nkhani

Muzinthu zamagetsi, nthawi zambiri timawona chiwerengero cha DC / DC, LDO, pali kusiyana kotani pakati pawo, pakupanga zinthu zamagetsi momwe tingasankhire komanso momwe tingapangire kuti tipewe zolakwika za mapangidwe a dera?

DC/DC ndikusintha ma voliyumu anthawi zonse apano kukhala voteji yina yosalekeza, mitundu yodziwika bwino ndi Boost (Boost), Buck (Buck), mmwamba ndi pansi voteji ndi mawonekedwe a reverse gawo. Onse awiri amakhazikitsa voteji yolowera ku voteji inayake, ndipo LDO ikhoza kugwiritsidwa ntchito ngati njira yotsika pansi.

1. Kutulutsa kwamagetsi.DC/DC kutulutsa magetsi kungasinthidwe ndi kukana kwa mayankho, LDO ili ndi mitundu iwiri ya kutulutsa kokhazikika ndi kutulutsa kosinthika;

2, kulowetsa ndi kutulutsa mphamvu kusiyana.Kusiyanitsa kwa magetsi pakati pa kulowetsa ndi kutulutsa ndi gawo lofunikira la LDO.Zotulutsa za LDO ndizofanana ndi zomwe zalowa.Kusiyana kwapang'onopang'ono kocheperako, kumachepetsa kugwiritsa ntchito mphamvu komanso kumapangitsa kuti chip chikhale chokwanira.

3. Kutulutsa kwakukulu kwaposachedwa.LDO nthawi zambiri imakhala ndi Kutulutsa kokwanira kwa mazana angapo mA, pomwe DCDC ili ndi Kutulutsa kokwanira kwa A angapo kapena kupitilira apo.

4. Magetsi olowetsa.Matchipu osiyana ali ndi zofunikira zosiyana.

5. Ripple / phokoso.Kuthamanga / phokoso la DC / DC lomwe likugwira ntchito mu kusintha kwasintha ndi loipa kuposa la LDO, kotero dera lomwe limakhala lovuta kwambiri pa nthawi yokonzekera liyenera kuyesa kusankha magetsi a LDO.

6. Kuchita bwino.Ngati magetsi olowera ndi otuluka ali pafupi, mphamvu yachibale yosankha LDO ndipamwamba kuposa DC / DC;ngati kusiyana kwamphamvu kuli kwakukulu, kuthekera kosankha DC / DC ndikokwera.Popeza kutulutsa kwa LDO kumakhala kofanana ndi kulowetsedwa kwapano, kutsika kwamagetsi ndikokulirapo ndipo mphamvu zomwe zimagwiritsidwa ntchito pa LDO ndizazikulu kwambiri, kugwiritsa ntchito bwino sikokwera.

7. Mtengo ndi zozungulira dera. Mtengo wa LDO ndi wotsika kuposa wa DCDC, ndipo dera lozungulira ndilosavuta.