Transcription of Determining MOSFET Driver Needs for Motor …
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Determining MOSFET Driver Needs for Motor …
2003 Microchip Technology 1 MAN898 INTRODUCTIONE lectronic Motor control for various types of motorsrepresents one of the main applications for MOSFET drivers today. This application note discusses some ofthe fundamental concepts needed to obtain the properMOSFET Driver for your bridging element between the Motor and MOSFET Driver is normally in the form of a power transistor. Thiscan be a bipolar transistor, MOSFET or an InsulatedGate Bipolar Transistor (IGBT). In some smallBrushless DC Motor or stepper Motor applications, theMOSFET Driver can be used to directly drive the this application note, though, we are going toassume that a little more voltage and power capabilityis needed than what the MOSFET drivers can purpose of Motor speed control is to control thespeed, direction of rotation or position of the motorshaft. This requires that the voltage applied to themotor is modulated in some manner. This is where thepower-switching element (bipolar transistor, MOSFET ,IGBT) is used.
2003 Microchip Technology Inc. DS00898A-page 3 AN898 MOSFET OR IGBT, WHAT’S BEST FOR YOUR APPLICATION? The two main choices for power-switching elements for
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