Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

The automobile industry has experienced a century of development. In addition to traditional fuel vehicles, as people’s awareness of environmental protection has increased, new energy vehicles have become an inevitable choice for the development of a low-carbon economy and an inevitable trend for the future development of the automobile industry. New energy, also known as unconventional energy, refers to various forms of energy besides traditional energy.

The automobile industry has experienced a century of development. In addition to traditional fuel vehicles, as people’s awareness of environmental protection has increased, new energy vehicles have become an inevitable choice for the development of a low-carbon economy and an inevitable trend for the future development of the automobile industry. New energy, also known as unconventional energy, refers to various forms of energy besides traditional energy. New energy vehicles have more stringent protection requirements for Electronic circuit systems. The increase in electronic control, in-vehicle entertainment multimedia, navigation, and in-vehicle communications has led to more and more protective ports for electronic circuits. At the same time, the electromagnetic environment of automobile ports is more stringent than that of consumer electronics. Bad, as the core component of new energy vehicles, the surge protection of the three-electric system is not only related to vehicle performance, but also closely related to driving safety.

WAYON (WAYON) WSxxP30SMC(-B)-AT series product is a high-reliability automotive-grade TVS product. As a clamp-type overvoltage protection device, it can be connected in parallel to both ends of the protected circuit when used. It has the characteristics of precise conduction, fast response, strong surge absorption capacity and high reliability. It is suitable for the instantaneous overvoltage protection of ports such as body power supply, navigation instrument, car lights, etc. The package form of WSxxP30SMC(-B)-AT series is conventional SMC (8.0×6.0×2.5mm) package, and its small size can meet the instantaneous overvoltage protection of multiple parts of the car.

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

The working principle of TVS:

When the circuit is in a stable and normal working state, the TVS device reversely cuts off and has no action. At this time, its high resistance ensures that almost no current flows through the TVS and does not affect the normal operation of the circuit. When there is an instantaneous overvoltage in the circuit that exceeds the normal operating voltage of the circuit, the TVS diode will have an avalanche, providing an ultra-low resistance path for the instantaneous current, while absorbing large currents, and clamping the voltage between its two ends to a predetermined value VC (Clamping Voltage), so as to protect the subsequent circuit from transient high-energy impact and damage. When the transient overvoltage ends, the TVS automatically restores the reverse cut-off state, so that the entire circuit enters the normal voltage.

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

Operation during a Surge

As a protection device for AC or DC voltage ports, TVS needs to follow different surge test standards for different voltage application ports, such as the IEC 61000-4-2 standard for electrostatic protection and the IEC 61000-4-5 standard for power port protection , ITU K21 standards for signal port protection, etc. However, due to the special automotive application environment of the vehicle-grade TVS, its overvoltage protection needs to follow the ISO 7637-2 standard and the ISO 16750-2 standard:

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

Car power line fluctuating voltage

In addition to the special overvoltage test standards for the automotive application environment, the automotive-grade TVS also requires the AEC-Q101 standard “AEC-Q101 Failure Mechanism Based Stress Test Qualification for Discrete Semiconductors in Automotive Applications” in terms of reliability. The test has more stringent requirements than non-automotive grade products:

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

Wei’an car-grade TVS WSxxP30SMC(-B)-AT series products have excellent resistance to transient overvoltage and excellent AEC-Q101 reliability, providing stable and reliable safety protection for automotive-grade circuit applications. At present, the voltage of this series of products covers automotive 12V power supply systems and 24V power supply systems to meet the extensive needs of automotive customers. The specifications of the product series are as follows:

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

WSxxP30SMC(-B)-AT series anti-dump capability:

Electric vehicle surge protection technology: Wei’an Auto TVS reveals the secret

Wayon is a provider of circuit protection components and power semiconductors. WAYON has always adhered to the core values ​​of “customer-oriented, technology-oriented, and hard work”. Committed to leading the market through technological innovation, and striving to become the world’s leading brand of circuit protection components and power semiconductors.

The Links:   SCE200AA160 https://www.slw-ele.com/lt084ac27500.html“> LT084AC27500

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