fane Posted May 29, 2017 Share Posted May 29, 2017 (edited) Este un tv cu alimentare la 12v si banuiesc ca aprimit 24 are in sursa fr9888 care e puscat si nu gasesc decit fr9886 si nu sint sigur daca se pot inlocui direct au aceiasi configuratie la pini dar dupa datasheet si schema de aplicatie se pare ca sint ceva diferente,a incercat vreun coleg inlocuirea? Edited May 29, 2017 by fane Link to comment
leoncris Posted May 29, 2017 Share Posted May 29, 2017 (edited) fr9886 mai are ceva in coada ? La fr9886 pinul 6 este folosit pentru a compensa bucla de reglare , pe care fr9888 nu'l are , dar e limitat la 2A in timp ce fr9888 duce 3A. In rest ... verifici R1/R2 functie de Vout dorit. Alimenteaza din sursa externa si vezi ce curent ... haleste. Edited May 29, 2017 by leoncris Link to comment
fane Posted May 30, 2017 Author Share Posted May 30, 2017 (edited) totusi dupa datasheet pinul 6 ls smbele apare NC si in schemele de aplicatie?? oricum incerc tot una e pierd un ic Edited May 30, 2017 by fane Link to comment
leoncris Posted May 30, 2017 Share Posted May 30, 2017 (edited) http://www.datasheetspdf.com/mobile/870627/FR9886C.html http://aitendo3.sakura.ne.jp/aitendo_data/product_img/power/DC-DC/DC12-5V/FR9888.pdf Edited May 30, 2017 by leoncris Link to comment
fane Posted May 31, 2017 Author Share Posted May 31, 2017 curios tot pe al doilea sait am gasit si FR 9886 la care pin 6 este nc am sa verific pe itegratul nou daca prezinta ceva rezistenta intre pin 6 si ceilalti pini doar asa imi pot da seama care e datasheetul corect va multumesc pt indicatii Link to comment
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