Txhim Kho Nyem Teeb Meem Teeb Meem ntawm Apple 27 "Zaub: 4 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26

Puas muaj ib qho ntawm koj cov zaub uas koj nyiam pib ua suab nrov ntau thaum koj siv nws? Qhov no zoo li tshwm sim tom qab cov zaub tau siv rau ntau xyoo. Kuv debugged ib qho ntawm cov zaub xav tias muaj kab laum kaw hauv lub kiv cua txias, tab sis nws tig tawm lub hauv paus ntawm qhov ua tsis tiav yog qhov nyuaj dua.

Kauj Ruam 1: Lub Hwj Huam Tsim Tus Txheej Txheem

Nov yog cov lus qhia yuav ua li cas txhawm rau txheeb xyuas thiab kho qhov nyem qhov teeb meem suab nrov tau ntsib ntawm qee tus qauv ntawm Apple Thunderbolt zaub thiab IMac khoos phis tawj.

Cov tsos mob feem ntau yog suab nrov tsis txaus ntseeg los ntawm cov zaub uas suab zoo li tsoo nplooj. Lub suab nrov feem ntau tuaj tom qab cov zaub tau siv rau ib pliag. Qhov teeb meem zoo li yuav ploj mus tom qab lub tshuab tsis txuas rau ob peb teev tab sis yuav rov qab los hauv feeb tom qab siv lub cuab yeej. Qhov teeb meem tsis ploj mus yog tias lub tshuab tau muab tso rau hauv lub xeev txwv tsis pub rub tawm.

Lub hauv paus ntawm qhov teeb meem tshwm sim los ntawm pawg thawj coj saib xyuas hluav taws xob zoo li kuv yuav sim taug kev txawm tias cov txheej txheem txheeb xyuas qhov teeb meem. Nrog kev paub txaus, nws yog qhov teeb meem uas tuaj yeem kho tau rau ob peb duas las tus nqi ntawm cov khoom.

CEEB TOOM !!! HIGH VOLTAGE !!! CEEB TOOM !!! Ua phem !

Ua haujlwm ntawm chav fais fab tuag yog qhov txaus ntshai. Ua kom muaj hluav taws xob muaj nyob ntawm lub rooj tsavxwm txawm tias tom qab lub cuab yeej tsis tau ntsaws. Tsuas yog sim kho qhov no yog tias koj tau kawm paub tuav lub zog hluav taws xob ntau. Kev siv lub tshuab hluav taws xob cais tawm yog YUAV TSUM tiv thaiv kom luv hauv av. Lub zog khaws hluav taws xob siv sijhawm ntev txog tsib feeb los tso tawm. Ua qhov ntsuas ntawm tus neeg ua haujlwm ua ntej ua haujlwm ntawm lub voj voog

CEEB TOOM !!! HIGH VOLTAGE !

Kev tsim qauv ntawm feem ntau ntawm Apple cov zaub lub zog hloov pauv yog ob theem hloov pauv lub zog. Thawj theem yog tus tswj hwm ua ntej uas hloov pauv AC lub zog rau hauv qhov hluav taws xob DC siab. AC input voltage tuaj yeem nyob txhua qhov chaw ntawm 100V txog 240V AC. Qhov tso tawm ntawm tus tswj hwm ua ntej no feem ntau nyob txhua qhov chaw ntawm 360V txog 400V DC. Theem thib ob hloov pauv qhov siab DC mus rau cov khoom siv hluav taws xob digital rau lub khoos phis tawj thiab tso tawm, feem ntau ntawm 5 ~ 20V. Rau Thunderbolt zaub, muaj peb qhov tso tawm: 24.5V rau lub laptop them nyiaj. 16.5-18.5V rau LED teeb pom kev zoo thiab 12V rau cov laj thawj digital.

Tus tswj hwm ua ntej yog siv feem ntau rau kev hloov kho lub zog. Txog rau qhov tsim hluav taws xob qis kawg, tus choj txuas yooj yim tau siv los hloov cov tswv yim AC rau DC. Qhov no ua rau muaj qhov siab tshaj tam sim no thiab lub zog tsis zoo. Lub zog hloov kho qhov teeb meem hloov kho qhov no los ntawm kev kos duab sinusoidal tam sim no nthwv dej. Feem ntau, lub tuam txhab fais fab yuav tso ib qho kev txwv qis zog ntawm cov khoom siv uas tau tso cai kos los ntawm kab hluav taws xob. Qhov tsis zoo ntawm lub zog ua rau poob ntxiv ntawm lub tuam txhab fais fab khoom siv li no yog tus nqi rau lub tuam txhab fais fab.

Tus tswj hwm ua ntej no yog lub hauv paus ntawm lub suab nrov. Yog tias koj disassemble cov zaub kom txog thaum koj tuaj yeem rho tawm lub rooj tsav xwm hluav taws xob, koj yuav pom muaj ob lub zog hloov pauv. Ib qho ntawm kev hloov pauv yog rau tus tswj hwm ua ntej thaum lwm tus hloov pauv yog qhov hloov pauv mus rau qhov siab.

Kauj ruam 2: Teeb meem Txheej txheem cej luam

Kev tsim qauv ntawm kev hloov kho lub zog hluav taws xob yog lub hauv paus ntawm tus tswj uas tsim los ntawm ON Semiconductor. Tus lej naj npawb yog NCP1605. Tus qauv tsim yog lub hauv paus txhawb hom DC-DC lub zog hloov pauv. Cov tswv yim hluav taws xob yog hloov kho sine yoj hloov pauv qhov DC voltage du. Cov zis rau qhov tshwj xeeb tsim hluav taws xob tsim tau txiav txim siab yog 400V. Cov khoom siv hluav taws xob ntau ntim muaj peb ntawm 65uF 450V capacitors khiav ntawm 400V.

CEEB TOOM: DISCHARGE Cov CAPACITORS PRIOR los ua haujlwm ntawm lub CIRCUIT

Qhov teeb meem kuv pom yog tam sim no raug kos los ntawm kev txhawb nqa hloov pauv tsis yog sinusoidal lawm. Rau qee qhov laj thawj, tus hloov pauv raug kaw ntawm lub sijhawm sib txawv. Qhov no ua rau qhov tsis sib xws tam sim no raug rub los ntawm lub qhov (socket). Lub sijhawm uas qhov kev kaw haujlwm tshwm sim yog qhov tsis xwm yeem, thiab qis dua 20kHz. Nov yog lub hauv paus ntawm lub suab nrov uas koj hnov. Yog tias koj muaj AC sojntsuam tam sim no, txuas qhov kev sojntsuam mus rau lub cuab yeej thiab koj yuav tsum tuaj yeem pom qhov kos tam sim no los ntawm lub cuab yeej tsis du. Thaum qhov no tshwm sim, chav tso duab kos cov duab tam sim no nrog cov khoom sib xyaw loj. Kuv paub tseeb tias lub tuam txhab fais fab tsis txaus siab rau hom khoom siv hluav taws xob no. Lub zog hloov kho qhov ntsuas hluav taws xob, tsis yog nyob ntawm no txhawm rau txhim kho lub zog zoo, yog qhov ua rau muaj qhov dej ntws tsis zoo nyob qhov twg tam sim no tab tom raug rub hauv qhov nqaim nqaim. Zuag qhia tag nrho, cov lus hais tsis txaus ntseeg thiab lub suab nrov lub zog nws pov rau hauv kab hluav taws xob yuav ua rau txhua tus kws tsim hluav taws xob tawg. Qhov kev ntxhov siab ntxiv nws tso rau ntawm cov khoom siv hluav taws xob tej zaum yuav ua rau cov zaub tsis ua tiav yav tom ntej.

Sib sau ua ke txawm tias cov ntawv teev npe rau NCP1605, nws zoo li muaj ntau txoj hauv kev uas cov nti tawm tau tuaj yeem xiam. Ntsuas qhov yoj ib puag ncig cov kab ke, nws dhau los ua ib qho ntawm kev tiv thaiv Circuit Court yog ncaws tawm.

Kauj Ruam 3: Txheeb Xyuas Qhov Cuam Tshuam Yam Uas Ua Rau Qhov Teeb Meem

Txhawm rau txheeb xyuas lub hauv paus tseeb ntawm qhov teeb meem, peb yuav tsum ntsuas qhov ntsuas hluav taws xob.

Thawj qhov ntsuas yog qhov hluav taws xob ntawm lub zog cia lub zog hluav taws xob. Qhov ntsuas hluav taws xob no yuav tsum nyob ib puag ncig 400V +/- 5V. Yog tias qhov hluav taws xob no siab dhau lossis qis, FB qhov faib hluav taws xob tau tawm ntawm qhov tshwj xeeb.

Qhov ntsuas thib ob yog FB (Pub rov qab) tus pin qhov hluav taws xob (Pin 4) nrog kev hwm rau (-) ntawm lub capacitor. Qhov hluav taws xob yuav tsum yog ntawm 2.5V

Qhov ntsuas thib peb yog OVP (Tshaj tiv thaiv hluav taws xob) tus pin qhov hluav taws xob (Pin 14) nrog rau qhov (-) ntawm lub capacitor. Qhov hluav taws xob yuav tsum yog ntawm 2.25V

CEEB TOOM, txhua qhov ntsuas ntsuas muaj qhov hluav taws xob siab. Kev rho tawm hluav taws xob yuav tsum tau siv rau kev tiv thaiv

Yog tias qhov hluav taws xob ntawm tus pin OVP nyob ntawm 2.5V, lub suab nrov yuav tsim tawm.

Vim li cas qhov no tshwm sim?

Lub zog tsim hluav taws xob muaj peb qhov faib hluav taws xob. Thawj qhov faib ua piv txwv cov tswv yim AC voltage, uas yog ntawm 120V RMS. Qhov kev faib tawm no tsis zoo li yuav poob vim qhov qis tshaj qhov siab thiab nws muaj 4 tus tiv thaiv. Ob qhov txuas ntxiv tom ntej piv rau qhov tso tawm qhov hluav taws xob (400V), txhua qhov ntawm cov faib faib muaj 3x 3.3M ohm resistors hauv koob, tsim 9.9MOhm resistor uas hloov qhov hluav taws xob los ntawm 400V mus rau 2.5V rau tus pin FB, thiab 2.25V rau OV pin.

Sab qis ntawm tus faib rau FB tus pin muaj qhov ua tau zoo 62K ohm resistor thiab 56K ohm resistor rau OVP tus pin. FP qhov sib faib hluav taws xob nyob ntawm lwm sab ntawm lub rooj tsavxwm, tej zaum ib nrab tau them los ntawm qee cov kua nplaum silicone rau lub capacitor. Hmoov tsis zoo, kuv tsis muaj cov duab ntxaws ntxaws ntawm FB resistors.

Qhov teeb meem tshwm sim thaum 9.9M Ohm resistor pib ntws. Yog tias OVP kev mus los hauv kev ua haujlwm ib txwm muaj, cov txiaj ntsig ntawm kev hloov pauv yuav tig tawm, ua rau muaj kev cuam tshuam tam sim ntawm kev nkag tam sim no.

Lwm qhov muaj peev xwm yog FB tus tiv thaiv pib txav mus, qhov no tuaj yeem ua rau cov hluav taws xob pib pib nkag siab dua 400V, txog rau OVP kev mus los lossis puas tsuaj rau qhov hloov pauv thib ob DC-DC.

Tam sim no los kho.

Qhov kev txhim kho cuam tshuam nrog kev hloov pauv ntawm qhov tsis xws luag. Nws yog qhov zoo tshaj los hloov cov resistors rau ob qho OVP thiab FP qhov faib hluav taws xob. Cov no yog 3x 3.3M resistors. Tus tiv thaiv koj siv yuav tsum yog 1% nto mount resistor loj 1206.

Nco ntsoov tias koj ntxuav cov dej ntws tawm los ntawm cov laug raws li qhov siv hluav taws xob, cov dej ntws tuaj yeem ua tus coj thiab txo qhov ua tau zoo.

Kauj Ruam 4: Vim Li Cas Qhov No Ua Tsis Tau?

Yog vim li cas qhov kev siv hluav taws xob ua tsis tiav tom qab qee lub sijhawm yog vim qhov hluav taws xob siab siv rau cov resistors no.

Lub zog hloov pauv yog nyob rau txhua lub sijhawm, txawm tias cov zaub/khoos phis tawj tsis tau siv. Yog li, raws li txoj kev nws tau tsim, yuav muaj 400V thov rau 3 series resistors. Kev suav suav qhia 133V siv rau txhua tus tiv thaiv. Qhov ua haujlwm siab tshaj plaws qhia los ntawm Yaego 1206 chip resistor cov ntaub ntawv yog 200V Yog li, cov qauv tsim hluav taws xob nyob ze rau qhov siab tshaj plaws ua haujlwm voltage cov resistors no yog txhais tau tias yuav ua haujlwm. Kev nyuab siab ntawm cov khoom ntawm tus tiv thaiv yuav tsum yog qhov zoo. Qhov kev nyuab siab los ntawm qhov chaw muaj hluav taws xob siab tuaj yeem ua rau nrawm cov khoom puas los ntawm kev txhawb nqa kev txav mus los. Nov yog kuv tus kheej qhov kev sib cav. Tsuas yog kev tshuaj xyuas ntxaws ntxaws ntawm qhov ua tsis tau los ntawm cov kws tshawb fawb cov ntaub ntawv yuav nkag siab zoo vim li cas nws thiaj ua tsis tiav. Hauv kuv lub tswv yim, siv 4 series resistors hloov 3 yuav txo qhov kev ntxhov siab ntawm txhua tus tiv thaiv thiab txuas lub neej ntawm lub cuab yeej.

Vam tias koj nyiam qhov kev qhia no yuav kho Apple Thunderbolt zaub li cas. Thov txuas lub neej ntawm cov cuab yeej uas koj muaj tam sim no tsawg dua ntawm lawv mus rau qhov chaw pov tseg.