Taw qhia txog kev txhim kho Standby Efficiency ntawm Hloov Cov Khoom Siv Hluav Taws Xob
Txiav tawm qhov pib
Rau lub flyback fais fab mov, lub nti tswj tau siv los ntawm kev pab cuam winding tom qab pib, thiab qhov hluav taws xob poob thoob plaws qhov pib resistor yog txog 300V. Txhawm rau txhim kho qhov ua tau zoo ntawm kev ua haujlwm, lub 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 kev mob siab rau kev pib ua haujlwm, koj tuaj yeem txuas lub capacitor hauv series nrog cov pib resistor, thiab nws qhov poob tom qab pib tuaj yeem maj mam txo 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 voj voog tsuas tuaj yeem pib dua tom qab disconnecting lub input voltage thiab tso tawm lub capacitor.
Txo lub moos zaus
Lub moos zaus tuaj yeem txo qis los yog nrawm. Kev txo qis yog thaum cov lus tawm tswv yim tshaj li qhov pib ntawm tus nqi, los ntawm ib qho kev qhia tshwj xeeb, kom ua tiav cov kab qis hauv lub moos zaus.
Hloov hom kev ua haujlwm
QR → pWM Rau kev hloov cov khoom siv hluav taws xob ua haujlwm nyob rau hauv high-frequency hom, hloov mus rau low-frequency mode thaum standby txo qis standby. Piv txwv li, rau quasi-resonant switching fais fab mov (nrog rau kev khiav hauj lwm zaus ntawm ob peb puas kHz mus rau ob peb MHz), nws tuaj yeem hloov mus rau qhov qis-frequency pulse-width modulation control mode pWM (ob peb kaum ntawm kHz) thaum standby. IRIS40xx nti txhim kho kev ua haujlwm ntawm kev ua haujlwm los ntawm kev hloov ntawm QR thiab pWM. Thaum lub hwj huam mov yog nyob rau hauv lub teeb load thiab standby, lub auxiliary winding voltage yog me me, Q1 yog tawm, lub resonant teeb liab tsis tau kis mus rau lub FB davhlau ya nyob twg, lub FB voltage yog tsawg tshaj li ib tug voltage nyob rau hauv lub nti, uas yuav tsis tau. ua rau hom quasi-resonance, thiab Circuit Court ua haujlwm nyob rau hauv qis-frequency mem tes-width modulation control mode. pWM → pFM Rau qhov hloov hluav taws xob hloov pauv uas ua haujlwm hauv pWM hom thaum lub zog ntsuas ntsuas, qhov ua tau zoo ntawm cov khoom siv hluav taws xob standby tuaj yeem txhim kho los ntawm kev hloov mus rau pFM hom, piv txwv li, kev hloov kho ruaj khov yog siv los txhim kho qhov kev sib tw. efficiency. Txhim kho lub standby efficiency, piv txwv li, kho lub sij hawm tig-tawm thiab kho lub sij hawm tig-tawm, qhov qis load, lub sij hawm tig-tawm ntev dua thiab qis dua qhov kev khiav hauj lwm zaus. Lub teeb liab standby ntxiv rau nws cov pW / tus pin, uas yog siab nyob rau hauv cov kev ntsuas load thiab Circuit Court ua haujlwm nyob rau hauv pWM hom, thiab thaum lub load qis dua ib qho chaw pib, tus pin yog rub qis thiab Circuit Court ua haujlwm hauv pFM hom. Ua tiav qhov kev hloov ntawm pWM thiab pFM kuj tseem txhim kho qhov ua tau zoo ntawm lub zog hluav taws xob thaum lub teeb thauj khoom thiab lub xeev standby. Txo qhov kev ua haujlwm standby zaus thiab kev txhim kho standby efficiency yog ua tiav los ntawm kev txo lub moos zaus thiab hloov cov kev khiav hauj lwm hom, uas ua rau tus maub los ua haujlwm txhua lub sijhawm thiab cov zis tswj tau zoo thoob plaws hauv cov khoom thauj. Txawm tias thaum lub load surges los ntawm xoom mus rau tag nrho cov load, cov lus teb yog ceev thiab vice versa. Tso zis voltage poob thiab overshoot qhov tseem ceeb yog khaws cia nyob rau hauv cov kev txwv tso cai.
Tswj Burst Hom
(BurstMode) Tswj Pulse Hom, tseem hu ua SkipCycleMode, yog hais txog kev tswj hwm ntawm qee qhov ntawm lub voj voog los ntawm lub teeb liab nrog lub sij hawm loj dua lub sij hawm teev ntawm pWM maub los ua kom cov zis mem tes ntawm pWM ib ntus nquag lossis tsis ua haujlwm. Thaum nws nyob rau hauv qhov teeb meem ntawm lub teeb load lossis standby, yog li ntawd cov zis pulse ntawm pWM tuaj yeem ua kom nquag plias lossis tsis ua haujlwm ntawm qhov zaus tas mus li los ntawm kev txo cov sij hawm hloov pauv thiab nce lub voj voog ua haujlwm los txhim kho kev ua haujlwm ntawm lub teeb thiab standby. txhawm rau txhim kho kev ua haujlwm ntawm lub teeb load thiab standby. Lub teeb liab tuaj yeem muab ntxiv rau cov lus tawm tswv yim, pWM teeb liab tso tawm channel, pab tus pin ntawm pWM nti (piv txwv li, LM2618, L6565) lossis cov khoom siv sab hauv ntawm lub nti (piv txwv li, NCp1200, FSD200, L6565, thiab TinySwitch series chips ).
