Kev tsim ua haujlwm rau 5-nti lossis loj dua zaub LCD cov teeb pom kev zoo yuav nyuaj heev. Tus neeg tsav tsheb yuav tsum muaj lub hwjchim txuas nrog lub zog ntawm 10V txog 15V uas hu ua analog voltage ntaus ntws (AVDD) thiab ob lub hwjchim tawm (VGH thiab VGL) rau cov rooj tsav npav.
Feem ntau, koj tuaj yeem siv ib qho yooj yim LCD fais fab, xws li TPS65150-Q1 (tus automotive LCD / zaub biasing tov rau infotainment los yog pawg lus uas qhov yooj yim ua kom yooj yim rau koj tus qauv fais fab). Tab sis nws muaj lwm txoj kev los tsim cov qauv tsheb me me uas muaj peev xwm yuav txo tau qhov me me thiab BOM cov nqi siv tsawg dua qhov chaw tsav tsheb.
Daim duab 1: Tsoos LCD txwm siv lub hwj chim siv lub TPS65150-Q1
Yuav kom ua raws li txoj kev tsim tawm hauv kev tsim cov qauv ntawm cov xov tooj ntawm smartphones thiab ntsiav tshuaj (saib ib qho ntawm ib qho-inductor-cais kev sib faib sib faib TPS65132 rau cov ntaub ntawv) txog peb xyoos dhau los, ib txoj kev tsav tsheb tshiab tau tshwm sim nyob rau hauv lub ntiaj teb kev tsheb - qhov chaw Tus tsav tsheb npav tam sim no yuav tsum muaj AVDD (6.xV) tsheb nqaj hlau thiab qhov tsis zoo AVDD (-6.xV) tsheb nqaj hlau.
Xam 2: Txoj kev tshiab uas siv ib qho inductor nkaus xwb (raws li kev sib tsoo ntawm qhov kev sib tshuam xws li TPS65132)
Ob tog vaj huam sib luag thiab qhov chaw tsav tsheb nyiam qhov kev ua haujlwm ntawm kev txo cov khoom siv zog los ntawm kev siv cov nqi sib koom. Tsis tas li ntawd, txoj kev tshiab no tuaj yeem txuag tau nyiaj thiab txo qhov me me, vim hais tias tus neeg tsav tsheb tuaj yeem tswj tau ntau txoj hauv kev, uas tuaj yeem txo tus naj npawb ntawm qhov chaw tsav tsheb rau txhua qhov kev pom.
Thaum tsim cov khoom fais fab kev tswj hwm uas yuav tsum tau muaj +/- AVDD tsav, koj tuaj yeem yooj yim ntxiv rau koj cov qauv siv los ntawm kev siv TPS65131-Q1, kev sib txuas ntawm cov tshuab hluav taws xob zoo tshaj plaws uas ua tau raws li cov cai ntawm kev siv tsheb. Qhov yoojyim no muaj xws li ib tus naj npawb EN rau kev sib hloov ntawm ib qho yooj yim thiab ib qho sib tawm resistor los tsim cov nqi hluav taws xob cov nqi, muab qhov chaw tsav tsheb nrog cov + AVDD thiab-WBDD.
Rau cov qauv tsim qhov chaw tus neeg tsav tsheb tsis txuas rau VGH thiab VGL ntsia, txhim kho lub twj tso kua mis thiab ib qho kev tawm dag zog los txhawb cov kev taw qhia yuav txhawb nqa lub hwj chim nres los ntawm TPS65131-Q1. Yog xav paub seb yuav ua li cas rau nruab thiab pab kom cov kev tawm dag zog thiab seb koj tuaj yeem hloov lawv li cas rau koj tus qauv tom ntej, saib qhov TI Designs Reference Design (PMP9780).
