Cov ntsiab lus tseem ceeb ntawm kab lus no.
Txij li thaum tus pin assignments ntawm TO-247-4L pob nrog tus tsav tsheb qhov pins thiab TO-247N pob tsis muaj tus tsav tsheb qhov pins txawv, yuav tsum tau saib xyuas thaum tsim cov qauv.
Thaum TO-247-4L txuas nrog tus tsav lub rooj vag, txoj hlua yuav tsum hla vim yog txoj haujlwm tus pin, thiab nws tsis tuaj yeem teeb tsa lawv ntawm tib qhov chaw, yog li OUT teeb liab thiab GND2 teeb liab yuav tsim ob loops, thiab surges yuav raug generated nyob ntawm lub voj cheeb tsam thiab nws piv.
Raws li kev ntsuas ntsuas, nws yog ib qho tsim nyog yuav tsum txo lub voj voog ntau li ntau tau thiab ua kom thaj tsam ntawm lub voj (1) thiab voj (2) sib npaug. Tsis tas li ntawd, nws yog ib qho tsim nyog yuav tau txiav txim siab ntxiv qhov yooj yim surge suppression circuit lossis txawm tias tsis muaj hluav taws xob.
Hauv tsab xov xwm no, peb yuav tham txog kev txiav txim siab ntsig txog kev teeb tsa lub rooj tsav xwm rau TO-247-4L pob khoom nrog tus tsav tsheb qhov pins. Txij li thaum tus pin txoj haujlwm ntawm TO-247-4L txawv ntawm cov khoom siv sib txawv, yuav tsum tau them nyiaj rau qhov kev teeb tsa thiab xaim.
Kev ceev faj rau kev teeb tsa Circuit Court board thiab xaim ntawm TO-247-4L nrog tus tsav tsheb-qhov pins
Txoj haujlwm tus pin ntawm TO-247-4L nrog tus tsav tsheb-qhov chaw pins txawv ntawm cov qauv TO-247N, raws li tau piav nyob rau hauv tsab xov xwm "Package nrog Tsav Tsheb-Source Pins". Daim duab qhia tus pin rau TO-247N, TO-247-4L nrog tus tsav tsheb qhov chaw pins, thiab TO-263-7L tau qhia ntawm no dua.
Lub rooj vag pins ntawm TO-247-4L yog nyob rau sab xis sab xis tig mus rau saum npoo, thaum lub rooj vag pins ntawm cov pa TO-247N pob yog nyob rau sab laug sab. MOSFETs feem ntau yog tsav los ntawm tus tsav tsheb ICs, tab sis feem ntau tsav tsheb ICs muaj tus pin assignments uas tsim nyog rau cov pa TO-247N pob. Hauv qab no yog ib qho piv txwv ntawm MOSFET kab kos duab thaum siv ROHM tsav IC BM61S40RFV-C.
Nyob rau hauv rooj plaub ntawm TO-247N, MOSFET tsav teeb liab OUT thiab Rov qab teeb liab GND2 tau teeb tsa tib yam li lub rooj vag thiab qhov chaw pins, yog li lawv tuaj yeem xaim nyob rau tib lub sijhawm ntawm tib qhov chaw.
Nyob rau hauv sib piv, nyob rau hauv lub TO-247-4L pob, lub rooj vag pins thiab tsav tsheb qhov chaw pins yog teem nyob rau hauv lub opposite Order rau tus tsav tsheb IC pins, raws li qhia nyob rau hauv daim duab, thiab cov hlau yuav tsum hla thiab tsis tau configured ntawm lub tib lub ntsej muag. Yog li ntawd, raws li qhia hauv daim duab, OUT teeb liab thiab GND2 teeb liab tsim ob lub voj, thiab qhov sib piv ntawm thaj tsam ntawm lub voj (1) thiab (2) yuav tsum tau muab sau tseg.
Feem ntau, MOSFETs hauv TO-247-4L pob khoom siv nyob rau hauv ib puag ncig nrog cov nqi loj dID/dt. Thaum qhov hloov pauv hloov pauv (dΦ / dt) tshwm sim los ntawm nws qhov kev hloov pauv tam sim no yog orthogonal rau lub voj voog no, qhov hluav taws xob muaj peev xwm sib npaug rau lub voj voog ntawm lub voj voog ntawm tus tsav tsheb. Thiab, ntawm qee lub voj voog qhov sib piv ntawm lub rooj vag thiab qhov chaw ntawm MOSFET, cov nqi hluav taws xob qee zaum mus txog qib uas yuav ua rau muaj teeb meem xws li kev nce siab zoo thiab qhov tsis zoo. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum ua kom lub voj voog cheeb tsam tsim los ntawm OUT teeb liab thiab GND2 teeb liab me me li sai tau thiab ua kom thaj tsam ntawm lub voj (1) thiab voj (2) sib npaug.
Tus pin txoj haujlwm ntawm TO-263-7L pob yog tib yam li ntawm TO-247N, yog li ob lub voj voog zoo li TO-247-4L tsis tuaj yeem tsim, yog li kev xaim tuaj yeem ua tau siv tib txoj kev ua pa. Txawm li cas los xij, txij li ROHM tus tsav tsheb ICs tau nruab nrog GND2 pins ntawm ob sab ntawm lub teeb liab tsav OUT tus pins (pins 1 thiab 5), lawv tuaj yeem xaim siv tib txoj kev raws li cov khoom siv, txawm tias nyob hauv TO-247-4L pob.
Tsis tas li ntawd, qhov sib ntxiv ntawm VGS surge suppression circuit tau raug qhia hauv qee cov ntawv dhau los, tab sis txawm li ntawd los, VGS surge tseem tseem tuaj yeem tshaj qhov VGS qhov ntsuas vim lub suab nrov ntawm VDS kaw. Nyob rau hauv cov ntaub ntawv no, VGS surges yuav tsum suppressed nyob rau hauv lub rated ntau yam los ntawm kev txo cov hlau impedance los ntawm HVdc los yog ntxiv anti-surge countermeasures xws li buffering circuits rau txhua MOSFET. Yuav ua li cas los tsim ib lub Circuit Court tsis, thov mus saib daim ntawv qhia daim ntawv qhia "Yuav ua li cas los tsim ib tug buffer circuit".