16 pin 1717109-3 90980-12F79 Auto Wire Cable Harness Auto Connector Housing Plug 0.7 Series

The Importance of Automotive Grid Security

With the improvement of people's quality of life, cars are becoming more and more popular in modern society. As the number of cars continues to grow, there are more and more road traffic safety accidents. In order to reduce safety hazards, in addition to constantly improving road safety regulations and strengthening It is also essential for OEMs to strengthen car safety design by driving education for all citizens. In recent years, the rise of technologies such as smart cars and the Internet has also made the development of automotive safety technology face a new situation. 

First, what is a power grid? Power generation, power supply (transmission, distribution), and power consumption form a power system, and the power grid includes power supply and power consumption.

Among them, the power supply system is the basis for the normal operation of the car. With the improvement of people's demand for car comfort and entertainment, the number of electronic and electrical equipment in the car has increased rapidly, resulting in the battery being easily over-discharged, energy consumption increasing, the power supply wiring harness being complex, and power supply security being compromised. problems such as reduction, difficulty in fault diagnosis, etc.

Current status of automotive power grid 

The traditional mechanical control method of switch-relay combination makes the power supply circuit in the car complicated, and there are more hidden dangers in the safety of power supply. On the other hand, the current power supply system of automobile electrical appliances does not carry out any information on power supply status and power consumption. Monitoring and control, even more unable to realize the intelligent security management of the system.

Therefore, information and communication technologies are used to monitor all nodes in the power generation, distribution, and power consumption processes in real time, and obtain comprehensive information about the entire power grid in real time. This enables the intelligent and networked automotive power supply system to effectively solve battery management, energy optimization, A series of issues such as fault diagnosis and electricity safety.

Semiconductor characteristics

The most basic unit in semiconductors is the "PN junction", which has unidirectional conductivity. When a positive voltage is applied to the P terminal, the N terminal is grounded, and when the voltage is large enough, there will be current at both ends, reversed or When the voltage does not reach the critical value, it will not conduct. This is the working principle of the diode. Its conductivity controllability enables semiconductors to be widely used in integrated circuits.

Power semiconductors realize power switching and power conversion functions through the unidirectional conductivity of semiconductors. According to the driving form, power semiconductors can be divided into current driven type, voltage driven type and light driven type.

In chip design, the smallest unit of production is the MOS tube. After the MOS tube is combined and packaged, the chip we want is obtained. 

MOS tubes are further divided into N-channel MOS tubes and P-channel MOS tubes. In practical applications, NMOS is more widely used due to its excellent characteristics. Generally speaking, when the input terminal of NMOS is high level, the field effect transistor is turned on and the output terminal is grounded. Works well as a low side drive loop. On the contrary, when the input terminal of PMOS is low level, the field effect transistor is turned on, and the output terminal is connected to the positive electrode of the power supply, which can be used for high-end driving. But due to the on-resistance

Due to reasons such as large size, high price, and few communication types, NMOS is usually used in high-end drivers.

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