Munyika yanhasi, uko michina yemagetsi iripo kwese kwese, dhizaini nekushandiswa kwemamodule emagetsi kwave chinhu chikuru muinjiniya yemagetsi. Module yeLow Dropout (LDO) linear regulator power module inonyanya kukosheswa nekuda kwehunhu hwayo hwepamusoro hwemutsara uye kugadzikana. Kuti ikwanise kuwedzera kwezvinodiwa zvemagetsi emazuva ano, kugadzirisa dhizaini yePCB yemamodule emagetsi eLDO kuti ishande zvakanaka uye kugadzikana ibasa rakakosha kune mainjiniya.
Kunzwisisa LDO
LDO regulators vanoita basa rakakosha mukugadzira magetsi ekugadzira nekuchengetedza diki voltage musiyano pakati pekuisa uye kubuda, iyo inosimudzira linear voltage regulation performance. Iyo inodonhedza voltage ndiyo musiyano udiki pakati peiyo yekupinza uye yekubuda voltage uko regulator inogona kuramba ichichengetedza yakadzorwa kubuda. Iyi voltage dropout inogona kusiyana nekuchinja mumutoro.
Hunhu hweLDO Linear Regulated Power Supply
LDO linear regulators dzakakurumbira nekuda kwekuita kwavo kwakanakisa, kuvimbika kwakanyanya, nyore kuungana uye kugadzirisa, uye mutengo wakaderera. Nekudaro, ivo zvakare vane zvipingamupinyi zvakaita sekushandiswa kwemagetsi kwakanyanya uye kugadzirwa kwakakosha kwekupisa, kazhinji kuwana hunyanzvi hwekungoita 45%. Iyo yakajairika LDO magetsi emagetsi ane inoraira transistor, yekuenzanisa amplifier, chikamu chemhinduro sampling, uye referensi voltage chikamu.
Kusarudza iyo Yakarurama LDO
Kune mhando mbiri dzakajairika dzeLDOs: uP-MOSFET LDOs uye PNP LDOs. Iyo UP-MOSFET LDO inofarirwa kune yayo nyore dhiraivha zvinodiwa uye yakaderera Rds kukosha asi inogumira nemutengo wayo wepamusoro. Kune rimwe divi, iyo PNP LDO, kunyangwe ichida yakakwira yekudonhedza voltage, inogona kubata yakakwira yekupinza voltages.
Pakusarudza LDO, vagadziri vePCB vanofanirwa kufunga nezvezvinodiwa zvekushandisa uye zvimhingamipinyi zvebhajeti. Kunzwisisa kutengeserana pakati pemhando dzakasiyana dzeLDO kwakakosha kuti uwane inodiwa simba rekuita uye kuita.
Nheyo dzekutanga dzeLDO muPCB Dhizaini
1. Maitiro ekugadzira LDO
Kuti ive nechokwadi chekushanda kwakakwana, LDO inofanira kuiswa pedyo nemutoro (chip) sezvinobvira kuderedza madonhwe emagetsi nekuda kwemitsara yakareba yakaderera-voltage. Mamiriro acho anofanirwa kuve nechokwadi chekuti kupinza uye kubuda kwesefa yemagetsi zvakapatsanurwa zvakakwana kudzivirira kubatana kweruzha. Zvikamu zvinofanirwa kurongeka zvakabatana kuti zvideredze huwandu uye hurefu hwekutungamira uye zvinongedzo.
2. LDO Wiring Strategy
Kuti udzivise kubatanidza mhinduro, waya dzekupinza uye dzekubuda hadzifanirwe kumhanya dzakafanana uye dzakatarisana kune imwe neimwe. Waya dzepasi pakati pekupinza uye zvinobuda dzinofanirwa kukobvurwa kuderedza kushomeka uye kudonha kwemagetsi.
Mumatunhu akakwirira-frequency, dzivisa makona ekurudyi uye acute angles mu wiring; pachinzvimbo, shandisa arcs kana obtuse angles kuvandudza kushanda kwemagetsi. Nzvimbo dzepamusoro-soro, dzakadai sewaya dzepasi uye magetsi ekuisa / kubuda waya, dzinofanira kunge dzakakora sezvinobvira kuti dzideredze kuramba uye kudzivirira parasitic coupling-induced self-excitation.
Zvichipa kukosha kwekupisa kwekupisa kweLDOs, wedzera nzvimbo yekupisa kupisa nekuwedzera nzvimbo yemhangura yepasi uye kushandisa nzira dzakawanda kuti uve nechokwadi chekubata kwazvino.
Kugadzira inoshanda uye yakagadzikana LDO simba module inoda kunzwisisa kwakadzama kwemaitiro ayo ekushanda, maitiro ekusarudza, uye marongero uye wiring mazano. Nekunyatsofunga nezvezvinhu izvi, mainjiniya anogona kukwidziridza mashandiro emidziyo yemazuva ano yemagetsi, kuwana zvese zviri zviviri kunyatsoshanda uye kushomeka kwesimba.
