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Litšobotsi tsa Sehlahisoa
| MOFUTA | TLHALOSO |
| Sehlopha | Lipotoloho tse Kopantsoeng (ICs) PMIC - Voltage Regulators - DC DC Switching Regulators |
| Mfr | Lisebelisoa tsa Texas |
| Letoto | SIMPLE SWITCHER® |
| Sephutheloana | Theipi le Reel (TR) Seha Tape (CT) Digi-Reel® |
| SPQ | 75Tu be |
| Boemo ba Sehlahiswa | E sebetsa |
| Mosebetsi | Phahamisa |
| Tlhophiso ea Sephetho | E ntle |
| Topology | Buck |
| Mofuta oa Sephetho | E ka fetoha |
| Palo ea Litholoana | 1 |
| Voltage - Kenyo (Mots) | 4.3V |
| Voltage - Kenyo (Boholo) | 60V |
| Voltage - Output (Min/Fixed) | 0.8V |
| Voltage - Output (Boholo) | 50V |
| Hajoale - Sephetho | 2A |
| Khafetsa - Ho fetoha | 200kHz ~ 2.5MHz |
| Synchronous Rectifier | No |
| Mocheso oa ho sebetsa | -40°C ~ 125°C (TJ) |
| Mofuta oa ho Beha | Thaba e kaholimo |
| Sephutheloana / Taba | 8-PowerSOIC (0.154", 3.90mm Bophara) |
| Sephutheloana sa Sesebelisoa sa Bafani | 8-SO PowerPad |
| Nomoro ea Sehlahisoa sa Motheo | LMR16020 |
Libaka life?
Ke libaka life tse fetolang lisebelisoa tsa motlakase le lisebelisoa tsa motlakase tse loketseng
Ho fetola lisebelisoa tsa motlakase ha ho hloke hore transformer e fetole matla a mohala oa AC ka ho toba ho motlakase oa DC, ebe o fetola motlakase oo o tala oa DC hore e be lets'oao le phahameng la AC le tla sebelisoa potolohong ea taolo ho hlahisa motlakase o hlokahalang le oa hona joale.
Moralo oa phepelo ea matla o sebelisa mohala oa mohala oa AC ho sesebelisoa sa motlakase ho phahamisa kapa ho theola motlakase pele o sebelisoa ho potoloho ea taolo.Kaha boholo ba transformer bo sa lekane ka tsela e sa tobang le lebelo la ts'ebetso, sena se ka fella ka matla a maholo le a boima.
Mofuta o mong le o mong oa ts'ebetso ea phepelo ea motlakase o na le melemo le mefokolo ea ona.Motlakase o feto-fetohang o nyane ka liperesente tse 80 ebile o bobebe ho feta phepelo ea motlakase e tsamaisanang le eona, empa o hlahisa lerata le phahameng haholo le ka sitisang lisebelisoa tsa elektroniki.Ho fapana le phepelo ea motlakase ea mohala, phepelo ea motlakase e fetohang e ka mamella tahlehelo ea AC ho 10-20 ms ntle le ho ama tlhahiso.
Lisebelisoa tsa motlakase tsa linear li hloka lisebelisoa tse kholoanyane tsa semiconductor ho laola motlakase o hlahisoang ke hona ho hlahisa mocheso o mongata, o fokotsang matla a matla.Bakeng sa tlhahiso ea 24V, lisebelisoa tsa motlakase tsa mohala hangata li sebetsa hantle ka liperesente tse 60, ha li bapisoa le liperesente tse 80 kapa ho feta bakeng sa phepelo ea motlakase oa mofuta oa switch.Lisebelisoa tsa motlakase tsa linear li na le nako e potlakileng ea karabelo ea nakoana ho feta balekane ba bona ba switch-mode, e leng ea bohlokoa libakeng tse itseng.Ka tloaelo, lisebelisoa tsa motlakase tsa li-switch mode li bobebe ebile li kopane, li etsa hore li tšoanele lisebelisoa tse nkehang habonolo.Lisebelisoa tsa motlakase tsa linear li loketse ho matlafatsa li-circuits tsa analog ka lebaka la lerata la tsona le tlaase la motlakase le ho laola habonolo.
Liphoso tse tloaelehileng
Mathata a tloaelehileng a ho fetola lisebelisoa tsa motlakase.
Ke phoso efe e tloaelehileng ea ho fetola lisebelisoa tsa motlakase?Phoso e tloaelehileng ea ho fetola phepelo ea matla ke switching transistor ka boeona.Transistor e khuts'oane e etsa hore palo e kholo ea hona joale e phalle ka har'a transformer ebe e otla fuse.
Ho hloleha ha transistor hangata ho bakoa ke li-capacitor tse mpe.Fumana capacitor ea filthara e ruruhileng kapa e lutlang 'me u nkele li-capacitor tse shebahalang li le mpe.Ho thibela ho hloleha hona ho tloaelehileng hore ho se ke ha etsahala hape, capacitor ea filthara e hlahisoang e lokela ho nkeloa sebaka ke capacitor.Boholo ba bahlahisi ba phepelo ea motlakase ha ba kenye li-capacitor tse tlase tsa ESR joalo ka lisebelisoa tsa mantlha hobane li batla li le theko e boima ho feta li-capacitor tse tloaelehileng.Leha ho le joalo, ho molemo ho li sebelisa e le lisebelisoa tse ncha kaha li tla ntlafatsa haholo bophelo ba phepelo ea motlakase.
Ho hlōleha ha diode ke bothata bo bong bo tloaelehileng.Ho na le li-diode tse ngata phepelong ea matla a ho feto-fetoha 'me ho hloleha ha diode e le' ngoe ho ka etsa hore phepelo ea motlakase e letse fuse kapa e koalehe.Ho hloleha ho tloaelehileng ha diode ke potoloho e khuts'oane ho +12 volt kapa -5 volt output rectifier.Tse ling tsa liphoso tsena li ka bakoa ke tšebeliso ea liphetho tsa +12 kapa -5 volt.The high voltage input diode le eona e ka khutsufatsoa.
Mabapi le Sehlahisoa
LMR16020 ke 60 V, 2 A SIMPLE SWITCHER® regulator ea mehato e tlase e nang le MOSFET e holimo e kopantsoeng.Ka mefuta e mengata ea ho kenya letsoho ho tloha ho 4.3 V ho isa ho 60 V, e loketse lits'ebetso tse fapaneng ho tloha indastering ho ea ho likoloi bakeng sa ho lokisa matla ho tsoa mehloling e sa laoleheng.Nako e khutsitseng ea molaoli ke 40 µA ka mokhoa oa Boroko, e loketseng lisebelisoa tse tsamaisoang ke betri.Tekanyo e tlase haholo ea 1 µA ha o ntse o koala e ka lelefatsa bophelo ba betri.Mefuta e mengata e feto-fetohang ea maqhubu a feto-fetohang e lumella bokhoni bo botle kapa boholo ba karolo ea kantle ho ntlafatsoa.Matšeliso a ka hare a loop a bolela hore mosebelisi ha a na mosebetsi o khathatsang oa moralo oa matšeliso a loop.Sena se boetse se fokotsa likarolo tsa kantle tsa sesebelisoa.Ho kenya letsoho ka nepo ho lumella ho nolofatsa taolo ea balaoli le tatellano ea matla a sistimi.Sesebelisoa se boetse se na le likarolo tsa ts'ireletso tse hahelletsoeng joalo ka moeli oa hajoale oa cycle-by-cycle, sensing ea mocheso le ho koala ka lebaka la ho felloa ke matla ho feteletseng, le ts'ireletso ea tlhahiso ea overvoltage.
LMR16020 e fumaneha ka har'a sephutheloana sa 8-pin HSOIC se nang le pad e pepesitsoeng bakeng sa khanyetso e tlase ea mocheso.
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