Qhov tseeb qhov voltage / zoo ib yam uas twb muaj lawm monolithic txais yuav monolithicfais fab adapter, geared nrog lub zog qis dual ua haujlwm amplifier thiab kho qhov tseeb zoo tib yam regulator los txhim kho voltage tswj loophole nrog rau cov kev tswj uas twb muaj lawm.Piv nrog rau kev tswj lub voj voog ua los ntawm cov transistors, nws muaj qhov zoo ntawm qhov raug siab ntawm qhov sib xws ntawm qhov voltage thiab zoo ib yam uas twb muaj lawm, ncaj nraim peripheral Circuit Court, me me tsis kam muaj nuj nqis ntawm kev kuaj pom tam sim no, txo kev siv hluav taws xob nrog rau kev txhim kho lub zog hluav taws xob.Nws lub zog ua tau zoo tuaj yeem ncav cuag 80%.Hom fais fab mov no haum rauceev roj teeb chargers ntawm laptopszoo li video clip recorders.
Lub Circuit Court ntawm 15v2a precision qhov tsis tu ncua voltage / tsis tu ncua tam sim no tso zis fais fab adapter yog qhia hauv daim duab.Plaub integrated circuits yog siv nyob rau hauv lub Circuit Court: TOP214Y monolithic fais fab adapter (IC1), PC816A linear optocoupler (IC2), adjustable precision parallel regulator tl431C (C3), thiab low-power dual ua hauj lwm amplifier lm358 (iC4, nrog rau ob lub lag luam amplifiers thiab ic4. ib 4b).
Circuit Court muaj cov yam ntxwv hauv qab no:
- ① Lub voj voog tswj hluav taws xob yog tsim los ntawm ic4b, IC3, vd5, thiab sampling resistors R3 thiab R4;Lub voj tswj tam sim no yog tsim los ntawm ic4a, vd6, thiab overcurrent detection resistor R6.
- ② Lub voj voog tswj hluav taws xob thiab lub voj voog tswj tam sim no ua haujlwm raws li lub hauv paus ntsiab lus ntawm "logic lossis rooj vag", uas yog, txhua lub sijhawm, lub voj uas nws cov zis yog qib siab ua lub luag haujlwm tswj.
- ③ Qhov thib ob bias winding NSB tau ntxiv los muab lub zog rau lub voj voog tswj.Qhov kev tsis ncaj ncees thib ob tuaj yeem ua raws li qhov hloov pauv ntawm DC input voltage koj kom nws tseem muaj cov yam ntxwv tam sim no thaum lub zog tso zis voltage U txo qis heev.Nws yuav nkag mus rau lub xeev tsis siv neeg rov pib dua tsuas yog thaum u ≤ 0.8V.
- ④ Ib qho TOP214y ib leeg-chip fais fab adapter yog siv, thiab cov ntsuas tso zis hluav taws xob nce mus txog 30W
- ⑤ Thaum lub voj tswj tam sim no tsim los ntawm kev ua haujlwm amplifier tau txais yuav, qhov kev ua haujlwm ntawm kev tshawb pom tam sim no R6 tuaj yeem txo mus rau 0.1q, lub zog noj yuav raug txo mus rau 0.4W, thiab lub zog ua haujlwm tuaj yeem txhim kho.
- ⑥ Ua kom tus nqi siab tshaj ntawm kev tawm tswv yim voltage u rau 46v.Ntawm no, PC816A optocoupler raug xaiv, uas nws U (BR) CEO = 70V> 40V.
Raws li cov xwm txheej raug, lub nplhaib tswj hluav taws xob ua haujlwm, nrog rau lub hwj chim adapter ua haujlwm nyob rau hauv qhov chaw txuas mus ntxiv.Nws nkag mus rau thaj chaw uas twb muaj lawm thaum kuv nyob ze 2a.Tam sim no, lub nplhaib tswj uas twb muaj lawm ua haujlwm.Nyob rau hauv-theem input davhlau ya nyob twg ntawm ic4a tau txais nyob rau hauv kev sib cuag nrog cov uas twb muaj lawm nrhiav pom teeb liab ur6, raws li zoo raws li lub inverted input davhlau ya nyob twg txuas nrog voltage divider voltage ufy.Lub zog faib vaj huam sib luag yog tsim los ntawm R8, tl431c, thiab r5.Ic4a tso tawm qhov yuam kev tom qab sib piv ub6 nrog ufy.Lub teeb liab U tom qab ntawd dhau los ua lub teeb liab tam sim no ntawm vd5 nrog rau R1, txav mus rau hauv LED hauv optocoupler, thiab tom qab ntawd tswj hwm lub luag haujlwm ntawm TOP214Y kom tswj tau cov zis tam sim no io ntawm cov khoom siv hluav taws xob tas li hauv qhov chaw tam sim no.Undoubtedly, vd5, as well as vd6, yog sib npaug rau "los yog rooj vag".Yog hais tias tam sim no tswj voj outputs ib tug high degree raws li zoo raws li lub voltage tswj voj tshwm sim theem qis, lub hwj chim mov ua hauj lwm nyob rau hauv tas li tam sim no tso zis lub xeev;Ntawm qhov tsis sib xws, nws ua haujlwm nyob rau hauv qhov ntsuas qhov tshwm sim tsis tu ncua.
Cov khoom lag luam ntsig txog
Post lub sij hawm: May-20-2022