Integrated Transceiver IC for EMI Noise Control in Vehicle Networks
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Solution Overview
Problem
As the number of electronic control units (ECUs) in vehicles increases, the number of CAN transceiver chips also grows, leading to packaging issues due to the larger size of the controller for central gateways, and there is a risk of electromagnetic interference (EMI) noise and overcurrent when multiple CAN transceivers are simultaneously turned on.
Innovation Solution
An integrated transceiver IC device is configured with multiple CAN transceivers, a monitoring portion, a wake-up detector, a controller, and a voltage regulator, which allows for parallel or sequential turning on of CAN transceivers to prevent EMI noise and overcurrent, and includes a serial peripheral interface for communication with a microcomputer, enabling efficient data transmission and reception between the central gateway and ECUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple CAN transceiver chips are used to support increasing number of ECUs, then communication capability is improved, but device size increases causing packaging problems
Solution Approach 1:
The patent merges multiple separate CAN transceiver chips into a single integrated transceiver IC device that contains multiple CAN transceivers in one chip. This consolidation maintains the communication capability to support multiple ECUs while eliminating the need for multiple separate chips, thereby resolving the packaging problem caused by increased device size.
2Speed
If multiple CAN transceivers are turned on simultaneously, then communication responsiveness is improved, but electromagnetic interference and overcurrent occur
Solution Approach 1:
The patent implements a sequential power-up mechanism where CAN transceivers are activated one after another rather than simultaneously. The controller enables transceivers in a predetermined sequence, ensuring that each transceiver is fully initialized and stabilized before the next one is activated. This preliminary sequential action prevents electromagnetic interference and overcurrent while maintaining communication responsiveness.
Data Source
AI summary
A transceiver integrated circuit (IC) device for a multi-channel, and a method of operating the same are provided. The transceiver IC device transmits and receives information and data between a central gateway (CGW) and a plurality of electronic control units (ECUs) using a controller area network (CAN). The transceiver IC device includes a plurality of CAN transceivers and a monitoring sensor that detects whether a transceiver IC device operates normally. A wake-up detector detects a wake-up signal transmitted via a network and a controller transmits and receives a CAN signal to and from the plurality of CAN transceivers. In addition, a serial peripheral interface (SPI) communication portion transmits and receives information and data from the controller to and from a microcomputer of the CGW.