US 11,695,408 B2
Gate drive apparatus and method thereof
Junxiao Chen, Shanghai (CN); and Yingying Yang, Shanghai (CN)
Assigned to NuVolta Technologies (Heifei) Co., Ltd., Hefei (CN)
Filed by NuVolta Technologies (Hefei) Co., Ltd., Hefei (CN)
Filed on Oct. 26, 2022, as Appl. No. 18/49,691.
Application 18/049,691 is a continuation of application No. 17/457,141, filed on Dec. 1, 2021, granted, now 11,552,632.
Claims priority of application No. 202111383352.6 (CN), filed on Nov. 22, 2021.
Prior Publication US 2023/0163759 A1, May 25, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H03K 5/12 (2006.01); H03K 17/16 (2006.01)
CPC H03K 17/165 (2013.01) [H03K 5/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a plurality of pull-up switches connected in parallel between a first voltage bus and a gate of a power switch, wherein the plurality of pull-up switches is configured such that in a turn-on process of the power switch, a gate current of the power switch changes twice so that a low turn-on gate current flows into the gate of the power switch after a first high turn-on gate current and before a second high turn-on gate current; and
a plurality of pull-down switches connected in parallel between the gate of the power switch and a second voltage bus, wherein the plurality of pull-down switches is configured such that in a turn-off process of the power switch, the gate current of the power switch changes twice so that a low turn-off gate current flows out of the gate of the power switch after a first high turn-off gate current and before a second high turn-off gate current.