公开(公告)号：US12160196B2

公开(公告)日：2024-12-03

申请号：US18049969

申请日：2022-10-26

Applicant: Alpha and Omega Semiconductor International LP

Inventor： ChengYuan He ,  Sitthipong Angkititraku ,  Jian Yin ,  Lin Chen

IPC: G01R19/165 ,  H02P6/28 ,  H02P27/08 ,  H02K7/14

Abstract: Apparatus and associated methods relate to a Source Terminal Replication Compensation Circuit for simulating an accurate fraction of a load current. In an illustrative example, a Source Terminal Replication Compensation Circuit (STRCC) may be connected to a motor driving circuit. The STRCC, for example, may include a simulation transistor configured to have a simulated structure of a main transistor in a motor driving circuit. The STRCC may include, for example, a disturbance rejection module (DRM). The DRM may be connected to a source terminal of the sense transistor, and a source terminal of the main transistor. When the DRM is connected to a current sensing resistor, a sense current is generated as a predetermined fraction of a load current of the motor driving circuit, wherein the predetermined fraction is less than 1%. Various embodiments may advantageously reduce heat dissipations at the current sensor resistor.

公开(公告)号：US20240146218A1

公开(公告)日：2024-05-02

申请号：US18049969

申请日：2022-10-26

Applicant: Alpha and Omega Semiconductor International LP

Inventor： ChengYuan He ,  Sitthipong Angkititraku ,  Jian Yin ,  Lin Chen

IPC: H02P6/28 ,  H02P27/08

CPC classification number: H02P6/28 ,  H02P27/08 ,  H02K7/145

Abstract: Apparatus and associated methods relate to a Source Terminal Replication Compensation Circuit for simulating an accurate fraction of a load current. In an illustrative example, a Source Terminal Replication Compensation Circuit (STRCC) may be connected to a motor driving circuit. The STRCC, for example, may include a simulation transistor configured to have a simulated structure of a main transistor in a motor driving circuit. The STRCC may include, for example, a disturbance rejection module (DRM). The DRM may be connected to a source terminal of the sense transistor, and a source terminal of the main transistor. When the DRM is connected to a current sensing resistor, a sense current is generated as a predetermined fraction of a load current of the motor driving circuit, wherein the predetermined fraction is less than 1%. Various embodiments may advantageously reduce heat dissipations at the current sensor resistor.