- 专利标题: Systems and methods for regulation of propagation delay in DC motor drivers
-
申请号: US17397133申请日: 2021-08-09
-
公开(公告)号: US12113521B2公开(公告)日: 2024-10-08
- 发明人: Ashish Ojha , Krishnamurthy Shankar , Siddhartha Gopal Krishna , Priyank Anand , Ganapathi Hegde
- 申请人: Texas Instruments Incorporated
- 申请人地址: US TX Dallas
- 专利权人: TEXAS INSTRUMENTS INCORPORATED
- 当前专利权人: TEXAS INSTRUMENTS INCORPORATED
- 当前专利权人地址: US TX Dallas
- 代理商 John R. Pessetto; Frank D. Cimino
- 主分类号: H03K17/687
- IPC分类号: H03K17/687 ; H02P23/00 ; H03K5/24
摘要:
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.
公开/授权文献
信息查询
IPC分类: