Invention Grant
- Patent Title: Gate driver for switching converter having body diode power loss minimization
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Application No.: US16149745Application Date: 2018-10-02
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Publication No.: US10439483B2Publication Date: 2019-10-08
- Inventor: Anatoliy V. Tsyrganovich , Leonid A. Neyman , Md Abdus Sattar , Vladimir Tsukanov
- Applicant: Littelfuse, Inc.
- Applicant Address: US IL Chicago
- Assignee: Littelfuse, Inc.
- Current Assignee: Littelfuse, Inc.
- Current Assignee Address: US IL Chicago
- Main IPC: H02M7/537
- IPC: H02M7/537 ; H02M1/08 ; H03K3/012 ; H03K17/082 ; H03K17/16 ; H03K17/687 ; H03K17/0412 ; H02M1/00

Abstract:
In a switching converter having an inductive load, a current may flow through the body diode of a transistor even though the gate of the transistor is being controlled to keep the transistor off. Then when the other transistor of the switch leg is turned on, a reverse recovery current flows in the reverse direction through the body diode. To reduce switching losses associated with such current flows, a gate driver integrated circuit detects when current flow through the body diode rises above a threshold current. The gate driver integrated circuit then controls the transistor to turn on. Then when the other transistor of the switch leg is made to turn on, the gate driver first turns the transistor off. When the gate-to-source voltage of the turning off transistor drops below a threshold voltage, then the gate driver integrated circuit allows and controls the other transistor to turn on.
Public/Granted literature
- US20190260281A1 Gate Driver For Switching Converter Having Body Diode Power Loss Minimization Public/Granted day:2019-08-22
Information query
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