200Watts 12V rau 220V DC-DC Converter: 13 Kauj Ruam (nrog Duab)

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

Nyob zoo txhua tus:)

Txais tos rau cov lus qhia no uas kuv yuav qhia koj li cas kuv tau ua qhov no 12volts rau 220volts DC-DC hloov pauv nrog cov lus tawm tswv yim kom ruaj khov tso tawm qhov hluav taws xob thiab cov roj teeb qis/ qis-tiv thaiv kev tiv thaiv, tsis siv lub microcontroller. Txawm hais tias qhov tso tawm hluav taws xob siab DC (thiab tsis yog AC) peb tuaj yeem khiav LED Teeb, Lub Xov Tooj Chargers thiab lwm yam khoom siv SMPS los ntawm chav tsev no. Tus hloov pauv no tsis tuaj yeem ua ib qho kev hloov pauv lossis hloov pauv raws li lub zog AC lossis lub kiv cua.

Rau qhov haujlwm no kuv yuav siv lub npe nrov SG3525 PWM tswj IC kom nce qib DC qhov hluav taws xob thiab muab cov lus qhia tsim nyog los tswj cov zis hluav taws xob. Txoj haujlwm no siv cov khoom yooj yim heev thiab qee qhov tau khaws los ntawm cov khoom siv hluav taws xob qub hauv computer. Cia ua lub tsev!

Khoom siv

1. EI-33 ferrite transformer nrog bobbin (koj tuaj yeem yuav qhov no los ntawm koj lub khw hluav taws xob hauv ib cheeb tsam lossis khaws nws los ntawm lub khoos phis tawj PSU)
2. IRF3205 MOSFETs - 2
3. 7809 tus tswj hluav taws xob -1
4. SG3525 PWM xws li IC
5. OP07/ IC741/ lossis lwm yam Kev Ua Haujlwm Amplifier IC
6. Capacitor: 0.1uF (104)- 3
7. Capacitor: 0.001uF (102)- 1
8. Capacitor: 3.3uF 400V non-polar ceramic capacitor
9. Capacitor: 3.3uF 400V polar electrolytic capacitor (koj tuaj yeem siv tus nqi siab dua ntawm lub peev xwm)
10. Capacitor: 47uF electrolytic
11. Capacitor: 470uF electrolytic
12. Resistor: 10K resistors-7
13. Resistor: 470K
14. Resistor: 560K
15. Kev tiv thaiv: 22 Ohms - 2
16. Kuj tsis paub meej Resistor/ Preset: 10K -2, 50K - 1
17. UF4007 diodes rov qab sai - 4
18. 16 tus pin IC qhov (socket)
19. 8 tus pin IC
20. Ntsia hlau txuas: 2
21. Heatsink rau mount MOSFET thiab tus tswj hluav taws xob (los ntawm lub khoos phis tawj qub PSU)
22. Perfboard lossis Veroboard
23. Txuas xov hlau
24. Cov khoom siv Soldering

Kauj Ruam 1: Sib sau Cov Cheeb Tsam Xav Tau

Feem ntau ntawm cov khoom xav tau los ua txoj haujlwm no tau raug coj los ntawm lub khoos phis tawj siv hluav taws xob tsis ua haujlwm. Koj yuav yooj yim pom cov hloov pauv thiab hloov pauv sai diodes los ntawm cov khoom siv hluav taws xob nrog rau cov ntsuas hluav taws xob siab thiab cov cua sov rau MOSFETS

Kauj Ruam 2: Ua Tus Transformer Raws Li Peb Qhov Tshwj Xeeb

Qhov tseem ceeb tshaj plaws ntawm kev tau txais qhov hluav taws xob tso tawm kom raug yog los ntawm kev ua kom raug qhov hloov pauv hloov pauv ntawm qhov sib piv ntawm thawj thiab theem ob thiab tseem kom ntseeg tau tias cov xov hlau tuaj yeem nqa tus nqi xav tau tam sim no. Kuv tau siv EI-33 core nrog rau cov ntxaiv rau lub hom phiaj no. Nws yog tib qho kev hloov pauv uas koj tau txais hauv SMPS. Koj kuj tseem yuav pom EE-35 core ib yam.

Tam sim no peb lub hom phiaj yog txhawm rau txhawb qhov ntsuas hluav taws xob ntawm 12 volts mus txog 250- 300 volts thiab rau qhov no kuv tau siv 3+3 tig hauv thawj nrog rau nruab nrab tapping thiab li 75 lem nyob rau sab thib ob. Txij li thawj sab ntawm lub tshuab hloov pauv yuav ua haujlwm ntau dua tam sim no ob sab, Kuv tau siv 4 cov hlua tooj liab uas muaj hlua txuas ua ke los ua ib pab pawg thiab tom qab ntawd ua rau nws nyob ib ncig ntawm lub ntxaiv. Nws yog 24 AWG xaim uas kuv tau txais los ntawm cov khw muag khoom kho vajtse hauv ib cheeb tsam. Qhov laj thawj rau kev noj 4 txoj kab ua ke los ua ib txoj xov hlau yog txhawm rau txo qhov cuam tshuam ntawm cov dej ntws ntws thiab ua kom muaj cov cab hluav taws xob zoo dua qub. thawj winding muaj 3 tig txhua nrog rau nruab nrab tapping.

Qhov thib ob winding muaj li ntawm 75 tig ntawm 23 AWG insulated tooj liab hlau.

Ob qho tseem ceeb thiab theem ob winding yog insulated nrog txhua lwm yam siv insulating daim kab xev qhov txhab nyob ib ncig ntawm bobbin.

Yog xav paub ntau npaum li cas kuv tau ua tus hloov pauv, thov mus saib cov vis dis aus thaum kawg ntawm cov lus qhia no.

Kauj Ruam 3: The Oscillator Theem

SG3525 yog siv los tsim lub moos hloov pauv uas tau siv los hloov tsav MOSFETS uas thawb thiab rub tam sim no los ntawm thawj cov coils ntawm tus hloov pauv thiab tseem muab kev tawm tswv yim tswj kom ruaj khov tso zis. Kev hloov pauv zaus tuaj yeem teeb tsa los ntawm kev siv lub sijhawm tiv thaiv thiab cov khoom siv hluav taws xob. Rau peb daim ntawv thov peb yuav muaj qhov hloov pauv zaus ntawm 50Khz uas tau teeb tsa los ntawm lub peev xwm ntawm 1nF ntawm tus pin 5 thiab 10K resistor nrog rau qhov sib txawv resistor ntawm tus pin 6. Qhov sib txawv resistor pab txhawm rau kho qhov zaus.

Kom tau txais cov ncauj lus kom ntxaws txog kev ua haujlwm ntawm SG3525 IC, ntawm no yog qhov txuas rau daim ntawv teev npe ntawm IC:

www.st.com/resource/en/datasheet/sg2525.pd…

Kauj Ruam 4: The Switching Stage

50Khz mem tes tso tawm los ntawm tus tswj PWM yog siv los tsav MOSFETs. Kuv tau ntxiv qhov me me 22 ohm tam sim no txwv kev tiv thaiv rau lub qhov rooj davhlau ya nyob twg ntawm MOSFET nrog rau 10K rub qis tus tiv thaiv kom tso lub qhov rooj capacitor. peb tseem tuaj yeem teeb tsa SG3525 txhawm rau ntxiv lub sijhawm tuag me me ntawm kev hloov pauv ntawm MOSFET kom ntseeg tau tias lawv yeej tsis ON tib lub sijhawm. Qhov no ua tiav los ntawm kev ntxiv 33 ohm resistor ntawm tus pin 5 thiab 7 ntawm IC. Qhov nruab nrab tapping ntawm lub tshuab hloov pauv tau txuas nrog cov khoom siv tau zoo thaum lwm ob qhov kawg tau hloov pauv siv MOSFETs uas txuas rau txoj hauv kev ib ntus.

Kauj Ruam 5: Lub Sijhawm Tso Tawm thiab Tawm Tswv Yim

Cov zis ntawm tus hloov pauv yog qhov hluav taws xob siab pulsed DC teeb liab uas yuav tsum tau kho thiab ua kom zoo dua qub. Qhov no yog ua tiav los ntawm kev siv tus choj txhim kho tag nrho siv kev rov ua haujlwm nrawm diodes UF4007. Tom qab ntawd lub txhab nyiaj hluav taws xob ntawm 3.3uF txhua qhov (lub ncov qaum thiab tsis muaj lub hau ntswj) muab DC tso tawm ruaj khov tsis muaj ib qho ripples. Ib tus yuav tsum ua kom ntseeg tau tias qhov ntsuas hluav taws xob nyeem ntawm lub kaus mom siab txaus kom zam thiab khaws cov khoom tsim tawm.

Rau kev ua raws cov lus tawm tswv yim Kuv tau siv siv lub zog faib hluav taws xob sib faib network ntawm 560KiloOhms thiab 50K qhov sib txawv ntawm qhov hloov pauv, cov zis ntawm lub zog tawm mus rau cov tswv yim ntawm qhov ua yuam kev amplifier ntawm SG3525 thiab yog li los ntawm kev kho lub potentiometer peb tuaj yeem tau txais peb qhov xav tau qhov hluav taws xob tso tawm.

Kauj Ruam 6: Ua Raws Li Kev Tiv Thaiv Kev Tiv Thaiv

Kev tiv thaiv undervoltage yog ua tiav siv Kev Ua Haujlwm Lub Hwj Chim hauv cov qauv sib piv uas sib piv cov khoom siv hluav taws xob mus rau qhov siv ruaj khov tsim los ntawm SG3525 Vref tus pin. Qhov pib yog kho tau siv 10K potentiometer. Sai li qhov hluav taws xob poob qis dua tus nqi teeb tsa, Qhov kaw ntawm PWM tus tswj tau qhib thiab lub zog hluav taws xob tsis tau tsim.

Kauj Ruam 7: Daim duab Circuit Court

Nov yog daim duab qhia tag nrho ntawm txoj haujlwm nrog txhua lub ntsiab lus uas tau hais los yav dhau los tau tham.

Okay, txaus ntawm qhov theoretical ib feem, tam sim no cia peb tau txais peb txhais tes qias neeg!

Kauj Ruam 8: Kuaj Lub Circuit Court ntawm Breadboard

Ua ntej yuav siv tag nrho cov khoom siv ntawm veroboard, nws yog qhov tseem ceeb kom ntseeg tau tias peb lub Circuit Court ua haujlwm thiab cov lus tawm tswv yim ua haujlwm kom raug.

CEEB TOOM: ceev faj tuav lub zog siab lossis tuaj yeem ua rau koj poob siab. Nco ntsoov khaws kev nyab xeeb hauv siab thiab xyuas kom koj tsis txhob kov ib qho twg thaum lub zog tseem nyob. Cov electrolytic capacitors tuaj yeem tuav tus nqi rau qee lub sijhawm yog li ua kom ntseeg tau tias nws tau tso tawm tag.

Tom qab ua tiav qhov kev soj ntsuam qhov tso tawm qhov hluav taws xob, Kuv tau siv qhov qis qis txiav tawm thiab nws ua haujlwm tau zoo.

Kauj Ruam 9: Txiav txim Siab Qhov Kev Tso Npe ntawm Cheebtsam

Tam sim no ua ntej peb pib pib txheej txheem txheej txheem, nws yog ib qho tseem ceeb uas peb txhim kho txoj haujlwm ntawm cov khoom sib xws hauv txoj hauv kev uas peb yuav tsum siv cov xov hlau tsawg thiab cov khoom siv cuam tshuam tau muab tso ze ua ke xws li lawv tuaj yeem txuas tau yooj yim txuas nrog foob cov kab.

Kauj Ruam 10: Txuas Ntxiv Cov Txheej Txheem Soldering

Hauv cov kauj ruam no koj tuaj yeem pom kuv tau tso tag nrho cov khoom siv rau daim ntawv thov hloov chaw. Kuv tau ua kom ntseeg tau tias cov kab rau MOSFETs yog tuab kom thiaj li nqa tau dej ntau dua. Tsis tas li, sim khaws cov lim dej kom ze rau IC li sai tau.

Kauj Ruam 11: Soldering Transformer thiab Feedback System

Nws yog lub sijhawm tam sim no txhawm rau txhim kho tus hloov pauv thiab txhim kho cov khoom siv rau kev hloov kho thiab tawm tswv yim. Nws yog qhov tseem ceeb uas yuav tsum tau hais tias thaum siv tshuaj xyuas yuav tsum tau ua kom pom qhov siab thiab qhov hluav taws xob qis muaj qhov sib cais zoo thiab txhua qhov luv yuav tsum zam. Sab siab thiab qis qhov hluav taws xob yuav tsum sib koom ua ke txhawm rau txhawm rau tawm tswv yim ua haujlwm kom raug.

Kauj Ruam 12: Ua Kom tiav Cov Qauv

Tom qab kwv yees li 2 teev ntawm kev siv tshuaj txhuam thiab ua kom ntseeg tau tias kuv lub xov tooj hluav taws xob tau txuas nrog kom raug yam tsis muaj luv, tus qauv tau ua tiav thaum kawg!

Tom qab ntawd kuv hloov kho qhov zaus, qhov hluav taws xob tso tawm thiab qhov txiav tawm hluav taws xob qis siv peb lub zog ntsuas.

Lub Circuit Court ua haujlwm raws li qhov xav tau thiab muab qhov hluav taws xob ruaj khov heev.

Kuv tau ua tiav kev tswj hwm kuv lub xov tooj thiab lub laptop them nyiaj nrog qhov no vim lawv yog SMPS cov cuab yeej siv. Koj tuaj yeem yooj yim khiav me me mus rau nruab nrab teeb LED thiab them nrog lub tsev no. Qhov ua tau zoo kuj tseem siv tau, ib puag ncig ntawm 80 txog 85 feem pua. Qhov tshwj xeeb tshaj plaws yog tias tsis muaj thauj khoom noj tam sim no tsuas yog li 80-90 milliAmps tag nrho ua tsaug rau kev tawm tswv yim thiab kev tswj hwm!

Kuv vam tias koj nyiam qhov kev qhia no. Nco ntsoov qhia qhov no nrog koj cov phooj ywg thiab tshaj tawm koj cov lus tawm tswv yim thiab ua xyem xyav hauv nqe lus hauv qab no.

Thov saib cov vis dis aus rau tag nrho cov txheej txheem tsim thiab ua haujlwm ntawm tus qauv. Xav txog kev sau npe yog tias koj nyiam cov ntsiab lus:)

Kuv yuav pom koj nyob rau tom ntej no!