Wenxianwei released the WS7 series of intelligent high-side switches for automotive driver chips

In recent years, new energy vehicles have developed rapidly, and the wave of car use has spread across the world. my country's new energy vehicle market share has ranked first in the world for nine consecutive years, and its market share in 2023 will reach 37.7%. The market size is considerable, and it has the following characteristics: electric vehicle products have obvious advantages over gasoline vehicles, high consumer acceptance, huge market size, and considerable development potential. With the development of electrification and autonomous driving technology, the automotive semiconductor industry has also set off a revolution. The importance of semiconductors to automobiles is increasing day by day, and the superposition of body functions has also prompted the industry to turn its attention to the development of highly integrated chip products. Due to the increase in the penetration rate of new energy vehicles, the reduction of maintenance costs, and the high degree of matching with market demand, high-side switches (high-side drivers) have become the product application direction of intelligent and electronically controlled electric vehicles.

Based on market demand, Shenzhen Wenxian Microelectronics Co., Ltd. (hereinafter referred to as "Wenxianwei") has launched a new automotive driver chip - the smart high-side switch WS7 series, with a total of 9 products: single-channel high-side switch chip WS type, dual-channel high-side switch chip WSD type and quad-channel high-side switch chip WSQ type. The products launched this time have excellent over-temperature, over-current, under-voltage protection and other performance, meeting the needs for higher safety and stability during automobile use.

High-side switch WS7 series solves traditional weaknesses and achieves upgrade and replacement

The new Wenxian micro high-side switch solves the problems of insufficient flexibility, high power consumption and easy EMC interference brought by traditional fuses and relays. In complex automotive electronic systems, it can not only drive and shut down the load, but also achieve multi-functional, higher degree of protection and diagnosis of the load. It has obvious advantages in the three major aspects of electric wire heating, power transmission and power transmission.

The WS7 series of high-side switches abandon the traditional single-wire connection between the automotive module and the battery, greatly saving the automotive wiring harness between the two, reducing the occupation of invalid space, thereby reducing the weight of the vehicle body and reducing the occurrence of failures. In terms of driving safety, the high-side switch can assist the central controller of the vehicle to control the operating status of each module in real time, avoiding the risk of each module being interfered by the electrical environment. The product also shares protection and filtering modules between modules, providing stable and safe energy, and "escorting" the signal transmission between each line. Therefore, high safety and reliability are the core advantages of the product, helping new energy vehicles to upgrade to lightweight, high intelligence, and high safety.

With the upgrade of the three major development directions of new energy vehicles, the number of high-side driver products applied to automobiles is increasing, and the integration, reliability and performance of products are becoming increasingly stringent. The single-channel, dual-channel and quad-channel products released by Wenxianwei can meet the R&D needs of automobile companies. At the same time, we will continue to iterate products and innovate functions, make progress together with the majority of automobile business partners, and create a new era of smart cars with pioneering significance.

Product introduction of WS7 series of smart high-side switches

Wenxian Micro High-Side Switch Product Roadmap

The WS7 series of smart high-side switches from Wenxianwei can control, diagnose and protect the car through different numbers of channels, drive the ground load application of 12V cars, and play advanced protection and diagnosis functions, including overheat shutdown protection with configurable latching function, dynamic over-temperature protection, load overcurrent protection, high-precision proportional load current detection, output overload and short-circuit alarm to ground, and VCC short-circuit diagnosis and OFF state open-circuit diagnosis. The entire series of smart high-side switches can be used to drive various resistive, inductive and capacitive loads in the body control domain, covering a variety of application scenarios such as interior lights, head and tail lights, seat and steering wheel and rearview mirror heating, solenoid valves, door locks, motors, etc.

Selection and key parameters

Single channel high side switch chip WS type:

Dual channel high side switch chip WSD type:

Four-channel high-side switch chip WSQ type:

Wenxianwei takes advantage of the upstream and downstream integration of the industrial chain, masters advanced vertical BCD process platforms, planar BCD process platforms, UHV process platforms and SGT power device platforms, possesses rich digital-analog hybrid design capabilities and advanced packaging design capabilities, and launches high-power, high-performance, and high-stability energy chain protection chip solutions. Its products cover the fields of automotive electronics, industrial power supplies, and high-end consumer electronics. In 2021, the Wuxi Automotive Electronics Innovation Center was established, and a high-level automotive chip R&D team was formed to serve 16 leading Tier 1 and 19 well-known car companies, which has won unanimous praise from customers.