lebenkele le le leng bakeng sa likarolo tsa elektroniki TLV1117LV33DCYR SOT223 controller chip ic integrated circuit
Sehlopha se nepahetseng le seamplifier sa liphoso se fana ka ho nepahala ha 1.5%.Karolelano e phahameng haholo ea phepelo ea phepelo ea matla (PSRR) e nolofalletsa tšebeliso ea sesebelisoa bakeng sa postegulation ka mor'a hore ho be le taolo ea switching.Likarolo tse ling tsa bohlokoa li kenyelletsa lerata la tlhahiso e tlase le low-dropou tvoltage.
Sesebelisoa se lefshoa ka hare hore se tsitse ka 0-Ω equivalent series resistance (ESR) capacitors.Melemo ena ea bohlokoa e nolofalletsa tšebeliso ea li-capacitor tsa ceramic tse theko e tlaase, tse nyenyane.Li-capacitor tse bolokang litšenyehelo tse nang le li-voltages tse phahameng tsa leeme le mocheso oa mocheso le tsona li ka sebelisoa ha li lakatsoaLetoto la TLV1117LV le fumaneha ka har'a sephutheloana sa SOT-223.
Litšobotsi tsa Sehlahisoa
MOFUTA | TLHALOSO |
Sehlopha | Lipotoloho tse Kopantsoeng (ICs) PMIC - Voltage Regulators - Linear |
Mfr | Lisebelisoa tsa Texas |
Letoto | - |
Sephutheloana | Theipi le Reel (TR) Seha Tape (CT) Digi-Reel® |
SPQ |
|
Boemo ba Sehlahiswa | E sebetsa |
Tlhophiso ea Sephetho | E ntle |
Mofuta oa Sephetho | E tsitsitse |
Palo ea Batsamaisi | 1 |
Voltage - Kenyo (Boholo) | 5.5V |
Voltage - Output (Min/Fixed) | 3.3V |
Voltage - Output (Boholo) | - |
Ho theoha ha Voltage (Boholo) | 1.3V @ 800mA |
Hajoale - Sephetho | 1A |
Hajoale - Quescent (Iq) | 100µA |
PSRR | 75dB (120Hz) |
Laola Likarolo | - |
Likarolo tsa Tšireletso | Hajoale, Ho Feta Mocheso |
Mocheso oa ho sebetsa | -40°C ~ 125°C |
Mofuta oa ho Beha | Thaba e kaholimo |
Sephutheloana / Taba | HO YA-261-4, HO YA-261AA |
Sephutheloana sa Sesebelisoa sa Bafani | SOT-223-4 |
Nomoro ea Sehlahisoa sa Motheo | TLV1117 |
Molaoli oa LDO?
LDO, kapa molaoli o tlase oa ho tlohela sekolo, ke molaoli ea tlase oa ho tlohela sekolo.Sena se amana le molaoli oa linear oa setso.Batsamaisi ba linear ba setso, joalo ka letoto la li-chips tsa 78XX, ba hloka hore motlakase oa motlakase o be bonyane 2V ~ 3V e phahameng ho feta matla a phallo, ho seng joalo, ba ke ke ba sebetsa hantle.Empa maemong a mang, boemo bo joalo bo thata haholo, joalo ka 5V ho 3.3V, phapang ea motlakase pakeng tsa ho kenya letsoho le tlhahiso ke 1.7v feela, e sa finyelle maemo a ho sebetsa a balaoli ba linear ba setso.Ho arabela boemo bona, baetsi ba li-chip ba thehile li-chips tsa phetoho ea motlakase oa mofuta oa LDO.
LDO ke molaoli oa linear o sebelisang transistor kapa field-effect tube (FET) e sebetsang sebakeng sa eona sa saturation ho hlahisa motlakase o laoloang ka ho ntša motlakase o feteletseng ho motlakase o kenang oa kopo.Voltage dropout voltage ke phapang e nyane lipakeng tsa motlakase o kenang le motlakase o hlahisoang o hlokahalang bakeng sa molaoli ho boloka motlakase o tsoang ka har'a 100mV ka holimo kapa ka tlase ho boleng ba eona bo ikhethileng.Balaoli ba Positive output voltage LDO (low dropout) hangata ba sebelisa transistor ea motlakase (eo hape e tsejoang e le sesebelisoa sa phetisetso) joalo ka PNP.transistor ena e lumelloa ho tlala e le hore molaoli a ka ba le motlakase o fokolang haholo, ka tloaelo ho pota 200mV;ka ho bapisa, balaoli ba tloaelehileng ba linear ba sebelisang li-transistors tsa matla a NPN tse kopantsoeng ba na le ho theoha ho pota 2V.Tlhahiso e mpe ea LDO e sebelisa NPN e le sesebelisoa sa eona sa ho fana ka thepa mme e sebetsa ka mokhoa o ts'oanang le sesebelisoa sa PNP sa tlhahiso e ntle ea LDO.
Lintlafatso tse ncha li sebelisa li-transistor tsa motlakase tsa MOS, tse khonang ho fana ka motlakase o tlase haholo.Ka MOS ea matla, ho theoha ha motlakase feela ka molaoli ho bakoa ke khanyetso ea ON ea moroalo oa motlakase oa sesebelisoa sa motlakase.Haeba mojaro o le o monyenyane, ho theoha ha motlakase ho hlahisoang ka tsela ena ke mashome a seng makae feela a millivolts.
DC-DC e bolela DC ho ea ho DC (ho fetola litekanyetso tse fapaneng tsa phepelo ea DC) mme sesebelisoa sefe kapa sefe se fihlelang tlhaloso ena se ka bitsoa converter ea DC-DC, ho kenyeletsoa le LDO, empa poleloana e akaretsang ke ho bitsa lisebelisoa moo DC ho DC e fihlellehang ka ho chencha. .
LDO e emetse low dropout voltage, e hlalosoang serapeng se le seng: Theko e tlase, lerata le tlase, le lets'oao le khutsitseng la "low dropout" (LDO) linear regulator ke melemo ea eona e ikhethang.E boetse e hloka likarolo tse 'maloa tsa kantle, hangata e le "bypass capacitor" e le' ngoe kapa tse peli.Litaolo tse ncha tsa linear tsa LDO li ka fihlela lintlha tse latelang: lerata la tlhahiso ea 30μV, PSRR ea 60dB, le 6μA e khutsitseng (TI's TPS78001 e fihlela Iq=0.5uA), le ho theoha ha voltage ea 100mV feela (li-LDO tse hlahisitsoeng ka bongata ka TI 0.1mV).Lebaka le ka sehloohong leo ka lona li-linear regulators tsa LDO li ka fihlelang boemo bona ba ts'ebetso ke hore tube ea regulator ho tsona ke MOSFET ea P-channel, ha balaoli ba tloaelehileng ba melapo ba sebelisa li-transistors tsa PNP.P-channel MOSFET e tsamaisoa ke motlakase 'me ha e hloke hona joale, kahoo e fokotsa haholo hona joale e sebelisoang ke sesebelisoa ka boeona;ka lehlakoreng le leng, lipotolohong tse nang le li-transistors tsa PNP, li thibela PNP Ka lehlakoreng le leng, lipotolohong tse nang le li-transistors tsa PNP, ho theoha ha motlakase pakeng tsa ho kenya letsoho le ho tsoa ha hoa lokela ho ba tlase haholo ho thibela PNP transistor hore e se ke ea tlala le ho fokotsa bokhoni ba tlhahiso;ho theoha ha motlakase ho pholletsa le P-channel MOSFET ho batla ho lekana le sehlahisoa sa tlhahiso ea hona joale le ea ho hanyetsa.Kaha ho hanyetsa ha MOSFET ho nyane haholo, ho theoha ha motlakase ho eona ho tlase haholo.
Haeba li-voltage tsa ho kenya le ho tsoa li le haufi haholo, ho molemo ho sebelisa molaoli oa LDO, o ka finyellang katleho e phahameng haholo.Ka hona, balaoli ba LDO ba sebelisoa haholo lits'ebetsong moo motlakase oa betri ea lithium-ion o fetoloang ho 3V output voltage.Leha matla a betri a sa sebelisoe liperesente tse leshome tsa ho qetela, molaoli oa LDO o ntse a ka netefatsa nako e telele ea ts'ebetso ea betri ka lerata le tlase.
Haeba li-voltage tsa ho kenya le ho tsoa ha li haufi haholo, ho lokela ho nahanoa ka DCDC e fetohang hobane, joalo ka ha ho ka bonoa ho tsoa ho molao-motheo o kaholimo, motlakase oa LDO o lekana le phallo ea hona joale, 'me haeba ho theoha ha motlakase ho le leholo haholo, matla a sebelisoang LDO a maholo haholo ebile ha a sebetse hantle.
Li-converter tsa DC-DC li kenyelletsa li-circuits tsa ho nyoloha, ho theoha, ho ea holimo / tlase, le li-circuits tse inverting.melemo ea li-converter tsa DC-DC ke ts'ebetso e phahameng, le bokhoni ba ho hlahisa maqhubu a phahameng le maqhubu a tlaase a khutsitseng.Ka kopanyo e ntseng e eketseha, li-converter tse ngata tse ncha tsa DC-DC li hloka li-inductors tse 'maloa tsa kantle le li-filter capacitor.Leha ho le joalo, molumo oa ho phunya le ho fetola molumo oa li-controller tsena li phahame 'me litšenyehelo li batla li le holimo.
Lilemong tsa morao tjena, ka nts'etsopele ea theknoloji ea semiconductor, li-inductors tse holimo-limo, li-capacitor, le li-chips tsa taolo ea phepelo ea motlakase tse kopantsoeng haholo li fetohile tse nyane le tse nyane ka theko.Mohlala, bakeng sa motlakase o kenang oa 3V, tlhahiso ea 5V/2A e ka fumanoa ho sebelisoa on-chip NFET.Taba ea bobeli, bakeng sa lits'ebetso tse nyane ho isa ho tse mahareng, liphutheloana tse theko e tlase, tse nyane li ka sebelisoa.Ho phaella moo, haeba maqhubu a ho fetoha a eketseha ho 1MHz, ho ka khoneha ho fokotsa litšenyehelo le ho sebelisa li-inductors tse nyenyane le li-capacitor.Tse ling tsa lisebelisoa tse ncha li boetse li eketsa likarolo tse ngata tse ncha tse kang qalo e bonolo, meeli ea hona joale, PFM, kapa khetho ea mokhoa oa PWM.
Ka kakaretso, khetho ea DCDC bakeng sa boost ke tlamo.Bakeng sa buck, khetho ea DCDC kapa LDO ke papiso ho latela litšenyehelo, bokhoni, lerata le ts'ebetso.
Liphapang tse ka sehloohong
LDO ke "micro-power low dropout linear regulator" eo hangata e nang le lerata le tlase haholo le tekanyo e phahameng ea ho hana phepelo ea matla (PSRR).
LDO ke moloko o mocha oa balaoli ba potoloho ba kopantsoeng, e fapaneng haholo le teko ka hore LDO ke tsamaiso e nyenyane ea chip (SoC) e nang le tšebeliso e tlaase haholo ea boipheliso.E ka sebelisoa bakeng sa taolo ea setsi sa hajoale, chip e kenyellelitse li-MOSFET tse nang le ts'ireletso e tlase haholo ea marang-rang, li-Schottky diode, li-resistors tsa sampole, li-voltage divider resistors, le li-circuits tse ling tsa Hardware, 'me e na le ts'ireletso ea morao-rao, mocheso o feteletseng. tshireletso, mohloli oa boitsebiso o nepahetseng, amplifier ea phapang, ho lieha, joalo-joalo PG ke moloko o mocha oa LDO, ka mokhoa o mong le o mong oa ho itlhahloba, ho lieha ho sebetsa ka matla a tšireletso, ho ka boela ha bitsoa Power Good, ke hore "power good or power stable" .
sebopeho le molao-motheo
Sebopeho le molao-motheo oa ketso.
Sebopeho sa LDO low dropout linear regulator haholo-holo se kenyelletsa potoloho ea ho qala, yuniti e sa fetoheng ea mohloli o sa feleng, ho nolofalletsa potoloho, likarolo tsa tokiso, mohloli oa litšupiso, amplifier ea liphoso, marang-rang a hanyetsang maikutlo, potoloho ea ts'ireletso, joalo-joalo. ka tsela e latelang: tsamaiso e matlafatsoa, haeba pini ea ho nolofalletsa e le boemong bo phahameng, potoloho e qala ho qala, potoloho ea mohloli oa kamehla e fana ka leeme ho potoloho eohle, 'me motlakase oa mohloli oa boitsebiso o thehoa ka potlako, tlhahiso e phahama ka ho tsoelang pele. ka ho kenya letsoho ha tlhahiso e le haufi le ho fihlela boleng bo boletsoeng, motlakase oa tlhahiso ea maikutlo o fumanoeng ke marang-rang a maikutlo le oona o haufi le boleng ba motlakase oa referense, ka nako ena amplifier ea phoso e tla ntša voltage ea maikutlo le voltage ea referense pakeng tsa The small lets'oao la phoso lea matlafatsoa, ebe le matlafatsoa ke tube ea tokiso ho phallo, ka hona ho etsa maikutlo a fosahetseng ho netefatsa hore motlakase oa tlhahiso o tsitsitse ka boleng bo boletsoeng.Ka mokhoa o ts'oanang, haeba motlakase o kenang o fetoha kapa tlhahiso ea hona joale e fetoha, potoloho ena e koetsoeng e tla boloka motlakase o sa fetohe.
Baetsi
TOREX, SII, ROHM, RICOH, Diodes, Prism Ame, TI, NS, Maxim, LTC, Intersil, Fairchild, Micrel, Natlinear, MPS, AATI, ACE, ADI, ST, joalo-joalo.