Multiphase driver device and three-phase driver device
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United States of America Patent
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Feb 5, 2019
Grant Date -
Jun 21, 2018
app pub date -
Nov 3, 2017
filing date -
Dec 16, 2016
priority date (Note) -
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Abstract
A multiphase driver device includes: one phase driver circuit of a first type including a first monitoring transistor and a first monitoring resistor generating a first voltage that is proportional to a first source current supplied to a one of the plurality of semiconductor switches; and a plurality of phase driver circuits of a second type each including a second monitoring transistor and a second monitoring resistor generating a second voltage that is proportional to that a second source current supplied to corresponding one of the remaining semiconductor switches, each of the plurality of phase driver circuits of the second type further including a comparator that compares the second voltage to the reference voltage, and a first regulating transistor that adds a first regulating current to the second source current in accordance with an output of the comparator.
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