公开(公告)号：US10020802B2

公开(公告)日：2018-07-10

申请号：US15634891

申请日：2017-06-27

Applicant: Eaton Intelligent Power Limited

Inventor： Tiefu Zhao ,  Jiangbiao He ,  Yakov Lvovich Familiant ,  Mengbin Ben Yang

IPC: H03K3/00 ,  H03K17/284

CPC classification number: H03K17/284 ,  H03K3/012 ,  H03K17/127 ,  H03K17/56 ,  H03K17/567 ,  H03K2217/0027 ,  H03K2217/0036

Abstract: An integrated circuit is provided with an MCU, which is configured to generate a PWM control signal that is free of switching pattern information therein. A current-estimating gate driver is provided, which is responsive to the PWM signal. This gate driver is configured to drive first and second gate terminals of first and second parallel switching devices (within a hybrid switch) with gate signals that establish a second switching pattern within the hybrid switch. These gate driving operations are performed in response to measuring a first voltage associated with a terminal of the hybrid switch when being driven by gate signals that establish a first switching pattern within the hybrid switch that is different from the second switching pattern. The duty cycles of the gate signals associated with the second switching pattern are unequal and the duty cycles of the gate signals associated with the first switching pattern are unequal.