Automotive electronic circuit design atlas - circuit diagram reading every day (223)

Car Audio Crystal 3.2*2.5mm 3225 24M (24.000MHZ) 20PF 10PPM 20PPM 30PPM

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

inductance

SMD aluminum electrolytic capacitor

With the development of the automotive industry, the number of electronic control systems on automobiles has increased exponentially. The ECU-centric in-vehicle electronic control system has gradually replaced passive and mechanical systems, and has also completed most of the functions of measurement, drive and control. The increase in the number of new in-vehicle electronic control systems in vehicle applications has resulted in an increase in power load of approximately 100 W per year. The biggest challenge currently is to find new ways to ensure the number and functionality of automotive electronics under the same battery power conditions. Therefore, in practical applications, the power consumption of the MCU needs to be continuously reduced.

Automotive power electronic circuit diagram

LM2940: 5V, differential voltage 0.5V, 2940 series linear regulator power supply chip is selected, which has the advantages of small ripple and simple circuit structure. It is used to supply power for single chip microcomputer, laser sensor and encoder; LM1117-ADJ: rudder 6V voltage of the machine; LM1117-3.3: 3.3V voltage of the wireless module

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LM2940: 5V LM1117-ADJ: 6V voltage of the servo

Standard car models that are uniformly distributed using the smart car race are powered by 7.2V 2000mAh Ni-cd, while single-chip microcomputers, laser sensors, photoelectric encoders, etc. all require 5V power supply, servo steering gear (including front wheel steering gear and rear wheel brake servo). The rated working voltage is 6V, and the DC motor can be directly powered by the 7.2V battery. The 5V regulated power supply is used for power supply of single chip microcomputer, laser sensor module and photoelectric encoder module.