- Patent Title: Use of additional resistances and capacitances by optimization to solve gate voltage oscillation during short circuit turn-off protection for a semiconductor switch
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Application No.: US15682392Application Date: 2017-08-21
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Publication No.: US10574152B2Publication Date: 2020-02-25
- Inventor: Chi-Ming Wang , Ercan M. Dede , George C. Bucsan
- Applicant: Toyota Motor Engineering & Manufacturing North America, Inc.
- Applicant Address: US TX Plano
- Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
- Current Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
- Current Assignee Address: US TX Plano
- Agency: Snell & Wilmer LLP
- Main IPC: H02M7/06
- IPC: H02M7/06 ; H02M1/32 ; H03K17/082 ; H03K17/16 ; H02M1/088 ; H02M1/34 ; H02M1/00

Abstract:
Bridge circuits provide a reduced amplitude of gate-source voltage oscillation when the switches switch states during short circuit triggered turnoff for protection. Bridge circuits reduce an amplitude of an oscillation voltage between a gate and a source of a transistor that is utilized as a switch in the bridge circuit. This is beneficial because the reduced amplitude reduces the likelihood of damage to the transistor. A bridge circuit includes a first power rail and a second power rail. The bridge circuit further includes a first circuit having a first switch and a second switch connected in parallel between the first power rail and the second power rail. The bridge circuit further includes at least one passive circuit element connected in parallel with a primary energy flow path of the first circuit to damp oscillation voltage of the first circuit.
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