Diodes Inc. npaj siab rau tus maub los tshiab kom haum rau cov ntawv thov uas yuav tsum muaj qhov hluav taws xob tsis tu ncua lossis tam sim no yuav tsum tau tsav cov duab thiab teeb pom kev.Nyob rau sab LCD, qhov no yuav suav nrog kev siv lub teeb rov qab rau LCD TVs, LCD saib, thiab vaj huam sib luag tiaj tus.Ntawm LED sab, qhov ntawd txhais tau tias siv los ua tus tsav tsheb LED rau kev lag luam teeb pom kev zoo.
Cov cuab yeej ua kom haum cov input voltages xws li 9V txog 40V.Qhov no tso cai rau nws yooj yim hloov mus rau ntau yam khoom siv hluav taws xob, xws li 12V, 24V, thiab 36V, yam tsis muaj kev teeb tsa ntxiv lossis tsis ua haujlwm.
Cov theem dimming yog tswj los ntawm digital PWM (pulse width modulation) input, uas yog hloov mus rau ib qho analog voltage kom tswj tau qhov tseeb dimming.AL3353 tuaj yeem txhawb nqa PWM cov cim nrog ntau zaus ntawm 5kHz txog 50kHz.
Tsis tas li ntawd, AL3353 tswj cov kab sib txawv ntawm qhov kub thiab txias thiab txheej txheem kev hloov pauv.Qhov no yog ua tiav los ntawm kev siv ntawm Diodes 'dynamic linearity them cov txheej txheem, uas siv cov offset tshem tawm chopping circuit.
AL3353 muaj PWM boost tsav tsheb uas siv hom kev tswj tam sim no thiab kev ua haujlwm ruaj khov los tswj cov LED tam sim no.LED tam sim no dhau los ntawm ib qho kev nkag siab tam sim no sab nraud.Qhov hluav taws xob thoob plaws qhov ntsuas qhov ntsuas yog tom qab ntawd muab piv nrog rau qib siv ntawm 400mV.Qhov sib txawv ntawm ob qhov hluav taws xob yog siv los tswj cov mem tes dav ntawm lub zog hloov hluav taws xob, thiab tso cai rau kev tswj xyuas qhov tam sim no ntws los ntawm LED.
Lub AL3353 kuj tseem siv tau rau hauv cov xwm txheej uas yuav tsum tau tswj cov zis hluav taws xob, tsis yog cov khoom siv tam sim no.Nws ua li ntawd los ntawm kev ntsuas nrog kev tawm tswv yim resistor network txuas nrog lub cuab yeej tso zis davhlau ya nyob twg.
Txhawm rau tiv thaiv nws tus kheej thiab LEDs nws tswj, AL3353 suav nrog qee qhov kev nyab xeeb tseem ceeb.Cov no suav nrog:
AL3353 tuaj yeem hloov tau ntau yam khoom sib cais thiab tuaj yeem txo cov nqi BOM, nrog rau txo qhov chaw ntawm lub rooj tsavxwm nrog nws qhov me me:
Muab qhov kev siv hluav taws xob no, nws tsis xav tias muaj lwm tus nkag mus rau hauv daim teb no.Thiab, thaum AL3353 muab ib qho kev tso tawm, qee cov tuam ntxhab muab cov khoom muaj txog li plaub qhov tawm.Nov yog qee qhov:
Post lub sij hawm: May-29-2019