Topic 4Main contentsLast lecture reviewLoss of power devicesDC-DC Switch-Mode ConvertersBuck converter
Main contents • Last lecture review • Loss of power devices • DC-DC Switch-Mode Converters • Buck converter Topic 4
DiodeGTOIGCT1Thyristor-11111BJT1SiCBJT111-1Gen.2Gen.6IGBT+Max.6500VMax.600v111MOSFET-1VSJ11n-1MOSFET1-SICJFET-11-SiCMOSFET-Sic diode11--GaNHEMTThyristor&MOSFETeraSiIGBTeraSiCand/orGaNera??19701990201020202013VOIE
GaNGaNSicHighendMOSFETTriacsIGBTBipolarThyristorIGCT格n品Lowend.Industry,EnerHomeappliances600Vorless200V120oVormore3.3kVandmoreMasstransportationConsumersystemsVoltageIGBTisgaining shares in highvoltage lowend solutionsandlowvoltagehighsolutions,thankstoitspriceerosion.SiC is to become thehighend solution inmedium and highvoltage.It is still uncertain to position GaN on this graph
IGBT is gaining shares in high voltage low end solutions and low voltage high solutions, thanks to its price erosion. SiC is to become the high end solution in medium and high voltage. It is still uncertain to position GaN on this graph
1SummaryDiode(1) Uncontrolled devicethvristor（晶闸管or(2) Half-controlled deviceSiliconcontrolledRectifier（可控硅turned-on by a control signal and turned-off bythe power circuit(3) Fully-controlled devicePowerMOSFETIGBI, BJT, GTO, IGCTThe on and off states of the device arecontrolled by control signals
⑴ Uncontrolled device —— Diode 1 Summary ⑵ Half-controlled device ——thyristor (晶闸管)or Silicon controlled Rectifier (可控硅) turned-on by a control signal and turned-off by the power circuit ⑶ Fully-controlled device——Power MOSFET, IGBT, BJT, GTO, IGCT The on and off states of the device are controlled by control signals
Other classificationsV Current-driven (current-controlled) devicesVVoltage-driven (voltage-controlled) devices (Field-controlled devices)>Pulse-triggered devices>Level-sensitive (level-triggered)devices.Unipolardevices（单极型器件）（Majoritycarrierdevices)·Bipolardevices（双极型器件）（Minoritycarrierdevices)·Compositedevices（复合型器件）6
6 Other classifications ✓Current-driven (current-controlled) devices ✓Voltage-driven (voltage-controlled) devices (Fieldcontrolled devices) ➢Pulse-triggered devices ➢Level-sensitive (level-triggered) devices ⚫Unipolar devices (单极型器件) (Majority carrier devices) ⚫Bipolar devices (双极型器件) (Minority carrier devices) ⚫ Composite devices (复合型器件)