Inoenderera Conduction Mode muSMPS

Mukugadzira uye kushanda kweSwitched-Mode Power Supplies (SMPS), imwe pfungwa yakakosha iyo inopesvedzera zvakananga kuita, kugadzikana, uye kugona kwesimba rekupa ndiyo conduction mode. Kunzwisisa inoenderera mberi conduction modhi (CCM) maringe nediscontinuous conduction mode (DCM) kwakakosha, sezvo modhi idzi dzine mabatiro akanyanya pakugadzira uye kurongeka kwemaseketi emagetsi, kunyanya kana akabatanidzwa mumaPCB. Heino chikonzero nei CCM ichikosha, mabatiro ainoita magadzirirwo ako, uye matanho anosanganisirwa mukuzadzisa.

Chii chinonzi Continuous Conduction Mode?

Inoenderera mberi conduction modhi (CCM) imamiriro ekuchinja magetsi uko ikozvino mune inductor haimbodonhe kusvika zero panguva yekuchinja. Iyi ndiyo inosarudzika yekushandisa modhi nekuti inopa yakatsetseka kufambisa simba uye inoderedza ruzha uye ripple mune inobuda. Mukupesana, mune discontinuous conduction mode (DCM), iyo inductor yazvino inowira zero pakati pematenderedzwa, izvo zvinogona kuguma nemaitiro akaomarara maererano nemagetsi regulation uye ruzha.

Mune SMPS, maitiro ekuitisa anobata zvese kuunza magetsi uye mhando yezvikamu zvaunosarudza, pamwe neiyo PCB yese marongerwo. Maitiro azvino panguva yekutenderera kwakakosha kune mabatiro aunoita chiratidzo chekuvimbika, kuderedza ruzha, uye kuve nechokwadi chekushandura simba.

Sei Kuenderera Kuitisa Modhi Iine Basa?

Pamusoro pekupa yakagadzikana inobuda magetsi, CCM inopa akati wandei akakosha mabhenefiti anovandudza kuita kwese kwesimba rekushandura masisitimu. Aya mabhenefiti anoita kuti ive sarudzo inokwezva kune akasiyana siyana ekushandisa, kunyanya ayo anoda humbowo, kuvimbika, uye kugona. Kunzwisisa kukosha kweCCM kunobatsira mainjiniya kukwenenzvera madhizaini ekudzora zvirinani, ruzha rwakadzika, uye nekuwedzera kugona, izvo zvakakosha mumasisitimu emazuva ano emagetsi.

Stable Output Voltage:
MuCCM, magetsi ekubuda anonyanya kudzorwa neiyo pulse-width modulation (PWM) duty cycle, inopa kutonga kukuru uye kugadzikana. Izvi zvinoita kuti zvive nyore kubata inobuda voltage kunyangwe iyo yekuisa voltage ichichinja kana kusiyanisa nemamiriro ekutakura. Kuyerera kwazvino kunoenderana kunobatsira kuchengetedza zvinofungidzirwa, zvakavimbika kuburitsa, kuve nechokwadi kugadzikana kwekuita pasi penzvimbo dzakasiyana dzekushanda.

Yakaderedzwa Noise uye EMI:
Kushanda muCCM kunoderedza zvakanyanya ruzha uye electromagnetic interference (EMI) zvichienzaniswa neDiscontinuous Conduction Mode (DCM). Sezvo inductor yazvino isingadonhe kusvika zero muCCM, iyo waveform yazvino inoramba yakatsetseka, ichibvisa shanduko dzakapinza dzakafanana neDCM. Izvi zvinokonzeresa kushoma EMI uye zvinoita kuti sisitimu inyatsokodzera kune zvine hunyoro zvikumbiro uko kuderedza ruzha kwakakosha.

Kubudirira Kwekuita:
CCM inosimudzira kugona kwesimba nekuona kuti inductor inoramba ichiendesa simba pakati pematanho ekupinza uye ekubuda. Kusiyana neDCM, panochengetwa simba robva raburitswa, CCM inoderedza kurasikirwa panguva iyi, zvichitungamira kushanduko yesimba inoshanda. Izvi zvinonyanya kubatsira muzvikumbiro zvinoda kuchengetedzwa kwepamusoro, kuderedza kupera kwesimba uye kupera kwekupisa.

Kudzora Kwakareruka:
MuCCM, kuenderera kwazvino kuyerera kunorerutsa iyo control loop dhizaini. Pasina kukanganisa mune zvazvino, kudzora frequency yekuchinja uye basa kutenderera kunowedzera kutwasuka. Izvi zviri nyore zvinoshandura mune imwe yakagadzikana hurongwa, apo mutemo uri nyore kutarisira, uye magetsi anogona kugadzirisa nekukurumidza kune zvakasiyana-siyana pasina kugadzirisa kwakaoma.

Continuous Conduction Mode vs. Discontinuous Conduction Mode: The Impact paPCB Design

Pakugadzira Switched-Mode Power Supply (SMPS), kunzwisisa kana circuit ichashanda muContinuous Conduction Mode (CCM) kana kuti Discontinuous Conduction Mode (DCM) kwakakosha, sezvo kunokanganisa kwete chete mashandiro asiwo marongerwo ePCB uye kusarudzwa kwezvikamu. Mode yega yega ine matambudziko ayo uye zvinodiwa pakugadzira PCB zvakanaka, kunyanya maererano nekubata simba, kudzora ruzha, uye kutonga ma ripple.

Inoenderera mberi Conduction Mode (CCM)

MuCCM, inductor yazvino haidonhedzi kusvika zero panguva yekuchinja. Ikozvino inoyerera ichienderera, zvichireva kuti simba rekufambisa pakati pekuisa uye kubuda kwezvikamu zvinoramba zviripo. Iyi modhi inosarudzwa mumagadzirirwo ayo chaiwo voltage regulation, yakaderera ripple, uye yakaderera electromagnetic interference (EMI) yakakosha.

Impact paPCB Dhizaini:

• Inoshanda Power Routing: Sezvo ikozvino inoramba ichienderera, PCB inotsvaga inoda kugadzirwa kubata yakakwira ikozvino nekurasikirwa kushoma. Vagadziri vanofanirwa kushandisa zvakapamhidzira kana mhangura yakakora kuti ideredze kuramba uye kuve nechokwadi chekufambisa kwemagetsi, kudzivirira kudonha kwemagetsi kunogona kukanganisa kushanda.
• Yakaderedzwa EMI: Sezvo inductor iripo ichigara yakatsetseka muCCM, iyo waveform inodzivirira shanduko dzakapinza dzinowanzokonzera EMI. Kune yakaderera EMI dhizaini, PCB vagadziri vanogona kutarisisa nzira dzekudzikisa pasi nekudzivirira, vachishandisa ndege dzepasi dzakasimba uye kuiswa kwakakodzera kwechikamu kuti ive nechokwadi chekushanda pasina ruzha.
• Thermal Management: Kuenderera mberi kwezvino kuyerera kunotungamirira kune zvakanyanya kuenderana kupera simba. Kushanda dhizaini yekupisa inova yakakosha, kazhinji inoda masingi ekupisa, mavias ekupisa, uye nepamusoro-yakayerwa zvikamu kuti zvigadzirise kupisa kunobva nekuenderera kushanda.

Discontinuous Conduction Mode (DCM)

MuDCM, iyo inductor ikozvino inowira kune zero panguva yechikamu chekuchinja. Iyi modhi inowanikwa mune yakaderera-simba maapplication kana kana mutoro wakareruka. Nepo DCM ichigona kupa mamwe mabhenefiti maererano nekushanda kwakareruka kune mitoro yakareruka, inounza yakawanda ripple uye EMI nekuda kwekupinza kwazvino shanduko.

Impact paPCB Dhizaini:

• Complex Layout Dhizaini: Kuchinja-chinja kwezvino muDCM kunoda kuchinjika PCB marongerwo. Inductor size, capacitor kuiswa, uye hupamhi hwekutsvagisa hunofanirwa kunyatsosarudzwa kubata nhongonya dzazvino nemipata pasina kukonzera kusagadzikana kana kurasikirwa kwakanyanya.
• Yakawedzera Ripple uye EMI: Sezvo madonhwe azvino kusvika zero, maseketi eDCM anogona kuwana ripple yakakura uye EMI nekuda kwekuchinja kwakangoerekana kwaitika mune zvazvino. Kugadzirisa izvi, emhando yepamusoro decoupling capacitors uye yakasimba PCB grounding yakakosha. Pamusoro pezvo, matekiniki ekudzivirira uye ndege dzepasi-dzinodzivirira dzinofanirwa kuvandudzwa kuti dzideredze ruzha.
• Chikamu Sarudzo: MuDCM, sarudzo yechikamu, kunyanya inductors uye capacitors, inoita basa rakakosha. Mainductors anofanirwa kusarudzwa kubata izvo zvinosiyana zvinodikanwa, nepo ma capacitor achifanirwa kunge akakura zvakakwana kudzvanyirira ripple zvinobudirira. Maturusi ekuenzanisa seSPICE anogona kubatsira kuona zvakakosha zvezvikamu izvi kudzivirira kupinda muCCM kana zvisingatarisirwe.

Sarudzo pakati peCCM neDCM haingopesvedzeri kushanda nekuita kweSMPS yako asiwo nePCB dhizaini yekugadzira. CCM inowanzosarudzirwa zvikumbiro zvinoda kudzorwa nemagetsi chaiwo, ruzha rwakadzika, uye kushanda zvakanaka, nepo DCM ichiwanzo kuwanikwa mune yakaderera-simba, mwenje-mutoro madhizaini anoshivirira yakakwira ripple uye EMI. Kunzwisisa iyo modhi iyo dhizaini yako ichashanda mairi inobvumidza iwe kukwidziridza PCB yako dhizaini, sarudza izvo zvakaringana zvikamu, uye shandisa iyo inonyanya kushanda ruzha uye neanopisa manejimendi ekutonga kuti uwane yakanyanya kunaka kuita.

Kana chinodiwa ichi chichikanganisa kuwanikwa kana kuburitswa kwezvigadzirwa, chienzanise neBGA PCB assembly uye PCB prototype review usati watumira mafaira ekupedzisira kuti aongororwe.

Dhizaini Mafungiro eKuzadzisa Inoenderera Conduction Mode

Kugadzira iyo SMPS inoshanda mukuenderera mberi conduction modhi, unofanirwa kunyatsosarudza zvikamu uye kugadzira marongero. Hezvino zvinhu zvakakosha zvinokanganisa kushanda kweCCM:

• • Inductor Selection: Iyo inductor inoita basa rakakosha pakuona maitiro ekuitisa. Iko inductance value inofanirwa kunge yakakwira zvakakwana kudzivirira ikozvino kubva pakudonha kusvika zero. Kazhinji, inductor yakakura inonyorovesa mitsipa yemazuva ano, iyo inobatsira kuchengetedza kuenderera mberi.
  • Capacitor Selection: Macapacitor mumagetsi emagetsi anoshandiswa kukwenenzvera kushanduka kwemagetsi uye kuchengetedza simba. Iyo yakakura zvakakwana inobuda capacitor inodiwa kudzivirira yakawandisa ripple uye kuona kuti yazvino haidonhe kusvika zero pakati pematenderedzwa. Kukosha kweiyo capacitance yekubuda kunofanirwa kusarudzwa nekuchenjera kuti ienzanise ripple kudzvinyirira uye kuona kuti dhizaini inoramba iri muCCM.
  • Mutoro Kuramba: Kuremerwa kwemutoro kunokanganisa zvakananga maitiro ekushanda. Kana mutoro wacho wakareruka, sisitimu inogona kupinda muDCM. Nekugadzirisa kuramba kwemutoro, unogona kuve nechokwadi chekuti inductor yazvino inoramba iri pamusoro zero mukati mekuchinja kutenderera.
  • PWM Parameters: Iyo yekuchinja frequency uye yebasa kutenderera kwakakosha zvakare kune CCM kushanda. Kugadzirisa kwakaringana kwePWM chiratidzo kunogona kubatsira kuve nechokwadi chekuti inductor iripo inoramba ichienderera. Kusarudza iyo chaiyo yekuchinja frequency uye yebasa kutenderera kwakakosha kuti uwane zvese zvakagadzikana kushanda uye kushanda nesimba.
  • Simulation uye Modelling: Kushandisa maturusi ekuenzanisa seSPICE kunogona kubatsira kuona kuti dhizaini yako ichashanda muCCM. Zvishandiso izvi zvinokutendera kuti uenzanise inductor yazvino, voltage ripple, uye mamwe ma paramita akakosha kuona kuti SMPS inosangana nezvibodzwa zvako zvekuita.

mhedziso

Kuwana inoenderera mberi conduction modhi muSMPS madhizaini kwakakosha pakuvandudza kushanda zvakanaka, zvirinani voltage regulation, uye kuderedzwa ruzha uye EMI. Sarudzo chaiyo yeinductor, capacitor, uye PWM paramita, yakasanganiswa nekuchenjerera PCB dhizaini, ichabatsira kuona kuti system yako inoshanda muCCM, ichipa kuita kwakanyanya kwepamusoro-tech kunyorera.

KuHighleap Electronic, isu tinonyanyogadzira PCB kugadzira uye kugadzira, tichipa nyanzvi mhinduro dzemagetsi ekugadzira magadzirirwo, kusanganisira SMPS ine inoenderera conduction modhi. Mano edu ekugadzira epamusoro anovimbisa kuti magetsi ako epamusoro anoshanda, akavimbika, uye akagadzirira kudiwa zvemagetsi. Rega isu tikubatsire iwe kugadzira uye kuvaka iyo yakakwana magetsi emagetsi kune yako system, nehungwaru uye nemhando yeprojekiti yako inoda.