehle - i "+" yaye "-" ukudibanisa iqonga output amandla. Kwi-chip yesekethe TDA7294 msindo subwoofer akukho eyahlukileyo kwezo okucetywayo kweli nqaku, kubhaliwe neyongezelelwe kuphela lokucoca asezantsi okuphumelela kwabafundi, oludityaniswe ngayo igalelo.

iimpawu micro

Xa eyila msindo audio kuyimfuneko ukunikela ingqalelo phawu omnye - thabatha nokutya, nokuba imilenze "15" kunye "8" kagesi inxibelelene umzimba chip. Ngoko kuyimfuneko ukuba ayivalele evela kwi radiator, nto leyo kuyo nayiphi imeko aya kusetyenziswa lo mshini. Ukulungiselela le njongo kufuneka ukuba usebenzise spacers ezikhethekileyo thermal. Ukuba usebenzisa ibhulorho yesekethe msindo TDA7294, ahlawule ingqalelo ngumfuziselo umzimba. Kungaba uhlobo nkqo okanye zilaliswe. Avamise kakhulu i ngobuwena, nezaziwa TDA7294V.

imisebenzi kukhuseleko IC TDA7294

Nj ubonelela iintlobo eziliqela wokhuseleko, ingakumbi, i-ombane umahluko. Ukuba utshintsho ombane ngesiquphe, ngoko ke chip uya kungena imo yokhuseleko, ngoko, akayi kuba umonakalo zombane. Imveliso Inqanaba kwakhona unalo ukhuseleko nxamnye nomthwalo neesekethe elifutshane. Ukuba izindlu lusitsha ukuze lobushushu degrees 145, isandi iyathula. Emva kokuba degrees 150 kukho utshintsho kwimo yokulinda. Zonke izigqibo TDA7294 chip ezikhuselweyo nxamnye electrostatic.

amandla sesimangalo

Simple, zifikeleleke kuye wonke, kwaye okona kubalulekileyo - cheap. Kwiiyure nje ezimbalwa ungakha msindo elungileyo kakhulu odiyo. Yaye uninzi ixesha olichitha ngayo ukuphumeza lo ngasekhohlo webhodi. Isakhiwo iqulathe iiyunithi kuphela amandla wokukhulisa kunye nolawulo, kunye namajelo 2 ULF. Zama kancinci kangangoko le micwe kusetyenziswa kuyilo umsindo. Hlala zincomo elula:

1. imfuneko olugunyazisiweyo - iingcingo uqhagamshelwano lwe kombane kwibhodi amp ngamnye odiyo.

2. Tie umkhondo kwi awayezinxibile. Nale eyokwenza kancinane ukuba lo mhlaba otsalayo owadalwa umsinga wombane. Ukuze wenze oku, kufuneka uthathe zontathu imicwe ubonelelo - "jikelele", "thabatha" yaye "dibanisa", kunye ukungaqondani kancinane ukuba sifake ibe qhina.

3. Akukho mzekelo musa ukusebenzisa ekwakhiweni le ebizwa ngokuba "ephambuka emhlabeni." Oku kunjalo xa wire eqhelekileyo ohlanganisa zonke iiyunithi lwesakhiwo, ivaliwe kwi loop. wire Umhlaba kuyimfuneko ukuba zinike ngokulandelelana, ukuqala kwigalelo ulawulo volume, ngokubhekele kwibhodi amp audio yaye kufuneka bafikelele esiphelweni iiterminal kwimveliso. Kunyanzelekile ukudibanisa wesekethe igalelo usebenzisa iingcingo wasikhusela bodwa.

ulawulo mode unit yokulinda sisimumu

Le chip na imo yokulinda isisidenge. Ukwenza imisebenzi eyimfuneko ukulawula usebenzisa izigqibo "9" yaye "10". Isebenze kwenzeka ukuba le milenze iitshiphusi akukho uxinzelelo, okanye ke volts ngaphantsi kwe enye enesiqingatha. Ukuze isebenze, kufuneka isicelo ombane ngonyawo chip, ixabiso amakhulu 3.5V ukulawula iibhodi wokukhulisa yenzekile ngexesha elinye, oko kubalulekile ukuba amacebo asekelwe kuhlobo ibhulorho, ukuya iyunithi yolawulo enye zonke izigaba.

Xa amandla ivuliwe, bonke capacitors ebizwayo ukusuka umbane. Iyunithi yolawulo kwakhona omnye capacitor oluhlala kwentlawulo. Xa lokwandisa intlawulo ubuninzi kunokwenzeka ayesiya yokulinda. A capacitor wesibini lisetyenziswa iyunithi yolawulo, linoxanduva imo bathethe. Yena kancinane akuba kamva, ngoko ke imo ukuhleba sivala owesibini.