I. Introduction

Amidst the automotive industry's rapid evolution towards intelligence, electrification, and networking, the conventional 12V electrical system struggles to keep pace with escalating power demands across diverse applications such as commercial vehicles, industrial equipment, robots, and aircraft. To address this, the industry is progressively shifting towards 24V and even 48V systems. In this context, Wenxianwei Microelectronics Co., Ltd. has introduced the WST6 series of intelligent high-side switch chips, tailored specifically for 24V electronic control platforms with compatibility for 48V extensions. These chips offer customers high-performance, high-reliability solutions.

II. Product Series Introduction

1. Product Overview

The Wenxianwei WST6 series comprises intelligent high-side switch chips designed exclusively for 24V electronic control platforms. Utilizing a single-chip design, they integrate drive, MOSFET, current detection, thermal protection, voltage protection, EMC, and various diagnostic functions. The series includes single-channel, dual-channel, and four-channel configurations, with on-resistance ranging from 10mΩ to 140mΩ. The chips are available in DFN9×6-14L packages compatible with the BTT full series and SOP20L packages compatible with the BTS series, facilitating seamless replacements.

2. Product Specifications

· Single-chip design: Offers higher reliability and better performance compared to multi-chip packages.

· Channel configuration: Single-channel, dual-channel, and four-channel to cater to different application scenarios.

· On-resistance: Ranges from 10mΩ to 140mΩ, providing multiple options to optimize system energy efficiency.

· Package types: DFN9×6-14L and SOP20L, with strong compatibility and easy integration.

· Research and development background: Addresses the limitations of traditional 12V systems, leveraging technological innovation to meet the demands of modern automotive electrical systems for high power density, high reliability, and intelligent control.

III. Technical Features and Advantages

1. 2% High-Precision Current Detection

The WST6 series employs globally advanced patented technology, achieving current detection accuracy within 2%, meeting OEM requirements without calibration. This technology enhances system precision and reliability, enabling real-time monitoring of load status to optimize system control strategies and improve overall performance.

2. Enhanced Avalanche Demagnetization Tolerance

With an avalanche demagnetization tolerance approximately 20% higher than competitors, the WST6 series is ideal for high-reliability applications such as electric vehicles, industrial motor drives, renewable energy power generation, energy storage systems, and high-frequency switching power supplies. It effectively protects the circuit against transient overvoltage, overcurrent surges, and high dynamic loads, ensuring stable system operation.

3. Low-Power Standby Mode

The WST6 series innovatively introduces a low-power standby mode specifically designed for parking scenarios. In this mode, the vehicle's parking power consumption is only about one fortieth of that of competitors, significantly reducing energy consumption during prolonged parking and extending battery life. This feature is particularly suitable for younger drivers accustomed to long-term travel, business trips, or tourism, ensuring sufficient battery power upon restart.

4. Short-Circuit Protection and Reliability

For applications like pumps and valves, the WST6 series offers short-circuit latch, short-circuit restart, and adjustable short-circuit current limiting functions, with short-circuit reliability about 20% higher than competitors. This enhances system safety and reduces downtime due to short-circuit faults, improving overall system reliability.

5. Improved High-Temperature Ron Characteristic Attenuation

The WST6 series exhibits approximately 50% better high-temperature Ron characteristic attenuation performance than competitors, offering lower Ron and stronger load-carrying capacity in extreme high-temperature scenarios. This allows the series to maintain stable electrical performance and extend chip lifespan in high-temperature environments, making it ideal for applications with high temperature performance requirements, such as in automobiles, industry, and aerospace.

6. Other Technical Highlights

• Supports EMC: Optimizes electromagnetic compatibility, reduces electromagnetic interference, and enhances system stability.
• Thermal and Voltage Protection: Built-in multiple protection mechanisms to safeguard the chip under abnormal conditions.

IV. Product Application Scenarios

1. Automotive Industry

The WST6 series finds widespread use in commercial vehicles and construction machinery, including heavy trucks, medium trucks, light trucks, passenger vehicles, special vehicles, lifting machinery, mining machinery, excavation machinery, road machinery, shovel machinery, concrete machinery, material handling, pile driving machinery, aerial work machinery, sanitation machinery, emergency rescue equipment, and agricultural machinery. It covers various scenarios such as automotive interior lights, headlights and taillights, seat and steering wheel heating, door locks, motors, power distribution systems, chassis control, proportional valves, and solenoid valve control. Its high-precision current detection and short-circuit protection functions effectively enhance the reliability and safety of automotive electrical systems, supporting autonomous driving functions and advanced driver assistance systems (ADAS), providing robust support for the intelligent development of future automobiles.

2. Intelligent Embodied Robots

In the realm of intelligent embodied robots, the WST6 series chips are utilized in robot battery safety management systems and power distribution systems. As the core component of intelligent power distribution systems, high-side drives efficiently distribute power to various key components (such as motors, sensors, controllers, etc.) and dynamically adjust output power based on the robot's operating status, achieving efficient energy utilization. Additionally, the high-side drives of the WST6 series feature short-circuit protection. During robot operation, if faults such as circuit short-circuits occur, the high-side drives can quickly detect abnormal currents and immediately cut off power, preventing fault expansion and effectively protecting the robot's circuit systems and hardware equipment, ensuring stable and safe operation in complex environments.

3. Low-Altitude Aircraft

The WST6 series is suitable for low-altitude aircraft such as drones and electric vertical take-off and landing (eVTOL) aircraft. Its lightweight design and high-temperature performance advantages effectively enhance the aircraft's energy efficiency and reliability, supporting long-duration, high-load flight missions.

4. Industrial Motor Drives

In the field of industrial motor drives, the high avalanche tolerance and high dynamic load performance of the WST6 series enable it to cope with complex industrial environments, optimizing motor control efficiency, reducing energy consumption, and improving overall system performance.

5. Renewable Energy Power Generation

The WST6 series can be used in photovoltaic inverters and energy storage systems. Its high avalanche tolerance and high-temperature performance advantages effectively handle extreme operating conditions, ensuring stable system operation and improving the utilization efficiency of renewable energy.

V. Advantages of 24V Electronic Control Platforms

1. Efficient Energy Saving

Compared to traditional 12V systems, 24V electronic control platforms offer higher power density while reducing current loss. Under high power demand, 24V systems require less current, thereby reducing wire harness diameter and weight, decreasing energy loss, and significantly improving system energy efficiency.

2. Enhanced Compatibility

24V electronic control platforms support a wide range of electrical equipment and are compatible with multiple expansion modules. This high level of compatibility simplifies system design, reduces development costs, and enhances system flexibility and scalability.

3. Functional Safety

24V electronic control platforms adhere to automotive functional safety standards (such as ASIL-C), ensuring system reliability and safety. The WST6 series, with its built-in multiple protection mechanisms and diagnostic functions, can monitor system status in real-time, promptly detect and handle potential faults, ensuring the safe operation of vehicles and equipment.

4. Intelligent Control

24V electronic control platforms support the AUTOSAR architecture, facilitating software upgrades and functional expansions. The intelligent design of the WST6 series enables seamless integration with modern automotive electronic control systems, supporting autonomous driving functions and advanced driver assistance systems (ADAS), providing powerful technical support for the intelligent development of future automobiles.

5. Improved Vehicle Performance

By optimizing the electrical system, 24V electronic control platforms reduce energy loss and enhance overall vehicle performance. The high-precision current detection and low-power standby mode of the WST6 series further optimize system energy efficiency, enhancing vehicle range and dynamic response performance.

VI. Market Prospects

1. Market Demand Analysis

With the rapid development of the automotive industry towards intelligence, electrification, and networking, the market demand for 24V electronic control platforms is growing rapidly. It is anticipated that the global market for 24V electronic control platforms will experience significant growth in the coming years, with major application areas including automobiles, industry, robots, and low-altitude aircraft.

2. Competitive Advantages

The WST6 series products, with their patented technology, excellent performance, and cost-effectiveness, hold significant competitive advantages in the 24V electronic control platform market. Features such as high-precision current detection, high avalanche tolerance, low-power standby mode, and high-temperature performance attenuation cater to customers' demands for high performance and high reliability.

3. Cooperation Opportunities

Wenxianwei invites customer partners to explore cooperation opportunities. Through technical cooperation, marketing promotion, and joint development, we aim to propel the development of 24V and 48V electronic control platforms, achieving mutual benefit and win-win results. We provide customized solutions to meet the needs of different customers and create greater value through continuous technological innovation and product upgrades.

4. Future Development Plans

Wenxianwei is committed to deepening its presence in the 24V and 48V electronic control platform fields, increasing R&D investment, and continuously launching higher-performance, more intelligent products. We aspire to become a global leader in automotive electronic control solutions, driving the automotive industry towards intelligence, electrification, and sustainable development.

Data source for this article: Internal test data

Disclaimer: The market is risky, and choices should be made with caution! This article is for reference only and not as a basis for trading.