Invention Grant
- Patent Title: Common-mode insensitive current-sensing topology in full-bridge driver
-
Application No.: US17003564Application Date: 2020-08-26
-
Publication No.: US11290071B2Publication Date: 2022-03-29
- Inventor: Ramin Zanbaghi , Cory J. Peterson , Anand Ilango , Eric Kimball
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: GB Edinburgh
- Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee Address: GB Edinburgh
- Agency: Jackson Walker L.L.P.
- Main IPC: H03F3/217
- IPC: H03F3/217 ; H03F3/45 ; H03F1/38 ; G05F1/46 ; H04R1/10 ; G01R1/20 ; G01R19/175 ; G01R19/165

Abstract:
A system may include a Class-D stage comprising a first high-side switch coupled between a supply voltage and a first output terminal of the Class-D stage, a second high-side switch coupled between the supply voltage and a second output terminal of the Class-D stage, a first low-side switch coupled between a ground voltage and the first output terminal, and a second low-side switch coupled between the ground voltage and the second output terminal. The system may also include current sensing circuitry comprising a first sense resistor coupled between the first high-side switch and the supply voltage, such that an output current through a load coupled between the first output terminal and the second output terminal causes a first sense voltage proportional to the output current across the first sense resistor when the first high-side switch is activated. The current sensing circuitry may also include a second sense resistor coupled between the second high-side switch and the supply voltage, such that an output current through the load causes a second sense voltage proportional to the output current across the second sense resistor when the second high-side switch is activated. The system may also include measurement circuitry configured to measure the first sense voltage and the second sense voltage to determine the output current.
Public/Granted literature
- US20210344310A1 COMMON-MODE INSENSITIVE CURRENT-SENSING TOPOLOGY IN FULL-BRIDGE DRIVER Public/Granted day:2021-11-04
Information query
IPC分类: