Cov txheej txheem:
- Kauj Ruam 1: YUAV TSUM MUAJ NTAUB NTAWV
- Kauj Ruam 2: CIRCUIT THIAB Ua Haujlwm
- Kauj Ruam 3: Kev tsim khoom ntawm PCB
Video: USB TO 12-V CONVERTER (Ntu-1): 3 Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27
Nyob zoo peeps! Kuv rov qab los dua nrog cov lus qhia nthuav.
Txoj haujlwm no muab 12V tso tawm los ntawm txhua lub zog USB, zoo li lub PC USB chaw nres nkoj, USB adapter lossis lub txhab nyiaj fais fab. LM2577ADJ txhawb kev hloov IC yog lub hauv paus ntawm txoj haujlwm. IC tuaj yeem tswj tau txog li 800mA, nws raug nquahu kom siv tsuas yog 200mA thauj khoom ntawm qhov tso tawm kom nyob nyab xeeb. LM2577 yog cov kab hluav taws xob sib xyaw ua ke uas muab tag nrho lub zog thiab tswj kev ua haujlwm rau kev nce qib (txhawb nqa), ya rov qab, thiab rau pem hauv ntej hloov pauv hloov cov tswj hwm.
Kauj Ruam 1: YUAV TSUM MUAJ NTAUB NTAWV
- USB CONNECTOR
- 4 PIN HEADER
- 200uF/ 16 V SMD 1210
- 470uF/16V
- 0.1uF SMD 0805
- 330 nF SMD 08056
- MUR240 ZOS
- 100 uH 12MM*12MM SMD
- 2.2 K 0805 SMD
- 18 KWB 0805
- 2 KWB 0805
- LM2577 IB
Kauj Ruam 2: CIRCUIT THIAB Ua Haujlwm
Cov cuab yeej muaj nyob hauv peb qhov sib txawv tso tawm hluav taws xob hloov pauv: 12V, 15V, thiab kho tau. Yuav tsum muaj tus lej tsawg kawg ntawm cov khoom siv sab nraud, cov tswj hwm no muaj txiaj ntsig zoo, thiab siv tau yooj yim. Cov npe hauv cov ntaub ntawv no yog tsev neeg ntawm tus qauv inductors thiab flyback transformers tsim los ua haujlwm nrog cov kev hloov pauv no. Nrog rau hauv cov nti yog 3.0A NPN hloov pauv thiab nws cov kev tiv thaiv kev tiv thaiv hluav taws xob, suav nrog kev txwv tam sim no thiab cua sov, thiab qis dua qhov hluav taws xob. Lwm cov yam ntxwv suav nrog 52 kHz tsau zaus oscillator uas yuav tsum tsis muaj cov khoom siv sab nraud, hom pib muag kom txo qis-maj tam sim no thaum pib, thiab hom kev tswj tam sim no txhawm rau txhim kho kev tsis lees paub ntawm qhov hluav taws xob nkag thiab tso tawm cov khoom thauj mus los.
Default cov zis tau teeb tsa rau 12V cov zis, txawm li cas los xij, Cov Hluav Taws Xob Tawm tau kho tau siv R2 thiab R3. Xa mus rau cov ntaub ntawv ntawm LM2577ADJ rau cov ntaub ntawv ntau ntxiv. Output Voltage Formula VOut = 1.23V (1+R2/R3) (Nyeem Cov Ntawv Qhia rau cov ntaub ntawv ntau ntxiv txog Inductor tus nqi, Capacitor, Cov lus tawm tswv yim, tawm tam sim no, thiab qhov hluav taws xob)
Kauj Ruam 3: Kev tsim khoom ntawm PCB
Kuv tau tsim kuv cov qauv siv EAGLE CAD cov cuab yeej. Gerber tau txuas ntawm no. Kuv tau muab cov ntaub ntawv Gerber tso rau LionCircuits.
Lawv muab cov PCBs zoo ntawm tus nqi pheej yig thiab lawv cov nqi tsim qauv Tus nqi qis yog qhov kev pabcuam zoo tshaj plaws rau tsev kawm qib siab thiab DIY cov haujlwm.
Ntu 2 ntawm cov lus qhia no yuav tso tawm sai sai no.
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