Txoj kev rau standby efficiency txhim kho cov hloov hom fais fab mov
txiav tawm pib
Rau lub flyback fais fab mov, lub nti tswj yog powered los ntawm lub pab winding tom qab pib, thiab qhov voltage poob nyob rau hauv lub startup resistor yog hais txog 300V. Piv txwv tias tus nqi ntawm qhov pib resistor yog 47kΩ, lub zog siv ze li ntawm 2W. Txhawm rau txhim kho standby efficiency, qhov resistor channel yuav tsum raug txiav tawm tom qab pib. TopSWITCH, ICE2DS02G muaj ib qho kev pib tshwj xeeb hauv Circuit Court, uas tuaj yeem tua cov resistor tom qab pib. Yog hais tias tus maub los tsis muaj lub siab xav pib Circuit Court, lub capacitor kuj tseem tuaj yeem txuas nrog hauv series nrog cov pib resistor, thiab qhov poob tom qab pib tuaj yeem maj mam poob mus rau xoom. Qhov tsis zoo yog tias cov khoom siv hluav taws xob tsis tuaj yeem rov pib dua nws tus kheej. Lub Circuit Court tsuas tuaj yeem pib dua tom qab qhov hluav taws xob input raug txiav thiab lub capacitor raug tso tawm.
Txo lub moos zaus
Lub moos zaus tuaj yeem poob zoo lossis dheev. Kev poob qis txhais tau hais tias thaum cov lus tawm tswv yim ntau tshaj qhov pib, qhov kev txo qis hauv lub moos zaus tau ua tiav los ntawm ib qho tshwj xeeb module.
Hloov ua haujlwm hom
1. QR → pWM Rau kev hloov cov khoom siv hluav taws xob ua haujlwm nyob rau hauv high-frequency kev khiav hauj lwm hom, hloov mus rau low-frequency kev khiav hauj lwm hom thaum standby yuav txo tau standby poob. Piv txwv li, rau quasi-resonant switching fais fab mov (ua hauj lwm zaus yog ob peb puas kHz rau ob peb MHz), nws muaj peev xwm hloov mus rau lub low-frequency pulse width modulation control mode pWM (tens of kHz) thaum standby. Lub IRIS40xx nti txhim kho kev ua haujlwm ntawm kev ua haujlwm los ntawm QR thiab pWM hloov pauv. Thaum cov khoom siv hluav taws xob nyob ntawm lub teeb load thiab standby, lub auxiliary winding voltage me me, Q1 raug kaw, thiab lub teeb liab resonant tsis tuaj yeem xa mus rau FB davhlau ya nyob twg. Qhov hluav taws xob FB yog tsawg dua qhov pib hluav taws xob hauv lub nti, thiab hom quasi-resonant tsis tuaj yeem tshwm sim, thiab lub voj voog ua haujlwm ntawm qhov qis dua. Pulse width modulation tswj hom.
2. pWM → pFM Rau kev hloov cov khoom siv hluav taws xob ua haujlwm hauv pWM hom ntawm lub zog ntsuas, qhov kev ua haujlwm zoo tuaj yeem txhim kho los ntawm kev hloov mus rau pFM hom, uas yog, kho lub sijhawm tig thiab kho lub sijhawm tig tawm. Qhov qis dua, lub sijhawm tig-tawm ntev dua, thiab siab dua qhov ua haujlwm zaus. Tsawg. Ntxiv cov teeb liab standby rau nws pW/pin. Nyob rau hauv cov kev ntsuas load, tus pin no yog qib siab, thiab lub Circuit Court ua haujlwm hauv pWM hom. Thaum lub load qis dua ib qho chaw pib, tus pin no tau rub mus rau theem qis. , Circuit Court ua haujlwm hauv pFM hom. Realizing switching ntawm pWM thiab pFM txhim kho lub zog efficiency thaum lub teeb load thiab standby lub xeev. Los ntawm kev txo lub moos zaus thiab hloov cov kev khiav hauj lwm hom, lub standby kev khiav hauj lwm zaus yog txo thiab cov standby efficiency yog zoo dua. Cov maub los tuaj yeem khaws cia khiav thiab cov zis tuaj yeem hloov kho kom zoo thoob plaws tag nrho cov khoom thauj. Muaj peev xwm teb sai sai txawm tias thaum thauj khoom nce ntawm xoom mus rau tag nrho cov load thiab rov ua dua. Qhov tso zis voltage poob thiab overshoot qhov tseem ceeb yog khaws cia nyob rau hauv qhov kev tso cai.
Tswj pulse hom
(BurstMode) tswj pulse hom, tseem hu ua hla lub voj voog tswj hom (SkipCycleMode), txhais tau hais tias thaum nws nyob rau hauv lub teeb load lossis standby tej yam kev mob, lub teeb liab nrog lub voj voog loj dua pWM maub los moos moos tswj tau qee qhov txuas ntawm lub voj voog, ua rau pWM Cov zis pulse yog ib ntus siv tau lossis tsis raug, yog li ntawd qhov ua tau zoo ntawm lub teeb load thiab standby tuaj yeem txhim kho los ntawm kev txo tus naj npawb ntawm cov keyboards thiab nce lub voj voog ua haujlwm ntawm qhov zaus. Cov teeb liab no tuaj yeem muab ntxiv rau cov lus tawm tswv yim, pWM teeb liab tso tawm channel, pab tus pin ntawm pWM nti (xws li LM2618, L6565) lossis cov khoom siv sab hauv ntawm lub nti (xws li NCp1200, FSD200, L6565 thiab TinySwitch series chips).
