Technical method ntawm kev txo hwj chim noj ntawm lub hwj chim siab switching fais fab mov
Tam sim no, thaum feem ntau cov khoom siv hluav taws xob hloov pauv los ntawm cov khoom ntsuas ntsuas mus rau lub teeb thauj khoom thiab lub xeev standby, lub zog siv hluav taws xob poob qis thiab qhov kev ua haujlwm standby tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua. Qhov no ua rau muaj kev sib tw tshiab rau cov kws tsim hluav taws xob tsim hluav taws xob.
Kev ntsuas hluav taws xob siv hluav taws xob hloov hluav taws xob
Txhawm rau txo qhov kev poob qis ntawm kev hloov pauv hluav taws xob thiab txhim kho qhov ua tau zoo ntawm qhov muag, qhov sib xyaw ntawm cov khoom siv hluav taws xob hloov pauv yuav tsum tau txheeb xyuas ua ntej. Siv lub flyback fais fab mov ua piv txwv, nws qhov kev poob haujlwm feem ntau yog raws li hauv qab no: MOSFET conduction poob.
Nyob rau hauv lub xeev standby, tam sim no ntawm lub ntsiab Circuit Court yog me me, lub ON lub sij hawm ntawm MOSFET yog me me, thiab lub Circuit Court ua hauj lwm nyob rau hauv DCM hom, yog li qhov cuam tshuam conduction poob thiab theem nrab rectifier poob yog me me. Lub sij hawm no, qhov poob yog tsim los ntawm parasitic capacitance poob, hloov sib tshooj poob thiab pib tsis kam.
Hloov sib tshooj poob, PWM maub los thiab nws pib tsis kam, tso zis rectifier poob, clamp tiv thaiv Circuit Court poob, tawm tswv yim Circuit Court poob, thiab lwm yam. nyob rau lub sijhawm unit.
Cov txheej txheem ntawm kev txhim kho standby efficiency ntawm switching fais fab mov
Raws li kev soj ntsuam poob, txiav tawm qhov pib resistor, txo qhov kev hloov pauv zaus thiab hloov lub sij hawm tuaj yeem txo qhov kev poob qis thiab txhim kho qhov kev ua haujlwm ntawm kev ua haujlwm. Cov txheej txheem tshwj xeeb yog: txo lub moos zaus; Hloov ntawm hom kev ua haujlwm siab mus rau qhov ua haujlwm tsawg zaus, xws li QuasiResonant hom (QR) rau PulseWidthModulation (PWM), thiab mem tes dav hloov mus rau PulseFrequencyModulation (PFM); Tswj BurstMode.
Txiav tawm qhov pib tsis kam
Rau lub flyback fais fab mov, lub nti tswj yog powered los ntawm lub koom haum pab winding tom qab pib, thiab qhov voltage poob ntawm tus pib resistor yog hais txog 300V V. Cia qhov pib kuj yog 47kΩ, thiab lub zog noj yog ze li ntawm 2W. Txhawm rau txhim kho qhov ua tau zoo ntawm kev ua haujlwm, cov channel tiv thaiv yuav tsum raug txiav tawm tom qab pib. TOPSWITCH, ICE2DS02G muaj qhov pib tshwj xeeb hauv Circuit Court, 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 hauv series nrog cov pib resistor, thiab qhov poob tom qab pib yuav 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 Circuit Court tsuas tuaj yeem rov pib dua tom qab qhov hluav taws xob tawm hluav taws xob raug txiav tawm thiab lub capacitor raug tso tawm.
