Invention Grant
- Patent Title: Systems and methods for regulation of propagation delay in DC motor drivers
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Application No.: US17397133Application Date: 2021-08-09
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Publication No.: US12113521B2Publication Date: 2024-10-08
- Inventor: Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
- Applicant: Texas Instruments Incorporated
- Applicant Address: US TX Dallas
- Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee: TEXAS INSTRUMENTS INCORPORATED
- Current Assignee Address: US TX Dallas
- Agent John R. Pessetto; Frank D. Cimino
- Main IPC: H03K17/687
- IPC: H03K17/687 ; H02P23/00 ; H03K5/24

Abstract:
A control circuit regulates the propagation delay of a field effect transistor (FET) before the FET transitions to the Miller region by applying a pre-charge current for a fixed duration to the gates of the FET. After the fixed duration, the current is reduced to a lower drive current level which is based on a desired output voltage slew rate. After the FET transitions to the Miller region, the output voltage slews down in accordance with the output voltage slew rate. By regulating the slew-rate of the output voltage in the Miller region and regulating the propagation delay of the FET prior to the Miller region, the control circuit reduces electromagnetic interference (EMI) caused by the switching of the FET, thereby improving electromagnetic compatibility (EMC) of switch mode driver systems without increasing the propagation delay of the FET.
Public/Granted literature
- US20230039198A1 Systems and Methods for Regulation of Propagation Delay in DC Motor Drivers Public/Granted day:2023-02-09
Information query
IPC分类: