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Forum › Audio › Amplificatoare › Sursa U neg
Sursa U neg
Discutii despre amplificatoare audio.
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adypreda



Joined: Dec 01, 2006
Posts: 2

PostPosted: 01/Dec/2006 4:32 pm    Post subject: Sursa U neg Reply with quote

Stie careva vreun integrat de genu lui lm337 ( tensiune negativa)
care sa functioneze la vreo 3 A

Am gasit lm333 prin niste cataloage dar nu gasesc sa-l cumpar.
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donpetrisor



Joined: Oct 30, 2006
Posts: 17

PostPosted: 02/Jan/2007 9:48 pm    Post subject: Reply with quote

Poti sa folosesti doua sau trei bucati de circuite LM337 in paralel (capsula TO220), echilibrate cu o rezistenta de circa 0,22 Ohmi fiecare. In acest caz puterea disipata de cele trei CI nu trebuie sa depaseasca 45W. E cea mai ieftina solutie Exclamation Exclamation Exclamation Ar mai fi si solutia cu LM337, capsula TO-3, dar e mai greu de gasit si e mai scump. BAFTA
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gabitzu



Joined: May 22, 2008
Posts: 1

PostPosted: 22/May/2008 11:35 am    Post subject: Re: Sursa U neg Reply with quote

am si eu o intrebare.sunt mai nou in domeniu...:P mai degraba invatacel...dak vreau sa montez mai multe amplificatoare(de ex.6)tre sa le bag filtraj la fiecare,nu?
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Adr1aN



Joined: Mar 04, 2007
Posts: 16

PostPosted: 09/Sep/2008 7:13 pm    Post subject: Re: Sursa U neg Reply with quote

daca te referi la filtrajul din alimentare .. este de ajuns 1 punte si niste condensatori sanatosi .. daca vrei sa alimentezi 6 amplifuri .. insa fi atent ca va trebui sa fie transformatorul destul de sanatos .. la fel ca si celelalte conponente - punte si condensatoare
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viteooky



Joined: Mar 20, 2008
Posts: 1

PostPosted: 09/Sep/2008 8:19 pm    Post subject: Re: Sursa U neg Reply with quote

cer scuza ca nui la tema dar zicetimi cineva de jonctiunea n-p cei cu ea ?
ms
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