Invention Grant
- Patent Title: Adaptive gate driver
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Application No.: US16946755Application Date: 2020-07-06
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Publication No.: US11271557B2Publication Date: 2022-03-08
- Inventor: Zhiwei Liu , Marc Dagan , Xudong Huang
- Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Applicant Address: US AZ Phoenix
- Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
- Current Assignee Address: US AZ Phoenix
- Agency: Brake Hughes Bellermann LLP
- Main IPC: H02M1/08
- IPC: H02M1/08 ; H03K17/687 ; H03K17/082 ; H02M3/158 ; G05F1/573 ; G05F1/56 ; H02M1/00

Abstract:
An adaptive gate driver for a driving a power MOSFET to switch is disclosed. The adaptive gate driver includes a load sense circuit to sense a current through the power MOSFET. A controller coupled to the load sense circuit compares the sensed current to a threshold to determine if the load on the power MOSFET is a normal load or a heavy load. Based on the comparison, the controller controls the gate driver to drive the power MOSFET with a first strength level when a normal load determined and at second strength level when a heavy load is determined. The driving strength in the heavy-load condition is lower than the normal-load condition and by lowering the driving strength of the gate driver during the heavy-load condition a voltage across the power MOSFET may be prevented from exceeding a threshold related to a breakdown condition during a switching period.
Public/Granted literature
- US20200336140A1 ADAPTIVE GATE DRIVER Public/Granted day:2020-10-22
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