Vehicle and switch control circuit thereof

By using the combination of isolation amplifier circuit and driving circuit in the vehicle, the poor sensitivity and high energy consumption problems when the relay drives the MOS tube are solved, and the stable driving and circuit simplification of the MOS tube is achieved, and the power supply needs are reduced.

CN114337282BActive Publication Date: 2024-12-13SHANGHAI ECAR TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202111659308.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-12-30
Publication Date
2024-12-13
Estimated Expiration
2041-12-30

AI Technical Summary

Technical Problem

In existing vehicles, the MOS tube driving circuit is composed of relays, which has poor sensitivity and large space, and has problems of energy shock and electromagnetic interference, and requires a large driving power supply, which is not conducive to circuit simplification.

Method used

Using a switch control circuit including an isolated amplification circuit and a driving circuit, the second power supply signal is amplified and transmitted to the driving circuit in one direction through the isolation amplification circuit. The driving circuit controls the first MOS tube and the second MOS tube to be turned on or according to the external control signal. Disconnect, reduce power settings and simplify circuit structure.

Benefits of technology

It realizes stable driving of MOS tubes, reduces energy consumption and electromagnetic interference, simplifies the circuit structure, and only a small second power supply is needed to drive the MOS tubes, improving the sensitivity and stability of the system.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN114337282B_ABST
    Figure CN114337282B_ABST
Patent Text Reader

Abstract

The present invention discloses a vehicle and a switch control circuit thereof, which are used for controlling the on or off of a switch. The switch comprises a first MOS tube and a second MOS tube, and the switch control circuit comprises an isolation amplifier circuit and a drive circuit; the isolation amplifier circuit is electrically connected to a second power supply and an input end of the drive circuit respectively; the isolation amplifier circuit is used for amplifying a second power supply signal provided by the second power supply, and unidirectionally transmitting the amplified second power supply signal to the drive circuit; the control end of the drive circuit is electrically connected to an external controller, and the output end of the drive circuit is electrically connected to the control electrodes of the first MOS tube and the second MOS tube; the drive circuit is used for controlling the on or off of the first MOS tube and the second MOS tube according to a switch control signal provided by the external controller and the amplified second power supply signal, so that only a second power supply E2 with a smaller voltage value is required to realize the driving of the first MOS tube M1 and the second MOS tube M2, thereby reducing the power supply setting in the circuit and being conducive to simplifying the circuit structure.
Need to check novelty before this filing date? Find Prior Art