Design and analysis of a low voltage overshoot CAN transceiver interface circuit

Abstract

To solve the problem pertaining to voltage overshoot arising from frequent switching in CAN transceiver interface circuits, and to mitigate electromagnetic interference while protecting the circuit, this paper proposes a new low-voltage overshooting CAN transceiver interface circuit based on a 0.18 μm BCD. The high-voltage switching transistor is controlled by comparing the bus voltage with a reference voltage to achieve real-time monitoring and protection of the bus voltage. The simulation results show that the interface circuit has excellent power consumption, anti-interference ability, and signal integrity, with a power consumption of 24.2 μA and bus voltage symmetry of 0.934-1.052 under the passive state of the bus.