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Chii chinangwa chemapepa mazhinji pane chipMagetsiPino?
Sezvo maine majinjini yemagetsi zvinozivikanwa kuti capacitors kazhinji anoshandira mana ekutanga mabasa: Deupling, coupling DC panguva yekubvumira AC kuti ipfuure), kusefa, uye kuchengetedza simba. Nhasi, ini ndichatarisa pakutsanangura kukosha kwekukoka.
Mhando dzakajairika dzekushongedza capacitors
Mufananidzo uri pamusoro unoratidza chidimbu che schematic yeiyo stm32 Series microcontroller's shoma simba rekupa simba. Iyi mcu inoda zvishanu 3.3V Simba renji, iyo inowanzo kupihwa neLDO (Yakadzika Dropout Regatoror), senge lm11111117.
Nei kusarudza capacitors inodiwa
Nepo mlsos kazhinji inopa yakawanda yakagadzikana voltages zvichienzaniswa neDc-dc Converters. Kugadzirisa izvi, isu tinoisa kurongedza capacitors padhuze neChip's Simba Supply PIN. Aya ma capacitor akakwira-frequency-frequency af kubva pane simba rekupa, achitsausa kune ivhu, nokudaro anoverengera chip anogamuchira iyo chips yakagadziriswa uye yakavimbika DC voltage. Zvekuita zvakaringana, decoupling capacitors inofanira kuiswa padyo nepangoita kune pini yaChip.
Nei 0,1μf capacitor inowanzo kushandiswa?
Kana vachidzidzira kuperera mumagetsi, isu tinowanzoongorora capacitor senzira iyi, kumafuro akaderera, iyo capacitor zvakanyanya inoshanda sefafa. Nekudaro, sezvo kuwanda kwekuwedzera, iyo inonakidza chikamu che cacacitor inova yakakosha uye pakupedzisira inotonga. Kupfuura chaiko chikumbaridzo frequency, iyo capacitit yekutsiga inoshanda inotsauka. Izvi zvinoreva kutiHigh Frequency, capacitor haisisiri kuzvibata se "yakachena" capacitor. Iyo chaiyo yekucheka maitiro e capacitor inoratidzirwa mu curve pazasi:
Kubva ku curve, iyo yakanakira kucheka kunoitika pane yakaderera nzvimbo yekusakwanacurve (kushoma kwekutadza). Nekudaro, sekuwanda kwekuwedzera, iyo 0,1μf capacitor inotora isinganyatsoenderana ne1.01μf capacitor. Panoto-pfuura marefu, zvidiki zvekuwedzera maitiro (semuenzaniso, 0.001μF) inodikanwa kuti ive isina kuchena.
Solution: Parallel Capacitors
Kuti ugadzirise ichi chigumwe, mazhinji matunhu ematunhu anoshandisa akawanda capacitors mukufananidza pamwe neakasiyana casacitance tsika. Nekubatanidza capacitors tsika dzakasiyana siyana, iyo inobudirira freetery frequency yekuwedzera yakawedzerwa, ichiratidza kuti kukurumidza kudzvinyirira kwemheremhere kune yakakura spectrum. Iyi nzira inobvumira kuvandudzwa kwekushandisa kuita pamusoro pehuremu hwakawanda hwemahara.
Shenzhen Anke PCB Co, LTD
Kutumira Nguva: Mar-07-2025
