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News › Driver de 200V pentru amplificatoare audio de pana la 3000W
AUDIO
National Semiconductor a adaugat un nou membru la familia sa de drivere de 200V pentru amplificatoare de putere. LME49810 este un singur integrat ce este inlocuitor pentru mai mult de 25 de componente discret in amplificatoarele audio de inalta putere. LME49810 contine toate etajele necesare pentru comanda unui amplificator de putere finala cu puteri de pana la 3000 W.


Acest integrat a fost proiectat pentru a comanda tranzistori (elemente discrete) de putere pentru sarcini de pana la 3000W.

Cand este implementat intr-un proiect de amplficator de putere acesta asigura un procent de distorsiuni THD+N is 0.0007 percent. Puterea de iesire a amplificatorului poate fi modificata prin variatia tensiunii de alimentare pentru putearea finala, diferite configuratii de iesire si selectarea tranzistorilor de putere. Integrat in driver este si un etaj Baker Clamp care ofera avantaje importante cand amplificatorul este supracomandat.
Cand amplificatorul se apropie de clipping etajul Baker Clamp minimizeaza distorsiunile si reduce sansele ca difuzoarele sa fie distruse.
LME49810 asigura un ritm de crestere slew rate de 50V/microsecond, o rejectie a riplului de pe alimentare de (PSRR) 110 dB si o plaja de operare a tensiunii de alimentare de la plus minus 20V pana la plus sau minus 100V. Pentru a preveni efectele de termen lung ale supraincalzirii, LME49810 are integrata o protectie termica ce se activeaza cand temperatura depaseste 150 grade celsius. De asemenea este prezent un circuit de mute. Este disponibil in capsula TO-247 cu 15 pini si este evaluat la 8.50US$ pentru cantitati de 100 buc.

Mai multe informatii la :
http://www.national.com/pf/LM/LME49810.html


Posted by daniel on Tuesday, July 31, 2007 (15:47:32) (5092 reads) [ Administration ]

"Driver de 200V pentru amplificatoare audio de pana la 3000W" | Login/Create an Account | 2 comments
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