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e hlahisa li-drive tsa backlight tsa koloi tse nang le li-converter tse kopaneng tsa boost ho amohela maemo a mocheso o tlase haholo

2021-07-09

Gage Automotive-Phupu 6th, Maxim Integrated Product e qala mocha oa li-channel tse 'nè, khatello e tlase, koloi ea morao-rao ea LED ea likoloi MAX25512. ka converter e kenyellelitsoeng ea boost.Ena ke eona feela tharollo e kopaneng e bolokang khanya e felletseng le e sa feleng ea ponts'o ea koloi esita le maemong a qalang a batang haholo a tlase joalo ka 3V input voltage.
One-chip LED drive e hlakola MOSFET ea kantle le sehanyetsi sa hona joale sa ho lemoha le ho kopanya puisano ea I²C ho fokotsa litšenyehelo tsa thepa le ho fokotsa sebaka sa boto ea potoloho ka 30%. Ka sehokelo sa I²C, lits'ebetso tsa tlhahlobo tse kang SHORT ho GND ho sebapi se seng le se seng sa hajoale se fana ka likhopotso ho microcontroller le litlhophiso ka 'ngoe tsa "pulse wide modulation" (PWM) ho netefatsa hore ponts'o e bolokehileng le ea boleng bo holimo. Ntle le moo, MAX25512 e na le mesebetsi e kopaneng ea hybrid dimmer ho fokotsa tšitiso ea motlakase (EMI) le ho ntlafatsa karo-karolelano ea dimmer.
O khanna o kenyelletsa likanale tse 'ne tsa 120mA tse nang le ts'ebetso e phahameng ka ho fetisisa indastering ha li sebetsa ka maqhubu a 2.2MHz, ho fihla ho 91%. MAX25512 e phuthetsoe ka lithapo tse nyane tse 24, 4mm x 4mm x 0.75mm square flat no pin (QFN). Koloi e fokotsehile ka 30% ka lebaka la kopanyo e phahameng le likarolo tse ka ntle tse hlakotsoeng.
Tsamaiso ea kajeno ea ho qala le ho emisa koloi e ntlafatsa moruo oa mafura, empa hape e etsa hore ho be thata bakeng sa tsamaiso ea phetiso ea matla ho boloka khanya e tšoanang ea pontšo ha e tsosolosoa hape. Mohlala, qalong, lits'ebetso tse joalo ka mabone a bonts'itsoeng li ka angoa ke tikoloho e batang ea ho qala, 'me enjene e sebelisa matla a feteletseng a betri ea koloi e etsa hore skrine e tingoe le ho buloa hape. Maxim Integrated's MAX25512 LED backlit drive e na le matla a tlase a ts'ebetso joalo ka 3V, kamora ho qala ntle le ho eketsa converter ea pre-boost ho sireletsa leihlo hore le se ke la sitisoa ke matla.
"Baetsi ba likoloi ba hloka li-drive tsa LED tse nang le kopanyo e phahameng ho fokotsa litšenyehelo tsa tharollo le sebaka sa PCB," ho boletse Szu-Kang Hsien, mookameli oa tsamaiso ea khoebo Maxim Integrated. Maxim Integrated's MAX25512 LED drive e fana ka boemo bo phahameng ka ho fetisisa ba ho kopanya le ho sebetsa hantle ho 2.2MHz switching frequencies."
Hatisa hape ho tsoa Sechabeng sa Gage Auto