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Switch Mode Power Supply

Switch Mode Power Supply. Adiyuda Prayitna. Konversi Daya listrik. Konversi daya listrik dibagi menjadi : ac-dc conversion called rectification ac-ac conversion , dc-ac conversion and dc-dc conversion.

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Switch Mode Power Supply

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  1. Switch Mode Power Supply AdiyudaPrayitna

  2. KonversiDayalistrik Konversidayalistrikdibagimenjadi : • ac-dc conversion called rectification • ac-ac conversion , • dc-ac conversion and • dc-dc conversion.

  3. DC-DC converters were referred to as choppers earlier, when SCRs were used. Nowadays, IGBTs and MOSFETs are the devices used for dc-dc conversion and these circuits can be classified as switch mode power supply circuits. The abbreviation or acronym for switch mode power supply is SMPS. • IGBT ->> Insulated Gate Bipolar Transistor • MOSFET ->> Metal–Oxide–Semiconductor Field-Effect Transistor

  4. Kegunaan SMPS • Menurunkan input DC-unregulated untukmenghasilkantegangan DC regulated menggunakanrangkaian yang dikenaldengannama Buck Converter atau Step down SMPS • Menaikkanteganganmasukan DC unregulated untukmenghasilkantegangan DC regulated mempergunakanrangkaian yang dikenaldengannama Boost Converter atau Step Up SMPS • Menaikkanataumenurunkantegangan DC unregulated untukmenghasilkanregulated DC. • Invert teganganmasukan DC menggunakanrangkaianCuk Converter • Menghasilkanberbagaitegangankeluaran DC menggunakanFly back converter

  5. STEP-DOWN /BUCK CONVERTER: IDEAL CIRCUIT • Buck converter ataustepdown switch mode power supply dapatjugadisebutsebagai switch mode regulator. Kepopuleran Switch mode regulator ditopangolehefisiensitinggidanrangkaian yang kompak, dan Switch mode regulator digunakanuntukmenggantikan linier voltage regulator berdayatinggi. Karena linier regulator tidakeffisien. Penggunaan linier regulator harusmendisipasikandayatinggimakaharusdidinginkansecaratepat, denganmemasangkanpadaheatsinksdanpanasdidistribusikankeudarasekitardenganmetodekonveksimaupundenganmetodeforced air cooling, heatsinksangatbesar, padasuatuapplikasidimanaukurandanefisiensisangatkritismakapenggunaan linear regulator bukanlahsebuahpilihan. • Switch mode regulator memilikikeuntunganjikadibandingkandenganliniear regulator, Switch mode regulator memilikiefisiensihingga 80% bahkanlebih, danukurannyajauhlebihkecildibandingkan linear regulator

  6. Contohrangkaian Switch mode regulator

  7. Step down SMPS

  8. Komponen step down SMPS • a pulse-width modulating controller, • a transistor switch, • an inductor , • a capacitor and • a diode.

  9. The buck converter or SMPS can be controlled in two ways, known as : • Constant-frequency operation or pulse-width modulation control • Variable-frequency operation or control by frequency modulation

  10. Practical Stepdown Regulator • PadadunianyatadiodadanMosfetmemilikibatasan.

  11. Test Diode recovery

  12. Boost converter • Dikenaljugasebagai step up converter, gunanyauntukmenaikkanteganganmasukan . • Secara ideal memiliki 5 komponen : • Power Semiconductor Switch • Dioda • Kapasitor • Inductor • PWM Controller

  13. Boost converter

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