Nhanganyaya yekuchinja simba adapta yedunhu tekinoroji yeTV

1, Nhanganyaya;

Kuchinja kwemagetsi kune zvakanakira zviri pachena senge kuderera kwesimba rekushandisa, kushanda kwakanyanya uye vhoriyamu diki. Yakave yakashandiswa zvakanyanya muzvigadzirwa zvemagetsi uye zvigadzirwa zvemagetsi. Zvinoenderana neinobuda voltage inodzikamisa kudzora modhi yedunhu, kushandura magetsi kunogona kukamurwa kuita mhando nhatu: pulse wide modulation (PWM), pulse frequency modulation (PFM) uye pulse rate modulation (PWM). Zvinoenderana neiyo trigger modhi, kushandura simba rekupa kunogona kukamurwa kuita yekuzvifadza mhando uye imwe mhando inonakidza, Iyo switching simba adapta inotsanangurwa muchinyorwa ichi ndeye pulse wide modulation (PWM). Iyo inonakidza yekuchinja magetsi, iyo inoburitsa iyo 12V DC yakadzorwa voltage inowanzoshandiswa muzvigadzirwa zvemagetsi nemidziyo yemagetsi, uye inobuda yakayerwa ikozvino i6A. Inokodzera iyo DC yekuisa magetsi emagetsi eLCD TV mukati me32 inches.

2, Tsananguro yehunyanzvi yekutyaira dunhu rekuchinja simba adapta;

Iyo drive chip ob2269 inoshandiswa mukuchinja magetsi inotsanangurwa muchinyorwa chino inotora yakasarudzika dhizaini chirongwa, icho chekuti magetsi emagetsi ane mutengo wakakura uye anogona kuzadzisa zvinodiwa neruzhinji.

Ob2269 inotora dhizaini yazvino maitiro uye ine zvinotevera maitiro;

▲ low standby power kushandiswa: dhizaini yepasi-simba inopindirana yekushanda modhi haigone kungoita kuti hurongwa hwese huve nyore kuona zvinokurudzirwa neInternational Energy Agency pasi pekusatakura.

▲ ruzha rwemahara kushanda: ruzha rwekunzwika haruzoonekwe pasi pemutoro wakareruka uye mutoro wakazara. Iyo yakagadziridzwa sisitimu dhizaini inogona kuita kuti sisitimu ishande chinyararire mune chero mamiriro ekushanda.

▲ kuderera kwekutanga ikozvino: VIN / VDD kutanga ikozvino yakaderera se4ua, iyo inogona kunyatsogadzirisa kurasikirwa kwehurongwa hwekutanga dunhu uye kupfupisa nguva yekutanga yehurongwa.

▲ yakaderera kushanda ikozvino: kushanda ikozvino inenge 2.3ma, iyo inogona kunyatsoderedza kurasikirwa kwegadziriro uye kuvandudza kushanda kwegadziriro.

▲ yakavakwa muOCP muripo: iyo yakavakirwa muOCP muripo wekuita inoita kuti OCP curve yehurongwa iite yakadzikama mumagetsi ese pasina kuwedzera mutengo, kuitira kuvandudza mutengo wekuita kwehurongwa.

▲ inonzwika kuchengetedza basa: ine overvoltage yekudzivirira basa (OVP), pamusoro petembiricha yekudzivirira basa (OTP), undervoltage kuchengetedza basa (UVLO) uye inobuda overload kuchengetedza basa (OLP), yakasanganiswa neinonzwika kuchengetedza basa.

▲ MOSFET dhiraivha yakapfava: inogona kunyatso kuvandudza EMI yehurongwa.

2269 maficha eiyo yakavakirwa-mukati sisitimu: inogona kunyatso kudzikisa EMI uye kuderedza EMI.

3, Magetsi schematic dhayagiramu yekuchinja simba adapta;