Switching power supply chip classification
Kuj tseem muaj ntau yam kev tswj cov chips rau kev hloov cov khoom siv hluav taws xob, uas feem ntau muab faib ua ob pawg: hom tswj tam sim no thiab hom tswj hluav taws xob. Hom kev tswj hluav taws xob tsuas yog kuaj cov zis voltage, nres kaw-voj tswj raws li lub teeb liab teb, thiab siv PWM thev naus laus zis los kho qhov tso zis hluav taws xob. Los ntawm txoj kev xav ntawm kev tswj txoj kev xav, qhov no yog ib qho kev tswj hwm ib leeg. Hom kev tswj tam sim no yog ua raws li hom kev tswj hluav taws xob, ntxiv qhov kev sib txuas tsis zoo tam sim no, ua rau nws muaj ob txoj hlua tswj, yog li txhim kho kev ua haujlwm ntawm lub zog hluav taws xob.
Ua ntej tshaj plaws, los ntawm kev sib piv sab tswv yim, AC / DC yog qhov nyuaj dua ua dua DC / DC. Vim hais tias AC / DC txuas ncaj qha rau pej xeem network, qee qhov tseem ceeb yog cov hluav taws xob me me ncaj qha, thiab tuaj yeem siab li 350VAC thaum hmo ntuj; Qee qhov txuas nrog cov kab tsis raug, thiab qhov hluav taws xob ncaj qha yog 380VAC, thiab qhov hluav taws xob qis kuj tuaj yeem ncav cuag qis dua 130V. Tsis tas li ntawd, muaj ntau yam khoom siv uas muaj cov yam ntxwv sib txawv hauv kev sib txuas ntawm pej xeem kev sib txuas, muaj cov khoom tsim nyog, lub peev xwm thauj khoom, muaj ntau lub suab nrov nrov ntawm daim phiaj hluav taws xob, thiab rov ua cov khoom sib haum xeeb, thunderstorms thiab lwm yam. Kev sib xyaw ua ke ua rau pej xeem sib koom ua ke ntau dua. Lub input voltage ntawm DC / DC feem ntau yog los ntawm lub rectifier lossis roj teeb. Feem ntau siv voltages yog 12V / 24V / 48V / 60V, thiab lwm yam 4 hom, lub rectifier yog AC / DC, uas tau raug rho tawm ib zaug.
Thib ob, hais txog kev xaiv cov cuab yeej thiab kev ntseeg siab, AC / DC tsim yog qhov nyuaj dua li DC / DC. Nws tuaj yeem pom tias AC / DC ncaj qha ntsib nrog cov hluav taws xob siab. Kev xaiv ntawm cov khoom siv nkag, tshwj xeeb tshaj yog lub zog MOSFETs, qhov siab dua qhov hluav taws xob, qhov ntau dua qhov kev hloov hluav taws xob poob thiab hloov pauv, thiab qhov nyuaj dua nws yog ua kom tau raws li cov qauv thermal ntawm lub hwj huam mov. Lwm cov diodes thiab triodes kuj muaj. Qhov teeb meem ntawm kev kub siab yog qhov nyuaj rau kev xaiv, thiab tsis tshua muaj siab yog yooj yim xaiv. Nyob rau tib lub sijhawm, qib kev nyab xeeb ntawm AC / DC fais fab mov yuav tsum siab dua li ntawm DC / DC. Los ntawm qhov kev xav ntawm cov qauv Circuit Court, AC / DC feem ntau xav tau ob-theem hloov dua siab tshiab, thaum DC / DC tsuas yog xav tau ib-theem hloov dua siab tshiab, thiab lub ntsiab hluav taws xob hloov hluav taws xob siv los ntawm DC / DC yog qhov yooj yim.
