Rov qab tam sim no yog thaum qhov hluav taws xob ntawm qhov tso tawm ntawm lub kaw lus siab dua qhov hluav taws xob ntawm cov tswv yim, ua rau tam sim no ntws los ntawm lub kaw lus nyob rau hauv qhov kev taw qhia rov qab.
Qhov chaw:
1. lub cev diode ua rau pem hauv ntej biased thaum lub MOSFET yog siv rau load switching daim ntaub ntawv.
2. ib qho kev poob tam sim ntawd hauv qhov hluav taws xob input thaum lub hwj huam mov raug txiav tawm ntawm qhov system.
Lub sijhawm uas rov qab thaiv tam sim no yuav tsum tau xav txog:
1. thaum lub hwj chim multiplexed mov yog MOS tswj
2. ORing tswj.ORing zoo ib yam li lub hwj chim multiplexing, tshwj tsis yog tias tsis yog xaiv lub hwj huam mov rau lub zog, qhov hluav taws xob siab tshaj plaws yog ib txwm siv los txhawb lub zog.
3. qeeb voltage poob thaum lub hwj chim poob, tshwj xeeb tshaj yog thaum cov zis capacitance ntau loj dua lub input capacitance.
Kev phom sij:
1. Rov qab tam sim no tuaj yeem ua rau cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob puas
2. thim rov qab spikes tam sim no tuaj yeem ua rau cov cables thiab cov khoom sib txuas puas
3. lub cev diode ntawm MOS nce hauv kev siv hluav taws xob thiab tuaj yeem raug puas tsuaj
Optimization txoj kev:
1. Siv diodes
Diodes, tshwj xeeb tshaj yog Schottky diodes, yog ib txwm tiv thaiv tawm tsam rov qab tam sim no thiab rov qab polarity, tab sis lawv yog cov kim, muaj siab thim rov qab tam sim no, thiab yuav tsum tau kub dissipation.
2. Siv rov qab-rau-rov qab MOS
Ob qho kev qhia tuaj yeem raug thaiv, tab sis nyob hauv thaj chaw loj ntawm lub rooj tsavxwm, siab conduction impedance, tus nqi siab.
Nyob rau hauv daim duab hauv qab no, tus tswj transistor conduction, nws collector yog tsawg, ob PMOS conduction, thaum lub transistor tawm, yog hais tias cov zis yog siab tshaj lub input, sab xis ntawm lub MOS lub cev diode conduction, thiaj li hais tias cov theem D yog. siab, ua rau G qib siab, sab laug ntawm MOS lub cev diode tsis dhau, thiab tib lub sijhawm, vim tias MOS ntawm VSG rau lub cev diode voltage poob tsis mus txog qhov pib voltage, yog li qhov ob lub MOS kaw, uas thaiv cov zis rau cov khoom siv tam sim no.Qhov no thaiv qhov tam sim no los ntawm cov zis mus rau qhov kev tawm tswv yim.
3. Rov qab MOS
Rov qab MOS tuaj yeem thaiv cov zis tawm mus rau cov tswv yim ntawm qhov rov qab tam sim no, tab sis qhov tsis zoo yog tias ib txwm muaj lub cev diode txoj hauv kev los ntawm kev tawm tswv yim mus rau qhov tso zis, thiab tsis ntse txaus, thaum cov zis ntau dua qhov kev tawm tswv yim, tsis tuaj yeem tig. tawm ntawm MOS, tab sis kuj yuav tsum tau ntxiv ib qho hluav taws xob sib piv Circuit Court, yog li tom qab ntawd muaj qhov zoo tshaj plaws diode.
4. Load hloov
5. Multiplexing
Multiplexing: xaiv ib qho ntawm ob lossis ntau qhov khoom siv nkag los ntawm nruab nrab ntawm lawv kom muaj zog ib qho kev tso zis.
6. Zoo tagnrho Diode
Muaj ob lub hom phiaj hauv kev tsim ib qho zoo tagnrho diode, ib qho yog simulate Schottky thiab lwm qhov yog tias yuav tsum muaj kev sib piv ntawm cov khoom siv hluav taws xob kom tig tawm rov qab.
Post lub sij hawm: Aug-10-2023