Motor controller with integrated MCU/PWM/LIN transceiver is with EGR
With the global energy reduction and the deterioration of the environment, people's awareness of energy crisis and environmental awareness have significantly improved. Nowadays, during the use of gasoline engines and diesel engines, NOX generated by insufficient fuel combustion is not only a waste of energy but also causes air pollution. It is in this context that the electronically controlled EGR system was born.
As an effective technical means to reduce vehicle exhaust emissions, the electronically controlled EGR system can maximize fuel economy and purify air, and has been widely used. Like many other systems used in motor vehicles, the electronically controlled EGR system improves driving performance while also placing more expectations and requirements on automotive electronics.
The electronically controlled EGR system uses an electronic control unit (ECU) as the control center, and uses various sensors mounted on the engine to measure various operating parameters of the engine, such as a rotational speed sensor, a water temperature sensor, a throttle position sensor, an ignition switch, and the like. The signal determines which operating condition the engine is currently operating to output commands to control the EGR solenoid valve to open or close, causing EGR to start or stop to accurately control the EGR rate.
Therefore, a motor controller with good dynamic response and high control accuracy is quite popular. Melexis's MLX81150 for DC drives integrates a wealth of resources, simple design, high reliability, low cost, small overall solution size, and very good match with EGR requirements.
Shiqiang's MLX81150 has two relay drivers and four power FET gate drivers. It can choose to drive relays or full-bridge control motors, and realize motor speed regulation through PWM to control the on and off states of EGR valves.
The MLX81150 integrates a high-performance 16-bit embedded flash microcontroller with 32K bytes of flash memory capacity for EGR motor control applications, and a built-in 4-bit central processor that fully handles the LIN protocol. It also has a LIN communication interface, which accepts commands through LIN to control the start/stop of the motor.
