Invention Grant
- Patent Title: Over current protection concept for negative load current of power device gate drivers
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Application No.: US17560382Application Date: 2021-12-23
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Publication No.: US11722053B2Publication Date: 2023-08-08
- Inventor: Stefan Hermann Groiss , Emanuele Bodano
- Applicant: Infineon Technologies Austria AG
- Applicant Address: AT Villach
- Assignee: Infineon Technologies Austria AG
- Current Assignee: Infineon Technologies Austria AG
- Current Assignee Address: AT Villach
- Agency: Harrity & Harrity, LLP
- Main IPC: H02M1/32
- IPC: H02M1/32 ; H03K17/082 ; H03K5/24

Abstract:
A method is provided for driving a half bridge circuit that includes a first transistor and a second transistor that are switched in a complementary manner. The method includes generating an off-current during a plurality of turn-off switching events to control a gate voltage of the second transistor; measuring a transistor parameter of the second transistor during a first turn-off switching event during which the second transistor is transitioned to an off state, wherein the transistor parameter is indicative of an oscillation at the first transistor during a corresponding turn-on switching event during which the first transistor is transitioned to an on state; and activating a portion of the off-current for the second turn-off switching event, including regulating an interval length of the second portion for the second turn-off switching event based on the measured transistor parameter measured during the first turn-off switching event.
Public/Granted literature
- US20230208280A1 OVER CURRENT PROTECTION CONCEPT FOR NEGATIVE LOAD CURRENT OF POWER DEVICE GATE DRIVERS Public/Granted day:2023-06-29
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