Methods and apparatus for continuous current limiting for FETS in high inductive load systems

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United States of America Patent

PATENT NO 9871514
SERIAL NO

15196323

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus includes a FET device having a drain terminal, source terminal and a gate terminal; a first supply voltage coupled to the drain terminal of the FET; an output terminal coupled to the source terminal of the FET; a bias current supply coupled to the gate terminal of the FET; a second supply voltage coupled to the gate terminal of the FET; a current sensing circuit coupled to output a sense current proportional to the current flowing through the FET; a current limit comparator coupled to the sense current and comparing the sense current to a predetermined limit current; a pull down current circuit coupled to remove current from the gate terminal of the FET; a current time derivative circuit coupled to the sense current and outputting a sense rate current; and a circuit coupled to receive the sense rate current and coupled to the bias current supply.

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Patent Owner(s)

Patent OwnerAddress
TEXAS INSTRUMENTS INCORPORATED12500 TI BOULEVARD MS 3999 DALLAS TX 75243

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aras, Sualp Dallas, US 19 69
Rahman, Abidur Richardson, US 26 157
Schulmeyer, Kyle Plano, US 7 18

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