TDA7294: amplifier Circuit Court. Choj amplifier Circuit Court TDA7294

On-nti TDA7294 amplifier Circuit Court yog yooj yim heev, nws yuav tsum tau kom rov hais dua txawm ib tug neeg, yog tsis muaj zog heev nyob rau hauv electronics. Ulf no nti yuav zoo tagnrho rau siv nyob rau hauv hais lus system rau koj lub tsev PC, TV, xinesmas. Nws zoo dua yog hais tias nws tsis yuav tsum tau zoo nyob thiab kev hloov, raws li yog cov ntaub ntawv nrog transistor amplifiers. Thiab yog dab tsi hais txog tus zoo ntawm teeb designs - me npaum li cas qhov ntev.

Nws tsis yuav tsum tau high-voltage fais fab mov mus rau lub anode circuits. Ntawm cov hoob kawm, muaj cua sov, raws li nyob rau hauv lub teeb Siv. Yog li ntawd, yog tias koj npaj mus siv lub amplifier rau ib ntev lub sij hawm, nws yog qhov zoo tshaj plaws rau nruab nyob rau hauv tas li ntawd mus rau lub txhuas tshav kub tog tseem yog tsawg kawg yog ib tug me me kiv cua rau yuam cua. Yog tsis muaj nws nyob rau hauv micro-TDA7294 amplifier Circuit Court yuav ua hauj lwm, tab sis nws no tej zaum yuav mus nyob rau hauv kub tiv thaiv.

Yog vim li cas TDA7294?

Qhov no nti yog heev nrov rau ntau tshaj 20 xyoo. Nws tau yeej txoj kev ntseeg ntawm xov tooj cua amateurs, raws li nws muaj ib tug heev muaj kev kawm siab amplifiers raws li nyob rau hauv nws yooj yim, rov siv tau leej twg, txawm ib novice hobbyist. Amplifier nti TDA7294 (tswvyim yog muab nyob rau hauv tsab xov xwm) yuav ua tau ob qho tib si mono thiab tso suab. Lub sab hauv qauv ntawm cov nti muaj teb-nyhuv transistors. Suab amplifier ua rau no nti, belongs rau ib chav kawm ntawv AB.

Zoo nti

Qhov zoo ntawm kev siv tej daim rau suab amplifiers:

1. heev tso zis ntau zog. Hais txog 70 Watts thaum lub load muaj ib tug tsis kam ntawm 4 ohms. Nyob rau hauv cov ntaub ntawv no, nws siv tau li ib txwm Circuit Court ntawm lub nti.

2. Hais txog 120 W nyob rau hauv 8 ohms (nyob rau hauv tus choj Circuit Court).

3. Ib tug heev tsawg theem ntawm keeb kwm yav dhau suab nrov, distortions tseem ceeb, reproducible frequencies pw nyob rau hauv ib ntau siab ntaus nqi los ntawm cov tib neeg pob ntseg - los ntawm 20 Hz mus rau 20 kHz.

4. fais fab chips yuav tau ua los ntawm ib tug DC voltage ntawm 10-40 V. Tab sis muaj ib tug me me disadvantage - koj yuav tsum tau siv ib tug dual mov.

Nws yog ib nqi hmoog rau ib tug feature - distortion piv tsis ntau tshaj 1%. Nyob rau micro-Circuit Court TDA7294 hwj chim amplifier yog li ntawd yooj yim hais tias txawm ib tug surprise raws li nws tso cai rau koj kom tau ib tug high-zoo suab.

Pin hauj lwm ntawm lub nti

Thiab tam sim no nyob rau hauv ntau yam hais txog dab tsi cov uas nrhiav tau uas muaj nyob rau TDA7294. Tus thawj ceg - ib tug "teeb liab av" yog kev cob cog rua kom cov hlau ntawm lub rooj sib txoos. Lus xaus "2" thiab "3" - inverting thiab noninverting inputs feem. "4" yog tso zis li "lub teeb liab av" kev cob cog rua rau hauv av. Lub tsib ceg nyob rau hauv lub suab zaus amplifier yog tsis siv. "6" ceg - ib tug tam sim no-additive, electrolytic capacitor yog kev cob cog rua rau nws. "7" thiab "8" cov lus xaus - ntxiv thiab rho tawm hwj chim tswv yim theem feem. Ceg "9" - Standby hom yog siv nyob rau hauv cov kev tswj chav tsev.

Ib yam li ntawd, "10" ceg - muting hom kuj yog siv nyob rau hauv kev tsim kho ntawm cov tswj tsev ntawm lub amplifier. "11" thiab "12" terminals yog tsis siv nyob rau hauv lub tsim ntawm cov suab amplifiers. C "14" tso zis teeb liab yog muab tshem tawm thiab pub rau cov lus qhia system. "13" thiab "15" pins uas - ib tug "+" thiab "-" rau txuas lub hwj chim zis theem. On-nti Circuit Court TDA7294 amplifier subwoofer yog tsis sib txawv los ntawm cov neeg npaj siab nyob rau hauv tsab xov xwm, nws yog supplemented nrog xwb ib tug tsawg pass lim, uas yog kev cob cog rua rau lub tswv yim.

nta micro

Thaum tsim suab amplifier yog tsim nyog them sai sai mus rau ib feature - rho tawm cov zaub mov, thiab hais tias tus ceg "15" thiab "8" yog electrically kev cob cog rua rau lub nti lub cev. Yog li ntawd nws yog tsim nyog los cais nws los ntawm qhov radiator, uas nyob rau hauv txhua rooj plaub yuav tsum tau siv nyob rau hauv lub amplifier. Rau lub hom phiaj no nws yog tsim nyog los siv ib tug tshwj xeeb thermal taub txuas. Yog hais tias koj siv ib tug choj Circuit Court amplifier TDA7294, xyuam xim rau cov embodiment ntawm lub cev. Tej zaum nws yuav ntsug los yog kab rov tav hom. Feem ntau yog ib tug embodiment, xa mus rau raws li TDA7294V.

Tiv zog IC TDA7294

Lub nti muab ob peb hom kev tiv thaiv, nyob rau hauv particular, tus differential voltage. Yog hais tias ib tug cia li voltage hloov, ces tus nti yuav mus rau hauv kev tiv thaiv hom, yog li ntawd, yuav tsis muaj hluav taws xob kev puas tsuaj. Lub tso zis theem kuj muaj kev tiv thaiv tiv thaiv overloads thiab luv luv circuits. Yog hais tias lub tsev yog rhuab mus rau ib tug kub ntawm 145 degrees, lub suab yog muted. Thaum ncav 150 degrees muaj ib txoj kev hloov mus rau lub standby hom. Tag nrho cov lus xaus TDA7294 nti tiv thaiv tiv thaiv electrostatic.

hwj chim amplifier

Tej yam yooj yim, mus siv cuag rau txhua leej txhua tus, thiab feem ntau cov tseem ceeb - pheej yig. Cia li ob peb teev koj yuav tsim ib tug heev zoo suab amplifier. Thiab feem ntau ntawm cov sij hawm uas koj siv rau nws mus nqa tawm etching ntawm lub Rooj Tswjhwm Saib. Tus qauv muaj tsuas yog tus amplifier hwj chim thiab kev tswj chav nyob, raws li zoo raws li 2 raws lub Ulf. Sim raws li me ntsis li sai tau ntawm nyob ntawm tej siv nyob rau hauv lub amplifier tsim. Lo rau tej yam yooj yim pom zoo:

1. Yuav Tsum yuav tsum tau - kev twb kev txuas ntawm tej ntawm lub hwj huam mov mus rau txhua board suab amp.

2. Khi lub ua nyob rau hauv lub sam xauv nees. Nrog rau qhov no yuav ib nyuag txawm peem rau qhov sib nqus teb tsim los ntawm ib tug hluav taws xob tam sim no. Ua li no, koj yuav tsum nqa tag nrho peb mov nyob ntawm tej - "general", "rho tawm" thiab "plus", nrog ib tug me ntsis nro fiab lawv mus rau hauv ib tug braid.

3. Nyob rau hauv tsis muaj cov ntaub ntawv tsis siv nyob rau hauv kev tsim kho ntawm lub thiaj li hu ua "av loops." Qhov no yog cov ntaub ntawv thaum muaj ib tug ntau hlau txuas tag nrho cov structural units, kaw nyob rau hauv lub voj. Lub ntiaj teb hlau yog tsim nyog los muab sequentially, pib los ntawm lub tswv yim ntim tswj, ntxiv mus rau lub suab amp board thiab yuav tsum tuaj mus rau qhov kawg nyob rau hauv lub tso zis terminals. Nws yog ib qho tseem ceeb mus cuag lub tswv yim Circuit Court siv shielded nyob ntawm tej hauv kev rho tawm.

hom kev tswj chav tsev standby thiab hais tsis tau lus

Qhov no nti muaj ib tug standby hom thiab hais tsis tau lus. Mus nqa tawm lub zog tsim nyog los tswj siv "9" cov lus xaus thiab "10". Activating tshwm sim yog hais tias cov ob txhais ceg chips muaj yog tsis muaj nro, los yog nws yog tsawg tshaj li ib tug thiab ib tug ib nrab volts. Mus qhib, koj yuav tsum tau thov rau ib tug ko taw nti voltage, cov nqi ntawm uas tshaj 3.5V los tswj lub amplifier boards tshwm sim ib txhij, uas yog ib qho tseem ceeb rau cov schemes raws li lub hom choj, mus rau ib tug tswj tsev rau tag nrho cov theem.

Thaum lub hwj chim yog muab rau, tag nrho cov capacitors yog them los ntawm lub hwj huam mov. Tus tswj tsev kuj yog ib capacitor accumulates xwb. Thaum accumulating lub siab tshaj plaws tau them nyiaj mus tawm standby. Ib tug thib ob capacitor uas yog siv nyob rau hauv cov kev tswj chav tsev, yog lub luag hauj lwm rau cov hais tsis tau lus hom. Nws yog them ib tug me ntsis rau yav tom ntej, li ntawd, lub ntxhi hom puv tawm ntawm lub thib ob.