Fairchild - AN-7511

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Contents

FAIROHII P SEMICONDUCTOR 1 Insulated Gate Transistors Simplify AC Motor Speed Control Application Note September 1993 AN 7511 An IGT s few input requirements and low On state resistance simplify drive circuitry and increase power efficiency in motor control applications The voltage controlled MOSFET like input and transfer characteristics of the insulated gate transis tor IGT see EDN September 29 1983 pg 153 for IGT details simplify power control circuitry when compared with bipolar devices Moreover the IGT has an input capacitance mirroring that of a MOSFET that has only one third the power handling capability These attributes allow you to design sim ple low power gate drive circuits using isolated or level shift ing techniques What s ...