In modern power design, achieving high efficiency and power density requires MOSFETs that excel in both conduction and switching performance. This selection is a critical balance between current handling, switching speed, thermal management, and cost. This article uses two prominent MOSFETs—AON6290 (high-current) and AON7264E (compact medium-power)—as benchmarks. We will analyze their design cores, application scenarios, and compare them with domestic alternative solutions VBGQA1105 and VBQF1615. By clarifying parameter differences and performance orientations, we provide a clear selection map to help you find the optimal power switching solution.
Comparative Analysis: AON6290 (N-channel) vs. VBGQA1105
Analysis of the Original Model (AON6290) Core:
This is a 100V N-channel MOSFET from AOS, housed in a PDFN-8 (5x6) package. Its design core is to deliver high-efficiency, high-frequency switching for demanding power applications. Key advantages include an extremely low on-resistance of 4.6mΩ at 10V gate drive and a high continuous drain current rating of 85A. Utilizing trench MOSFET technology, it is uniquely optimized to minimize both conduction losses (via low RDS(on)) and switching losses (via low input Ciss and output Coss capacitances).
Compatibility and Differences of the Domestic Alternative (VBGQA1105):
VBsemi's VBGQA1105 offers a direct pin-to-pin compatible alternative in a similar DFN8(5x6) package. The key parameters are closely matched: both are 100V, Single-N-channel devices. The VBGQA1105 features a slightly higher on-resistance of 5.6mΩ (@10V) but boasts a higher continuous current rating of 105A, leveraging SGT (Shielded Gate Trench) technology for robust performance.
Key Application Areas:
Original Model AON6290: Ideal for high-current, high-frequency switching applications where minimizing losses is paramount.
Boost Converters & Synchronous Rectifiers in consumer electronics, telecom, and industrial power supplies.
High-power LED backlight drivers.
High-efficiency DC-DC converters requiring superior thermal performance from the PDFN package.
Alternative Model VBGQA1105: A strong alternative for applications requiring similar voltage ratings and potentially higher current margins. Its SGT technology offers a good balance of low RDS(on) and high current capability, suitable for upgrades or designs seeking supply chain diversification in the same application spaces as AON6290.
Comparative Analysis: AON7264E (N-channel) vs. VBQF1615
This comparison focuses on compact, medium-power N-channel MOSFETs where board space and efficiency in lower voltage systems are critical.
Analysis of the Original Model (AON7264E) Core:
The AON7264E from AOS is a 60V N-channel MOSFET in a compact DFN-8 (3x3) package. Its design pursues a balance of respectable current handling (28A continuous) and low on-resistance (13.3mΩ @4.5V) within a minimal footprint. This makes it an excellent choice for space-constrained applications that still require efficient power switching.
Compatibility and Differences of the Domestic Alternative (VBQF1615):
VBsemi's VBQF1615 is a direct pin-to-pin compatible alternative in the same DFN8(3x3) package. It matches the 60V voltage rating closely. Its key parameters show a very competitive profile: an on-resistance of 13mΩ at 4.5V (matching the original's performance at this common drive voltage) and 10mΩ at 10V, with a continuous current rating of 15A. It utilizes Trench technology for reliable switching performance.
Key Application Areas:
Original Model AON7264E: Perfect for compact circuits requiring efficient power management at moderate current levels.
Power management modules in portable devices, drones, or IoT hardware.
Low-side switches in synchronous buck converters for 12V-24V systems.
Motor drive circuits for small brushed DC or stepper motors.
Alternative Model VBQF1615: Serves as a highly viable alternative for applications where the 60V rating and compact DFN3x3 footprint are primary drivers. Its closely matched RDS(on) at 4.5V makes it suitable for direct replacement in many scenarios, such as battery-powered device power paths or compact DC-DC conversion, offering a resilient supply chain option.
Summary
This analysis reveals two distinct selection paradigms:
For high-current, high-voltage (100V) switching applications, the original AON6290 sets a high standard with its ultra-low 4.6mΩ RDS(on) and 85A current capability, making it a top-tier choice for demanding telecom/industrial converters. The domestic alternative VBGQA1105 provides a compelling compatible option with a higher 105A current rating and slightly higher RDS(on), suitable for designs prioritizing current headroom or supply chain diversification.
For compact, medium-power (60V) switching, the original AON7264E offers an excellent balance of 28A current and low RDS(on) in a tiny 3x3mm package, ideal for space-constrained designs. The domestic alternative VBQF1615 presents a closely matched performance profile in the same footprint, with a competitive RDS(on) of 13mΩ @4.5V, serving as a reliable alternative for compact power management and motor drive applications.
The core conclusion is that selection hinges on precise requirement matching. In the context of supply chain diversification, domestic alternatives like VBGQA1105 and VBQF1615 not only provide viable backup options but also offer competitive or enhanced parameters in key areas, giving engineers greater flexibility and resilience in design trade-offs and cost control. Understanding the specific performance profile of each device is key to unlocking its full potential in your circuit.