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100W sa samo dva tranzistora

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100W sa samo dva tranzistora
apexaudio Offline
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#41
07-22-2015, 04:42 PM
(07-22-2015, 04:34 PM)ivanlukic Wrote: Na shemi su dva konda po 100pF dok je na Olafovoj pločici jedan od 100pF i jedan od 10pF. Olaf je na pločici stavio otpornike od 22k dok su nashemi 12k.

Olaf je u istom postu gde je podelio plocicu postavio i semu po kojoj je plocica dizajnirana i sve se slaze.
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TDA Offline
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#42
07-24-2015, 02:51 PM (This post was last modified: 07-24-2015, 02:51 PM by TDA.)
Evo na brzaka nacrtane pločice za APEX A4.
Dajte predloge za poboljšanje. Smile

.lay6   APEX A4.lay6 (Size: 135,26 KB / Downloads: 6)
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ivanlukic Offline
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#43
07-24-2015, 04:10 PM
Dobro je što još nisam počeo da radim na ovom projektu!
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#44
07-24-2015, 07:10 PM
(07-24-2015, 02:51 PM)TDA Wrote: Evo na brzaka nacrtane pločice za APEX A4.
Dajte predloge za poboljšanje. Smile

Za pocetak ispravi greske, video sam dve na prvi pogled: zajednicki spoj zener dioda nije spojen na izlaz pojacala i izlaz pojacala je pogresno spojen na izlaz OP-a...
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#45
Big Grin  07-24-2015, 07:10 PM (This post was last modified: 07-24-2015, 07:11 PM by fokussd.)
(07-24-2015, 02:51 PM)TDA Wrote: Evo na brzaka nacrtane pločice za APEX A4.
Dajte predloge za poboljšanje. Smile

Veliki elektroliti su povezani naopako.
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#46
07-24-2015, 10:20 PM
Evo brze ispravke pa ću sutra ozbiljnije preraditi PCB...
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apexaudio Offline
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#47
07-25-2015, 09:46 AM
(07-24-2015, 10:20 PM)TDA Wrote: Evo brze ispravke pa ću sutra ozbiljnije preraditi PCB...

Bacio sam poged i video gresku...

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samuki Offline
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#48
07-25-2015, 10:41 AM

.lay6   APEX A4.lay6 (Size: 135,36 KB / Downloads: 3) ovako.


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apexaudio Offline
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#49
07-25-2015, 12:37 PM
(07-25-2015, 10:41 AM)samuki Wrote: ovako.

Opet je pogresno spojen OP... moram da smislim nesto jednostavnije, za ovo pojacalo je tesko nacrtati plocicu Smile
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#50
07-25-2015, 12:40 PM


.lay6   APEX A4.lay6 (Size: 138,45 KB / Downloads: 6)
Ovo bi trebalo da radi.
Mrzi me da dodatno šminkam ili sabijam pločicu.
Uz još malo truda može se sabiti na 80x60mm sa 90x70mm kolika je sada.

Zanimljivo bi bilo da uklonim elektrolite i osigurače sa pločice i da tranzistore preselim sa donje strane kako bi cela pločica mogla da se montira na hladnjak.
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#51
07-25-2015, 12:52 PM
Evo jedne lepo spakovane plocice za A2 koja moze da posluzi kao osnova...

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#52
07-25-2015, 01:02 PM (This post was last modified: 07-25-2015, 01:03 PM by apexaudio.)
Plivajuci napon OP-a moze da posluzi za ukljucivanje MOSFET-ova za H klasu kao kod HX11... ako test prodje pozitivno bice i ove verzije.
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#53
08-17-2015, 07:32 PM
Interesantna je i verzija sa lateralnim mosfetovima u izlazu umesto darlingtona...

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#54
08-17-2015, 08:46 PM
Proverio sam A4 u LT Spice... verovatno moze i bolje.


.asc   Apex A4_rev2 (1).asc (Size: 8,12 KB / Downloads: 12)
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#55
11-12-2015, 10:44 AM (This post was last modified: 11-12-2015, 10:53 AM by apexaudio.)
Najnovija verzija u simulatoru, ako neko moze da proveri uradicu i prototip. Niko se nije zainteresovao iako je meni ova topologija veoma interesantna.

.asc   Apexaudio A2.asc (Size: 7,16 KB / Downloads: 12)
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#56
11-18-2015, 11:01 PM
Tery je uradio plocice za A2, nadam se da ce mu ovog puta proraditi, ako ne moracu ja da uradim prototip i proverim simulaciju.

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#57
11-20-2015, 07:07 PM
Terry-jeva plocica precrtana sa oznacenim vrednostima elemenata.

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#58
11-21-2015, 02:52 PM
Terry je uspesno testirao pojacalo, potrebne su neke modifikacije ali u principu radi tako da je sada moguce na najbolji nacin iskoristiti moderne OP ampove sa superirornim karakteristikama da direktno pobudjuju izlazne tranzistore bez VAS stepena izmedju.

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#59
11-21-2015, 03:02 PM
Umesto ovih skupih mosfeta mogu se upotrebiti neki jeftini darlingtoni TIP142/147 ili neki u TO220 kucistu kao BDX33C/34C...
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#60
12-16-2015, 01:20 AM (This post was last modified: 12-16-2015, 01:21 AM by apexaudio.)
Kad sam radio zastitu sa mosfet relejima zbog jednostavnosti sam odlucio da prekidam masu zvucnika kako da bi se izbegle komplikacije sa plivajucom pobudom, a kod pojacala AX2 je izlaz pojacala uzemljen kako bi se plivajucim napajanjem OP-a kompletno izbegao VAS stepen Smile



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