US 12,445,121 B2
High-side current acquisition and safety protection circuit of a power electronic switch
Tinghua Yuan, Anhui (CN)
Assigned to HEFEI CHUANGYUAN VEHICLE CONTROL TECHNOLOGY CO., LTD, Anhui (CN)
Appl. No. 18/274,468
Filed by HEFEI CHUANGYUAN VEHICLE CONTROL TECHNOLOGY CO., LTD, Anhui (CN)
PCT Filed Jan. 28, 2022, PCT No. PCT/CN2022/074488
§ 371(c)(1), (2) Date Sep. 11, 2023,
PCT Pub. No. WO2022/161451, PCT Pub. Date Aug. 4, 2022.
Claims priority of application No. 202110130329.X (CN), filed on Jan. 29, 2021.
Prior Publication US 2024/0128964 A1, Apr. 18, 2024
Int. Cl. H03K 17/082 (2006.01)
CPC H03K 17/0822 (2013.01) [H03K 17/0828 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A high-side current acquisition and safety protection circuit of a power electronic switch, comprises:
a power electronic switch (1) for driving a load (2);
a power supply (VP) for providing power energy to the power electronic switch;
a control module (3) for sensing a current source signal contained in the power electronic switch, and converting the sensed current source signal into a control signal for safety protection of the power electronic switch; and
an isolated power source (4) for providing working power to the control module, and a negative electrode of the isolated power source is connected to a positive electrode of the power supply (VP),
wherein an input terminal of the power electronic switch (1) is connected to the power supply (VP), and an output terminal is connected to a load, wherein the power electronic switch (1) comprises an insulated gate MOSFET,
wherein the control module (3) comprises a logic control unit (31), a signal conditioning unit (32) for transforming the current source signal of the power electronic switch, and a drive conditioning unit (33) for transforming the control signal for safety protection input by the logic control unit, and
wherein an output port (IO-1) of the logic control unit (31) is connected to a command input port CIN of the drive conditioning unit (33), and an output port (OUT) of the drive conditioning unit (33) is connected to a control terminal (TG) of the power electronic switch (1), wherein the control terminal (TG) is connected to a gate of the power electronic switch (1) through a first resistor (R1), wherein an input signal of the command input port (CIN) of the drive conditioning unit (33) is a logic level signal, wherein an output signal of the output port (OUT) of the drive conditioning unit (33) is a level signal for driving the power electronic switch, and the level signal is used to control the conduction of the MOSFET.