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Topologies for switch mode power supplies

APPLICATION NOTETOPOLOGIES FOR SWITCHED MODEPOWER SUPPLIESby L. Wuidartthe rectifier, different types of voltageconverters can be made:- Step down Buck regulator- Step up Boost regulator - Step up / Step down Buck - Boost regulatorII - 1 The Buck converter : Step downvoltage regulatorThe circuit diagram, often referred to as a chopper circuit, and its principal waveformsare represented in figure 1:This paper presents an overview of the mostimportant DC-DC converter Topologies . Themain object is to guide the designer in selectingthe topology with its associated powersemiconductor INTRODUCTIONThe DC-DC converter Topologies can bedivided in two major parts, depending onwhether or not they have galvanic isolationbetween the input supply and the NON - isolated SWITCHINGREGULATORSA ccording to the position of the switch andAN513/03931/18 Figure 1: The step down Buck regulatorThe power device is switch

III - ISOLATED CONVERTERS: The isolated converters can be classified according to their magnetic cycle swing in the B-H plot (see figure 4). An isolated converter is asymmetrical if the magnetic operating point of the transformer remains in the same quadrant. Any other converter is, of course, called symmetrical. STEP DOWN STEP UP STEP UP/DOWN 5/18

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  Converter, Isolated, Isolated converter

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