Txoj Kev Txhim Kho Standby Efficiency ntawm Stabilized Power Supply
txiav pib
Rau lub flyback fais fab mov, lub nti tswj yog powered los ntawm lub pab winding tom qab pib, thiab qhov voltage poob ntawm lub startup resistor yog hais txog 300V. Piv txwv tias qhov pib tsis kam 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 qhov tshwj xeeb pib hluav taws xob sab hauv, uas tuaj yeem tua cov resistor tom qab pib. Yog hais tias tus maub los tsis muaj qhov tshwj xeeb pib Circuit Court, lub capacitor kuj tseem tuaj yeem txuas nrog cov khoom pib, 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, thiab lub Circuit Court tsuas tuaj yeem pib dua tom qab disconnecting lub input voltage kom tawm lub capacitor.
txo moos zaus
Lub moos zaus tuaj yeem ua kom nrawm nrawm lossis nrawm. Kev poob qis txhais tau hais tias thaum cov lus tawm tswv yim tshaj li qhov pib, lub moos zaus yog linearly txo los ntawm ib qho module tshwj xeeb.
hloov ua haujlwm hom
1. QR → pWM Rau kev hloov cov khoom siv hluav taws xob ua haujlwm nyob rau hauv hom high-frequency, hloov mus rau hom qis zaus thaum lub sijhawm standby tuaj yeem txo qhov poob. Piv txwv li, rau quasi-resonant switching fais fab mov (ua hauj lwm zaus ntawm ob peb puas kHz mus rau ob peb MHz), nws muaj peev xwm hloov mus rau ib tug tsawg-frequency mem tes dav modulation tswj hom pWM (txog kaum ntawm kHz) thaum standby. Lub IRIS40xx nti txhim kho qhov ua tau zoo ntawm kev ua haujlwm los ntawm kev hloov ntawm QR thiab pWM. Thaum lub hwj chim mov nyob rau hauv lub teeb load thiab standby hom, qhov voltage ntawm lub auxiliary winding yog me me, Q1 yog muab tua, thiab lub resonance teeb liab tsis tau xa mus rau lub FB davhlau ya nyob twg. FB voltage qis dua qhov pib voltage hauv lub nti, thiab hom quasi-resonance tsis tuaj yeem tshwm sim, thiab Circuit Court ua haujlwm ntawm qhov tsawg zaus. PWM control mode. 2. pWM → pFM Rau kev hloov cov khoom siv hluav taws xob uas ua haujlwm hauv pWM hom ntawm lub zog ntsuas, qhov kev ua haujlwm standby kuj tuaj yeem txhim kho los ntawm kev hloov mus rau pFM hom, uas yog, kho lub sijhawm thiab kho lub sijhawm off-time. Qhov qis dua qhov load, lub sijhawm ua haujlwm ntev dua thiab ua haujlwm ntau dua. Tsawg. Ntxiv cov teeb liab standby rau nws pW / tus pin, nyob rau hauv cov kev ntsuas load, tus pin yog siab, lub Circuit Court ua hauj lwm nyob rau hauv pWM hom, thaum lub load yog qis dua ib tug tej yam pib, tus pin yog rub tsawg, lub Circuit Court ua hauj lwm nyob rau hauv pFM hom. Kev paub txog kev hloov ntawm pWM thiab pFM kuj tseem txhim kho cov khoom siv hluav taws xob zoo thaum lub teeb thauj khoom thiab lub xeev standby. Los ntawm kev txo lub moos zaus thiab hloov cov kev ua haujlwm, qhov kev ua haujlwm standby zaus tuaj yeem raug txo, qhov kev ua haujlwm standby tuaj yeem txhim kho, tus maub los tuaj yeem khaws cia khiav, thiab cov khoom tso tawm tuaj yeem tswj tau zoo nyob rau hauv tag nrho cov load ntau. Teb sai heev txawm tias thaum lub load surges los ntawm xoom mus rau tag nrho load thiab vice versa. Qhov tso zis voltage poob thiab overshoot qhov tseem ceeb yog khaws cia nyob rau hauv qhov kev tso cai.
Controllable Pulse Hom
Cov hom mem tes controllable, tseem hu ua hla lub voj voog tswj hom, txhais tau hais tias thaum nws nyob rau hauv lub teeb load lossis standby mob, ib qho kev txuas ntawm Circuit Court yog tswj los ntawm lub teeb liab uas nws lub sij hawm loj dua lub sij hawm teev ntawm PWM maub los, yog li ntawd. tias cov zis pulse ntawm PWM yog ib ntus zoo. Los yog tsis ua hauj lwm, yog li ntawd qhov ua tau zoo ntawm lub teeb load thiab standby tuaj yeem txhim kho los ntawm kev txo tus lej ntawm cov keyboards thiab nce lub luag haujlwm ntawm lub voj voog ntawm qhov zaus. Cov teeb liab no tuaj yeem muab ntxiv rau cov lus tawm tswv yim, pWM teeb liab tso tawm channel, pab txhawb tus pin ntawm pWM nti (xws li LM2618, L6565) lossis sab hauv ntawm lub nti (xws li NCp1200, FSD200, L6565 thiab TinySwitch series chips).
