ISemicon Original Iisekethe ezidityanisiweyo n123l1 Inkonzo yoluhlu lweBOM kwiStokhwe TPS7A5201QRGRRQ1
Iimpawu zeMveliso
| UHLOBO | INKCAZO |
| Udidi | IiSekethe eziDityanisiweyo (ICs) |
| Mfr | Texas Instruments |
| Uthotho | Iimoto, AEC-Q100 |
| Iphakheji | Iteyiphu & neReel (TR) Sika iTape (CT) Digi-Reel® |
| SPQ | 3000 T&R |
| Ubume beMveliso | Iyasebenza |
| Uqwalaselo Lwemveliso | Okuhle |
| Uhlobo Lwemveliso | Iyahlengahlengiswa |
| Inani labaLawuli | 1 |
| I-Voltage-Input (Ubukhulu) | 6.5V |
| Voltage-Imveliso (Min/Fixed) | 0.8V |
| Voltage-Imveliso (Ubukhulu) | 5.2V |
| Ukuyeka umbane (Ubukhulu) | 0.3V @ 2A |
| Okwangoku -Isiphumo | 2A |
| PSRR | 42dB ~ 25dB (10kHz ~ 500kHz) |
| Iimpawu zokulawula | Vulela |
| Iimpawu zoKhuselo | Ngaphezulu kweqondo lobushushu, iReverse Polarity |
| Ubushushu bokusebenza | -40°C ~ 150°C (TJ) |
| Uhlobo lokuNqamisa | INtaba engaphezulu |
| Ipakethe / Ityala | 20-VFQFN Exposed Pad |
| Supplier Device Package | 20-VQFN (3.5x3.5) |
| Inombolo yeMveliso esisiseko | TPS7A5201 |
Ukuhlelwa
Ii-LDO zihlelwa njengamandla ombane aphumayo e-LDO okanye ii-LDO zemveliso engalunganga.I-voltage ephumayo elungileyo i-LDOs (i-low dropout) abalawuli: sebenzisa i-transistor yamandla (ekwabizwa ngokuba sisixhobo sokudlulisa) njenge-PNP.le transistor ivumela i-saturation ukuze umlawuli abe nombane ophantsi kakhulu wokuyeka, ngokuqhelekileyo malunga ne-200mV;imveliso engalunganga ye-LDO zisebenzisa i-NPN njengesixhobo sayo sotshintshiselwano kwaye isebenza ngendlela efanayo kwimveliso encomekayo yee-LDO.Isiphumo esibi se-LDO sisebenzisa i-NPN njengesixhobo sayo sokudlulisa kwaye sisebenza ngendlela efanayo kwisixhobo se-PNP sesiphumo esihle se-LDO.
Ingcebiso eyongeziweyo: I-voltage ephumayo ngumahluko omncinci phakathi kombane wokufakelwa kunye nombane ophumayo ofunekayo ukuze umlawuli agcine umbane ophumayo ngaphakathi kwe-100mV ngaphezulu okanye ngaphantsi kwexabiso layo legama.
Ukukhetha isisombululo
I-Boost isoloko ilukhetho olulungileyo lwe-DCDC, i-buck, nokuba ukhetha i-DCDC okanye i-LDO, ukuthelekisa ngokwexabiso, ukusebenza kakuhle, ingxolo, kunye nokusebenza.
❶ Xa igalelo kunye neziphumo zombane zisondele, kungcono ukhethe umlawuli we-LDO, onokufikelela ekusebenzeni okuphezulu kakhulu.
Umzekelo: Izilawuli ze-LDO zihlala zisetyenziswa kwizicelo apho i-lithium-ion ibhetri yebhethri iguqulwa ibe yi-3V yombane wokukhupha.Nangona i-10% yokugqibela yamandla ebhetri ingasetyenziswanga, umlawuli we-LDO usaqinisekisa ixesha elide lokusebenza kwebhetri kunye nengxolo ephantsi.
❷Xa i-voltage yegalelo kunye ne-output voltage ingasondeli kakhulu, qwalasela uhlobo lokutshintsha i-DCDC nayo kuba igalelo langoku le-LDO lilingana nemveliso yangoku.Ukuba ukuhla kwamandla ombane kukhulu kakhulu, amandla asetyenziswe kwi-LDO makhulu kakhulu kwaye ukusebenza kakuhle akuphezulu.
Iimpawu zokulawula umgca wemveli
Izilawuli zomgca eziqhelekileyo: ngokubanzi zifuna igalelo lombane we-Uin ubuncinane ubuncinane be-2V ~ 3V ngaphezu kombane ophumayo Malunga (njenge-78XX series of chips), ngaphandle koko abayi kusebenza ngokufanelekileyo.Kodwa imeko enjalo inzima kakhulu.Ukuba i-5V ukuya kwi-3.3V, umehluko we-voltage phakathi kwegalelo kunye nemveliso yi-1.7V kuphela, engahambelani neemeko zokusebenza zomlawuli oqhelekileyo womgca.Ukuhla kwamandla ombane kumlawuli oqhelekileyo welayini usebenzisa i-NPN compound power transistor ijikeleze i-2V.
Nge-MOS yamandla e-transistors kunokwenzeka ukubonelela ngeyona voltage iphantsi yokuyeka.Ngamandla eMOS, ukuhla kwamandla ombane kuphela ngomlawuli kubangelwa ukuchasana kwe-ON komthwalo wangoku wesixhobo sokubonelela umbane.Ukuba umthwalo uncinci, i-voltage drop drop eveliswa ngale ndlela ngamashumi ambalwa e-millivolts.
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