UC2843BD1013TR ic chip ihuriweho numuzunguruko wa elegitoroniki semiconductor igishya kandi cyumwimerere ikibanza kigura

1.LDO, cyangwa igenzura rito, ni umurongo muto ugabanya umurongo ukoresha tristoriste cyangwa umuyoboro wogukora (FET) ukorera mukarere kayo kugirango ukuremo ingufu zirenze urugero ziva mumashanyarazi yinjizwa kugirango zitange ingufu ziva mumashanyarazi.
Ibintu bine byingenzi ni Ibitonyanga, Urusaku, Igipimo cyo Kwanga Amashanyarazi (PSRR), na Quiescent Yubu Iq.
Ibice byingenzi: gutangira umuzenguruko, guhora utanga isoko kubogama, gushoboza uruziga, guhindura ibintu, inkomoko yamakuru, kongera amakosa, imiyoboro irwanya ibitekerezo hamwe no kurinda umutekano, nibindi.

2．Ihame
Inzira y'ibanze ya LDO igizwe na seriveri igenzura VT, icyitegererezo cyo kurwanya R1 na R2, no kugereranya amplifier A.
Sisitemu ikoreshwa, niba ifasha pin iri murwego rwohejuru, umuzenguruko utangira, amasoko ahoraho yumuzunguruko utanga kubogama kumuzunguruko wose, inkomoko yumurongo wa voltage yashizweho vuba, kandi voltage yinjiza idakoreshwa ikoreshwa nka voltage. yumuriro w'amashanyarazi, voltage yerekana ikoreshwa nka fonctionnement ya fonctionnement ya voltage yamakosa amplifier, rezo ya rezo ya rezo igabanya ingufu zavuyemo kandi ikabona voltage yo gusubiza, iyi voltage itanga ibitekerezo byinjira muburyo bumwe bwo kugereranya ikosa, n'ibibi Ibi bitekerezo bya voltage ni kwinjiza kuruhande rwa isotropic yo kugereranya amakosa kandi ugereranije na voltage mbi.Itandukaniro riri hagati ya voltage zombi ryongerewe imbaraga namakosa yongerera imbaraga kugirango agenzure neza irembo ryibintu bigenzura ingufu, kandi ibisohoka bya LDO bigenzurwa no guhindura imiterere yimiyoboro ya tube ihindura, ni ukuvuga Vout = (R1 + R2) / R2 × Vref
Umugenzuzi nyawo wo guta umurongo ugaragara kandi afite indi mirimo nko kurinda imizigo migufi irinda imizunguruko, guhagarika amashanyarazi, guhagarika ubushyuhe, kurinda imiyoboro ihuza, nibindi.

3.Ibyiza, ibibi, nuburyo bugezweho
Umuyoboro muke wa Dropout (LDO) umurongo ugenzura ni igiciro gito, urusaku ruke, umutimanama muke, ibice bike byo hanze, mubisanzwe ubushobozi bumwe gusa cyangwa bubiri, kandi bifite urusaku ruke cyane hamwe nigipimo kinini cyo kwanga amashanyarazi (PSRR).LDO ni Sisitemu ntoya kuri Chip (SoC) hamwe no kwikenura cyane.Irashobora gukoreshwa mugucunga imiyoboro nyamukuru kandi igahuza ibyuma byumuzunguruko nka MOSFETs hamwe numurongo muke cyane kumurongo-wo-kurwanya, diode ya Schottky, sisitemu yo kurwanya, hamwe na voltage igabanya, kimwe no kurinda birenze urugero, kurinda ubushyuhe burenze, Inkomoko yerekana neza, inyongeramusaruro zitandukanye, gutinda, nibindi. PG ni igisekuru gishya cya LDO hamwe no kwipimisha kuri buri gihugu gisohoka kandi cyatinze gutanga amashanyarazi meza, gishobora nanone kwitwa Power Nziza, ni ukuvuga "imbaraga nziza cyangwa imbaraga zihamye" .LDOs nyinshi zisaba capacitor imwe gusa mubyinjira nimwe mubisohoka kugirango bikore neza.
LDO nshya irashobora kugera kubisobanuro bikurikira: gusohora urusaku rwa 30µV, PSRR ya 60dB, umutuzo wa 6µA, hamwe na voltage ya 100mV gusa.Impamvu nyamukuru yiyi mikorere inoze ya LDO umurongo ugenzura ni uko umugenzuzi wakoreshejwe ari P-umuyoboro wa MOSFET, utwarwa na voltage kandi ntusaba ko uhari, ugabanya umuyaga ukoreshwa nigikoresho ubwacyo hamwe na voltage igabanuka hejuru yacyo.ibitonyanga bingana hafi nibicuruzwa bisohoka hamwe na on-resistance.Umuvuduko wa voltage hejuru ya MOSFET ni muto cyane kubera ubukana bwayo buke.Abagenzuzi basanzwe bakoresha imirongo ya PNP.Mumuzunguruko hamwe na tristoriste ya PNP, kugabanuka kwa voltage hagati yinjiza nibisohoka ntibigomba kuba bike cyane kugirango wirinde transistor ya PNP kujya kwiyuzuza no kugabanya ubushobozi bwo gusohora.