Itsva Yekutanga LM25118Q1MH/NOPB Yakabatanidzwa Circuit IC REG CTRLR BUCK 20TSSOP Ic Chip LM25118Q1MH/NOPB

1. Synchronous bucking

Zvakanakira.

Kubudirira kwepamusoro: kupikisa kwemukati kwe mos tube iduku zvikuru uye kudonha kwe-voltage ye-on-state kuduku kudarika kuderera kweCosmos voltage yeSchottky diode.

Zvakaipa.

Kusakwana kugadzikana: inoda kugadzira dhiraivha yedhiraivha, uye kudzivirira iyo yepamusoro uye yakaderera chubhu panguva imwe chete, dunhu rinonyanya kuomarara, zvichikonzera kusakwana kugadzikana.

2. non-synchronous buck

Zvakanakira.

Kuderera kwakaderera: Schottky diode voltage kudonha yakakura, maererano nekushandiswa kwesimba kunogadzirwa ne mos chubhu

Zvakaipa.

Kugadzikana kwepamusoro: hapazovi nekuita panguva imwechete yepamusoro uye pasi pechubhu.

1: PFM (pulse frequency modulation method)

Kuchinja pulse hupamhi ndeyechokwadi, nekushandura frequency yekubuda kwepulse, iyo inobuda voltage inodzikamiswa.yemhando yekudzora ine mukana wekushomeka kwesimba kushandiswa kunyange kana yakashandiswa kwenguva yakareba, kunyanya pamitoro midiki.

2: PWM (Pulse Width Modulation)

Iyo PWM yekudzora mhando inoshanda zvakanyanya uye ine yakanaka kubuda voltage ripple uye ruzha.

Kupfupisa: Kazhinji, mutsauko wekuita pakati peDC-DC inoshandura ine nzira mbiri dzakasiyana dzemodulation, PFM nePWM, ndedzinotevera.

PWM frequency, PFM duty cycle yekusarudza nzira.PWM/PFM shanduko yerudzi PFM kudzora pamitoro midiki uye otomatiki chinja kuPWM kutonga pamitoro inorema.

3.

Ndeupi musiyano uripo pakati pe synchronous boost ICs uye asynchronous boost ICs?

Musiyano mukuru pakati pe synchronous boost ICs uye asynchronous boosts ndiwo mutsauko wekugadzirisa nzira.

Iyo synchronous inosimudzira IC wedunhu inoshandisa MOS nekuti MOS machubhu ane yakadzika yakadzika yemukati kuramba munzvimbo yakavhurika uye kurasikirwa mukugadzirisa maitiro kwakadzikira zvakanyanya, saka kushanda kwe synchronous boost kwakakwira uye chizvarwa chekupisa chakaderera.Inogona kushandiswa kune yakakwirira-simba boost application.

Asynchronous boost IC maseketi anoshandisa diode kugadzirisa.Diodes ane junction voltage inodonha mukugadzirisa maitiro.Iyo yakakwirira ikozvino mukugadzirisa kwekugadzirisa, inowedzera kurasikirwa.Kazhinji, simba harigoni kuva simba guru.