Lub diode yog ib qho khoom siv semiconductor, feem ntau yog siv rau kev kho thiab kev tswj hluav taws xob hauv Circuit Court. Thaum lub sijhawm ua haujlwm, vim muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov nyob rau hauv thiab tawm ntawm lub diode, ib qho kev poob qis yuav raug tsim tawm.
Cov kev poob no feem ntau hu ua rau pem hauv ntej voltage poob, thiab qhov cuam tshuam ntawm qhov tseem ceeb ntawm kev siv hluav taws xob thiab kev ruaj ntseg ntawm lub cev yuav tsum tau xav txog hauv kev tsim hluav taws xob tiag tiag. Txawm hais tias qhov kev poob ntawm lub diode muaj qee qhov kev noj, nws tsis tau txhais hais tias peb yuav tsum tsis txhob siv cov cuab yeej no. Ntawm qhov tsis sib xws, kev tsim hluav taws xob tsim nyog thiab kev ua kom zoo tuaj yeem txo qhov kev poob qis, yog li tau txais txiaj ntsig zoo, ruaj khov thiab hloov pauv kev ua haujlwm hauv Circuit Court. Hauv kev tsim hluav taws xob tiag tiag, peb tuaj yeem siv qee yam kev ntsuas los txo qhov kev poob ntawm lub diode.
Ua ntej, peb tuaj yeem xaiv cov khoom siv diode nrog qhov tsis tshua muaj hluav taws xob poob, uas tuaj yeem txo qis kev siv hluav taws xob los ntawm kev poob qis rau pem hauv ntej. Qhov thib ob, peb tuaj yeem ua kom zoo dua qhov kev ruaj ntseg thiab cov lus teb ceev ntawm lub voj voog los ntawm kev xaiv cov khoom tsim nyog xws li cov resistors thiab capacitors, thiaj li txo qis qhov conduction poob ntawm diode ntau npaum li qhov ua tau thaum ua haujlwm.
Lub conduction poob ntawm MOSFET yog proportional rau RDS (ON), thaum lub conduction poob ntawm diode nyob ntawm ntau yam nyob rau hauv pem hauv ntej conduction voltage (VF). Diodes feem ntau muaj kev poob ntau dua li MOSFETs, thiab qhov poob diode yog proportional rau pem hauv ntej tam sim no, VF thiab conduction lub sij hawm.Vim lub diode ua thaum lub MOSFET tawm, qhov conduction poob ntawm lub diode (PCOND (DIODE)) yog kwv yees li: PCOND (DIODE)=IDIODE(ON) × VF × (1 - D) Qhov twg IDIODE(ON) yog qhov nruab nrab tam sim no thaum lub sij hawm diode conduction. Raws li pom nyob rau hauv daim duab 2, qhov nruab nrab tam sim no thaum lub sij hawm diode conduction yog IOUT, yog li rau ib tug phaw converter, PCOND(DIODE) yuav kwv yees li nram no: PCOND(DIODE)=IOUT × VF × ({{4 }} VOUT/VIN) Tsis zoo li MOSFET lub zog suav, siv qhov nruab nrab tam sim no tuaj yeem muab cov txiaj ntsig kev ntsuas hluav taws xob ntau dua vim tias qhov poob diode yog proportional rau kuv, tsis yog I2. Obviously, qhov ntev ntawm MOSFET lossis diode nyob rau, qhov ntau dua qhov conduction poob.
Rau ib tug phaw converter, qhov qis qhov tso zis voltage, ntau dua lub zog dissipation nyob rau hauv lub diode vim nws nyob rau hauv lub xeev rau lub sij hawm ntev.
Yog tias koj muaj kev txaus siab rau kev hloov hluav taws xob, thov hu rau kuv, peb tuaj yeem hloov kho lub zog rau koj.
