Lub L6562 nti tuaj yeem siv tau rau hauv LED hloov cov khoom siv hluav taws xob, tshwj xeeb tshaj yog hauv kev txhim kho lub zog thiab kev siv hluav taws xob.
1. Feature Compatibility Analysis
Raws li qhov siab -precision power factor correction (PFC) controller, L6562's core function is to optimize the input tam sim no waveform, enables the power system to achieve a power factor close to 1 thiab txo cov kab sib chaws sib haum xeeb. Cov yam ntxwv no ua tau zoo kawg nkaus nrog kev ua haujlwm siab thiab lub zog- txuag cov kev xav tau hais txog hauv LED hloov hluav taws xob khoom siv. Txij li thaum LED tsav tsheb fais fab khoom siv feem ntau yuav tsum tau ua kom tau raws li cov qauv kev siv hluav taws xob thoob ntiaj teb (xws li IEC 61000-3-2), siv L6562 tuaj yeem txhim kho qhov kev ua tau zoo ntawm tag nrho cov hluav taws xob, ua tau raws li qhov yuav tsum tau ua kom qis thiab ruaj khov ntawm LED daim ntawv thov.
2. Cov xwm txheej ntawm daim ntawv thov
Hauv ib qho -theem flyback PFC topologies, L6562 feem ntau teeb tsa nyob rau hauv pem hauv ntej kawg ntawm lub Circuit Court, ncaj qha tswj lub ntsiab hloov pauv transistor (xws li MOSFET) kom ua tiav qhov kev hloov pauv txuas ntxiv ntawm cov tswv yim tam sim no. Qhov kev tsim no tuaj yeem txhim kho lub zog ua kom muaj zog tshaj 0.95, thaum ua tiav qhov dav input voltage ntau (85-265V AC) los ntawm kev tsim- hauv qhov sib npaug. Nws feem ntau yog ua ke nrog qhov tsis tu ncua -tam sim no tswj DC-DC converter theem (xws li LLC lossis Buck Circuit Court) kom phim cov tsav tam sim no ntawm LED chips.
3. Kev txiav txim siab tsim
Hauv kev siv cov tswv yim, nws yog ib qho tseem ceeb uas yuav tsum tau ua tib zoo saib xyuas qhov tseeb ntawm qhov ntsuas tam sim no thiab lub voj ruaj khov. Piv txwv li, nyob rau hauv L6562 peripheral Circuit Court tsim, kev xaiv ntawm tam sim no sensing resistor yuav cuam tshuam rau lub overcurrent tiv thaiv pib; thiab cov kev teeb tsa tsis raug ntawm cov nyiaj them poob haujlwm (xws li lwm lub RC network txuas nrog lub tswv yim tus pin) yuav tsum tau hloov kho raws li cov yam ntxwv tshwj xeeb kom tsis txhob muaj qhov system oscillation. Hauv cov ntawv thov raug, cov neeg tsim qauv feem ntau siv nws xoom- tam sim no sensing (ZCD) muaj nuj nqi kom ua tiav quasi-resonant kev khiav hauj lwm hom, ntxiv txo kev poob poob.
