LP87524BRNFRQ1 VQFN-HR26 Cheebtsam Tshiab Thawj Kev Ntsuas Kev Sib Txuas Hluav Taws Xob Chip IC LP87524BRNFRQ1

1.

Kev ua haujlwm ntawm lub converter

Lub converter yog ib lub cuab yeej uas hloov lub teeb liab mus rau lwm lub teeb liab.Lub teeb liab yog ib daim ntawv los yog cov ntaub ntawv uas muaj, thiab nyob rau hauv tsis siv neeg instrumentation cov cuab yeej thiab tsis siv neeg tswj systems, ib tug teeb liab feem ntau hloov mus rau hauv lwm lub teeb liab uas yog muab piv nrog ib tug qauv los yog siv kom muaj nuj nqis los txuas ob hom instrumentation ua ke, yog li lub converter feem ntau yog qhov sib txuas nruab nrab ntawm ob lub twj paj nruag (los yog cov khoom siv).

2.

Yuav ua li cas buck converters ua haujlwm

Lub tshuab hluav taws xob hloov hluav taws xob yog lub tshuab hluav taws xob hloov hluav taws xob, chav kawm ntawm cov khoom siv uas muaj qhov hloov pauv (feem ntau yog MOSFET) kom ceev lub voj voog rau thiab tawm, qhov kev hloov ceev no ua rau lub voj voog square, yog tias lub luag haujlwm ntawm lub voj voog hloov mus. 50%, piv txwv li qhov hloov pauv ntawm 50% ntawm lub sijhawm, qhov nruab nrab voltage yuav yog 50% ntawm cov tswv yim.

Lub square yoj yuav tsum tau smoothed los muab lub zog muaj txiaj ntsig thiab feem ntau inductors thiab capacitors tau siv nyob rau hauv series kom ua tiav txoj haujlwm no.Qhov kev sib xyaw ua ke no yog hu ua LC low-pass lim, qhov twg cov yam ntxwv ntawm inductor smooth tawm tam sim no thiab lub capacitor tiv thaiv kev hloov pauv tam sim ntawm qhov hluav taws xob.Qhov sib xyaw ua ke ua rau muaj qhov sib npaug ntawm qhov hluav taws xob zoo nrog lub ripple tsawg.Piv txwv li, yog tias qhov hluav taws xob input yog 10V thiab qhov hloov pauv siv lub voj voog 50% lub luag haujlwm, cov zis hluav taws xob yuav yog 5V.

Lwm qhov tsim nyog ntawm lub tshuab hloov pauv yog lub diode lossis lwm yam kev hloov pauv txuas nrog rau qhov sib npaug nrog lub inductor.Qhov no yog txhawm rau them nyiaj rau kev ua haujlwm ntawm inductor, qhov twg tam sim no hauv inductor tsis tuaj yeem hloov pauv sai sai, tiv thaiv cov hlab hloov los ntawm kev puas tsuaj los ntawm overload.

Tus phaw converter kuj muaj cov khoom siv hluav taws xob ntxiv kom ntseeg tau tias qhov tso zis hluav taws xob ruaj khov.Lub converter siv lub kaw-voj tswj lub tswv yim nrog kev tawm tswv yim tsis zoo los saib xyuas cov zis hluav taws xob thiab hloov kho lub luag haujlwm lub voj voog ntawm cov keyboards los tswj cov zis voltage.

3.

Tsim kev txiav txim siab rau phaw converters

Buck converters muaj txiaj ntsig zoo, nrog qee cov khoom siv tau ua tiav ntau dua 95%.

puck converters yog tus nqi ntau dua li cov kab hluav taws xob regulators nyob rau theem siab zog, qhov twg cov nqi cua txias ntawm cov kab hluav taws xob hluav taws xob yuav tsawg dua tus nqi ntawm kev siv cov phaw converter.

qhov tso zis ntawm puck converter muaj suab nrov, uas txhais tau hais tias cov zis ntawm ib tug linear regulator yog ruaj khov thiab zoo dua haum rau cov ntawv thov uas yuav tsum tau muaj suab nrov tsawg.

linear regulators tuaj yeem teb sai sai rau kev tawm tswv yim thiab kev hloov pauv piv rau puck converters.