Introduction
Power MOSFETs are the crucial "switches" controlling energy flow in modern electronic devices. For a long time, international brands like onsemi have dominated the market with their classic products, such as the FDS4675. However, global supply chain volatility and the need for technological autonomy have made seeking reliable, high-performance domestic alternatives a strategic necessity. Represented by VBsemi's VBA2412, domestic components are now achieving direct benchmarking and even surpassing international classics.
Part 1: Analysis of the Classic Component
onsemi's FDS4675 is a P-channel MOSFET with a drain-source voltage of 40V and a continuous drain current of 11A. It utilizes advanced PowerTrench technology with a rugged gate version, optimized for power management applications requiring a wide gate drive voltage range (4.5V to 20V). Its on-resistance is 17mΩ at 4.5V, providing efficient performance in various circuits such as DC-DC converters and load switches, making it a standard choice for many designs.
Part 2: Performance Surpassing by the Domestic Challenger
VBsemi's VBA2412 directly benchmarks the FDS4675 and offers improvements in key parameters:
Higher Current Capability: Continuous drain current reaches -16.1A (an increase of approximately 5A), enabling greater power handling and load capacity.
Lower Conduction Loss: On-resistance at 10V is 10mΩ, significantly lower than the FDS4675's 17mΩ at 4.5V, reducing conduction losses and improving system efficiency.
Robust Voltage Ratings: Drain-source voltage is -40V, matching the voltage withstand capability, with a gate-source voltage of ±20V for flexible drive compatibility.
The device is based on Trench technology in a compact SOP8 package, ensuring stable and reliable performance for easy integration.
Part 3: Core Value Beyond Specifications
Choosing a domestic alternative brings deeper advantages:
Ensuring Supply Chain Security: Reduces dependence on international supply chains, enhancing supply stability and production continuity.
Optimizing Overall Cost: Offers better cost competitiveness with equivalent or superior performance, potentially simplifying peripheral designs like thermal management.
Accessing Rapid Local Support: Domestic suppliers provide agile technical support and joint development tailored to specific application scenarios.
Boosting the Industrial Ecosystem: Every successful application fuels experience accumulation and technology iteration in the domestic semiconductor industry, creating a virtuous development cycle.
Part 4: A Robust Path for Substitution Implementation
For a smooth transition, the following steps are recommended:
Detailed Specification Comparison: Carefully compare all key electrical parameters and characteristic curves, including threshold voltage and dynamic performance.
Rigorous Laboratory Testing: Conduct static parameter tests, dynamic switching tests, temperature rise/efficiency tests, and reliability stress tests under real-world conditions.
Small-Batch Pilot Verification: Trial the component in actual products and environments, monitoring long-term performance and compatibility.
Develop a Switchover and Backup Plan: Implement the substitution gradually after verification, while keeping the original design as a short-term backup to mitigate risks.
Conclusion: Moving from "Usable" to "Excellent"
The evolution from the FDS4675 to the VBA2412 demonstrates that domestic power semiconductors now possess the capability to compete with and even surpass international classics in key aspects. Adopting such high-performance domestic components is not only a pragmatic choice to address current supply chain challenges but also a strategic move to build an autonomous, resilient, and innovative industrial ecosystem for the future. Now is the opportune time to actively evaluate and introduce high-quality domestic solutions.