TDA7294: amfilifa kewaye. Bridge amfilifa kewaye TDA7294

A-guntu TDA7294 amfilifa kewaye shi ne quite sauki, shi za su iya maimaita ko da wani mutum, shi ne ba da karfi a cikin lantarki. Ulf wannan guntu zai zama manufa domin amfani a magana tsarin for your gida PC, TV, cinema. Its amfani shi ne, shi ba ya bukatar lafiya kunna da kuma gyara, kamar yadda shi ne yanayin da transistor amplifiers. Kuma abin da ya ce game da bambanci da fitilar kayayyaki - yawa karami girma.

Yana ba ya bukatar high-ƙarfin lantarki da samar da lantarki ga anode haihuwarka. Hakika, akwai dumama, kamar yadda a cikin fitilar constructions. Saboda haka, idan ka shirya amfani da amfilifa na dogon lokaci, shi ne mafi kyau a kafa a Bugu da kari ga aluminum zafi kwatami ne ma a kalla karamin fan domin tilasta samun iska. Ba tare da shi a kan micro-TDA7294 amfilifa kewaye zai yi aiki, amma shi ne m je a zazzabi kariya.

Me TDA7294?

Wannan guntu ne Popular ga fiye da shekaru 20. An lashe amanar rediyo yan koyo, kamar yadda yana da matukar high yi amplifiers dangane da shi da sauki, sake yi iya kowa, ko da wani novice hobbyist. Amfilifa guntu TDA7294 (makirci ne da aka ba a cikin labarin) na iya zama duka na daya da kuma sitiriyo. A ciki tsarin da guntu kunshi filin-sakamako transistors. Audio amfilifa gina a kan wannan guntu, nasa ne a aji AB.

abũbuwan amfãni guntu

A abũbuwan amfãni daga yin amfani da kwakwalwan kwamfuta for audio amplifiers:

1. Very high fitarwa iko. Game 70 Watts lokacin da kaya yana da wani juriya na 4 ohms. A wannan yanayin, shi ya shafi saba kewaye daga cikin guntu.

2. Game da 120 W at 8 ohms (a cikin gada kewaye).

3. A sosai low matakin na baya amo, hargitsi inconsequential, reproducible mitoci karya a cikin kewayon cikakken gane da mutum kunne - daga 20 Hz zuwa 20 kHz.

4. Power kwakwalwan kwamfuta za a iya samar da wani irin ƙarfin lantarki DC na 10-40 V. Amma akwai kananan hasara - dole ne ka yi amfani da wani dual wadata.

Yana da daraja biya da hankali ga daya fasalin - murdiya rabo ba fiye da 1%. A cikin micro-kewaye TDA7294 ikon amfilifa ne don haka sauki da cewa ko da mamaki kamar yadda ba ka damar samun high quality sauti.

Fil aiki na guntu

Kuma yanzu a more daki-daki game da abin da binciken ne don TDA7294. A karawar farko - a "siginar ƙasa" an haɗa da na kowa waya taron. Karshe "2" da kuma "3" - inverting da noninverting bayanai bi da bi. "4" ne fitarwa a matsayin "siginar ƙasa" haɗa zuwa ƙasa. A karo na biyar da kafa a cikin sauti mita amfilifa ba a amfani da. "6" kafa - a halin yanzu-ƙari, electrolytic capacitor aka haɗa shi. "7" da kuma "8" karshe - da kuma debe ikon shigar manzilõli, bi da bi. Kafa "9" - yanayin jiran aiki an yi amfani da iko da naúrar.

Hakazalika, "10" kafa - muting yanayin da aka kuma yi amfani da shiri na kula da naúrar na amfilifa. "11" da "12" tashoshi ba a yi amfani da zane na audio amplifiers. C "14" fitarwa siginar da aka dauka kashe da kuma ciyar da magana tsarin. "13" da "15" Pin cewa - a "+" da "-" don haɗa da ikon fitarwa mataki. A-guntu kewaye TDA7294 amfilifa subwoofer ne ba daban-daban daga wadanda samarwa a cikin labarin, shi ne kuma ru tare da kawai a low izinin tace, wanda aka haɗa zuwa shigar.

Features micro

A lokacin da zayyana audio amfilifa wajibi ne a kula da wanda alama - debe da abinci, da kuma cewa kafafu "15" da "8" ne electrically alaka da guntu jiki. Saboda haka ya zama dole don ware shi daga gidan ruwa, wanda a wani hali za a yi amfani da amfilifa. A saboda wannan dalili ya zama dole in yi amfani da musamman thermal spacers. Idan ka yi amfani da wata gada kewaye amfilifa TDA7294, kula da embodiment na jiki. Yana iya zama a tsaye ko a kwance irin. Mafi na kowa ne embodiment, kira a matsayin TDA7294V.

M ayyuka IC TDA7294

A guntu na samar da dama iri kariya, musamman, da bambanci ƙarfin lantarki. Idan kwatsam ƙarfin lantarki canji, sa'an nan guntu zai shiga kariya yanayin, sabili da haka, ba zai zama lantarki lalacewa. The fitarwa mataki ma yana da kariya a kan overloads da short haihuwarka. Idan da gidaje da aka kona zuwa da zazzabi na 145 digiri, da sauti da aka muted. Bayan kai 150 digiri akwai wani miƙa mulki ga yanayin jiran aiki. All karshe TDA7294 guntu kare da electrostatic.

ikon amfilifa

Simple, m ga kowa da kowa, da kuma mafi muhimmanci - cheap. Kamar 'yan sa'o'i za ka iya gina wani da kyau audio amfilifa. Kuma mafi yawan lokacin da ka ciyar a kan shi a gudanar da wani etching na hukumar. A tsarin kunshi kawai amfilifa ikon da kuma kula da raka'a, kazalika 2 tashoshi da Ulf. Gwada matsayin kadan zai yiwu na wayoyi amfani a cikin amfilifa zane. Tsaya ga sauki shawarwari:

1. M bukata - dangane wayoyi na da ikon samar wa kowane katako audio amp.

2. Ƙulla da leads a cikin kayan doki. Tare da wannan zai dan kadan rama domin Magnetic filin halitta da lantarki. Don yin wannan, dole ne ka dauki duk uku wadata wayoyi - "general", "debe" da "da", da kadan tashin hankali zuwa saƙa da su a cikin wani amarya.

3. A wani hali ba yin amfani a yi na abin da ake kira "ƙasa madaukai." Wannan shi ne yanayin a lokacin da na kowa waya a haɗa duk tsarin raka'a, rufe a cikin wani madauki. Duniya waya wajibi ne a samar da sequentially, fara daga shigar girma da iko, da kara zuwa audio amp jirgin da kuma dole ne ta zo ga ƙarshe a cikin fitarwa tashoshi. Shi ne ya zama wajibi a haɗa shi da shigar da kewaye ta amfani da kare wayoyi a kadaici.

yanayin iko naúrar jiran aiki, kuma bebe

Wannan guntu na da yanayin jiran aiki, kuma bebe. Domin gudanar da ayyuka na zama dole don sarrafa ta amfani da "9" karshe da "10". Kunna auku idan wadannan kafafu da kwakwalwan kwamfuta, babu wani tashin hankali, ko shi ne kasa da daya da rabi volts. Don kunna, dole ne ka nemi wata kafar guntu ƙarfin lantarki, da darajar da ya wuce 3.5V don sarrafa amfilifa allon faru lokaci guda, wanda da muhimmanci ga makircinsu dangane da irin gada, za daya iko naúrar ga duk matakai.

Lokacin da ikon da aka kunna ta, duk capacitors an caje daga wutan lantarki. A lura da naúrar ma daya capacitor accumulates cajin. Lokacin da tara matsakaicin yiwu cajin faruwa kashe jiran aiki. A na biyu capacitor da cewa an yi amfani da iko da naúrar, shi ne alhakin da bebe yanayin. Ya aka caji kadan daga baya, don haka da rada yanayin yana kashe na biyu.