A can transceiver module

Abstract

The invention discloses a CAN transceiver module, comprising a CAN transceiver; a digital isolation unit connected with the CAN transceiver, receiving external digital signals and sleep control signals, electrically isolating the CAN transceiver and controlling the sleep or wake-up of the CAN transceiver ; Connected with the CAN transceiver and the digital isolation unit, an isolation power supply for supplying power to the CAN transceiver and the digital isolation unit; Connected with the isolation power supply, used to receive external sleep control signals to control the isolation power supply sleep or wake up power supply control unit. It realizes electrical isolation and reduces common mode interference; when the CAN transceiver and the isolated power supply are in a dormant state, the CAN transceiver can receive data from the CAN bus terminal, but cannot send data. The loss of the power supply itself is also reduced. When the CAN transceiver module is awakened, the CAN transceiver and the isolated power supply return to normal operation, thereby reducing the power consumption of the CAN transceiver module without affecting the normal communication of the bus.

Description

technical field [0001] The invention relates to the field of CAN communication, in particular to a CAN transceiver module. Background technique [0002] In industries such as industrial control, automotive and BMS, CAN bus is widely used. Because the CAN bus is widely used in various industries, its application environment is also very different, and the bus communication is easily disturbed by the external environment. In order to ensure reliable bus communication, isolated CAN transceivers have been widely used. The isolated CAN transceiver has the function of electrical isolation, and at the same time, it can effectively reduce the influence of common mode interference on the bus, and greatly improve the reliability of bus communication. [0003] However, in some industries such as BMS, CAN transceivers with low power consumption are usually required. In these industries, batteries are usually used for power supply, and the requirements for power consumption are very hi...

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Problems solved by technology

[0003] However, in some industries such as BMS, CAN transceivers with low power consumption are usually required. In these industries, batteries are usually used for power supply, and the requirements for power consumption are very high. If a general isolated CAN transceiver is used, even if it is not Data is sent and received, and the transceiver is also in a normal working state, there will be a large electrostatic current, which greatly accelerates the consumption of battery energy; if the isolated transceiver that does not need to send data is completely cut off from the power supply, or the transceiver is prohibited from working, although it can be effective To reduce the loss, but at the same time, the data of the bus cannot be received, which will affect the communication of the bus

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