In power design, balancing high-voltage capability, efficient switching, and space constraints requires careful MOSFET selection. This analysis uses two distinct MOSFETs—the high-voltage AOTF380A60L (N-channel) and the compact dual N-channel AO8810—as benchmarks. We will evaluate their domestic alternatives, VBMB16R11S and VBC6N2022, comparing key parameters and performance to guide your choice for robust and efficient power switching solutions.
Comparative Analysis: AOTF380A60L (N-channel) vs. VBMB16R11S
Analysis of the Original Model (AOTF380A60L) Core:
This is a 600V N-channel MOSFET from AOS in a TO-220F package. It is designed for high-voltage switching with a focus on reliable performance. Its key advantages are: a high drain-source voltage (Vdss) of 600V, a continuous drain current (Id) of 11A, and an on-resistance (RDS(on)) of 380mΩ at 10V gate drive. This makes it suitable for applications requiring robust voltage blocking and moderate current handling.
Compatibility and Differences of the Domestic Alternative (VBMB16R11S):
VBsemi's VBMB16R11S is a direct pin-to-pin compatible alternative in the TO220F package. It matches the original model's core specifications: a 600V voltage rating, 11A continuous current, and an identical on-resistance of 380mΩ at 10V. It utilizes a SJ_Multi-EPI process, aiming to provide equivalent high-voltage switching performance.
Key Application Areas:
Original Model AOTF380A60L: Ideal for high-voltage, medium-power applications such as:
Switch Mode Power Supplies (SMPS): PFC stages, flyback, or forward converters.
Motor drives: Inverters for appliances or industrial controls.
Lighting: Ballasts and LED driver circuits.
Alternative Model VBMB16R11S: Serves as a reliable domestic substitute for the above 600V application scenarios, offering a compatible solution for power supplies and motor drives requiring voltage ratings up to 600V.
Comparative Analysis: AO8810 (Dual N-channel) vs. VBC6N2022
This comparison focuses on a compact, dual N-channel MOSFET designed for space-constrained, low-voltage applications.
Analysis of the Original Model (AO8810) Core:
The AO8810 from AOS is a dual N-channel MOSFET in a TSSOP-8 package. Its design pursues low on-resistance and efficient operation in minimal board space. Key features include: a 20V drain-source voltage, a very low on-resistance of 20mΩ at 4.5V gate drive, a threshold voltage (Vgs(th)) of 1.1V, and a continuous drain current of 7A per channel. Its common-drain configuration is useful for synchronous rectification in compact DC-DC converters.
Compatibility and Differences of the Domestic Alternative (VBC6N2022):
VBsemi's VBC6N2022 is a pin-to-pin compatible dual N-channel alternative in a TSSOP8 package. It offers similar voltage (20V) and a comparable on-resistance of 22mΩ at 4.5V. Its threshold voltage range is 0.5–1.5V. While its rated continuous current is slightly lower at 6.6A, it provides a viable alternative with trench technology for efficient switching performance.
Key Application Areas:
Original Model AO8810: Excellent for high-density, low-voltage power management:
Synchronous rectification in low-voltage DC-DC converters (e.g., point-of-load for processors).
Load switching and power distribution in portable devices, laptops, and SSDs.
Battery management system (BMS) circuits.
Alternative Model VBC6N2022: A suitable domestic alternative for space-constrained designs requiring dual N-channel switches, such as compact power modules and portable electronics where a 20V rating and low RDS(on) are critical.
Conclusion:
This analysis outlines two clear substitution paths:
1. For high-voltage (600V) switching needs, the original AOTF380A60L and its domestic alternative VBMB16R11S offer matched performance in voltage, current, and on-resistance, making VBMB16R11S a strong, compatible replacement for SMPS and motor drive applications.
2. For compact, dual N-channel applications, the original AO8810 excels with its very low 20mΩ RDS(on) in a TSSOP-8 package. The domestic VBC6N2022 provides a compatible alternative with slightly adjusted current rating, suitable for designers seeking a supply chain alternative for space-efficient DC-DC conversion and load switching.
The core takeaway is precise requirement matching. Domestic alternatives like VBMB16R11S and VBC6N2022 provide not only viable backups but also enhance supply chain resilience, offering engineers practical options in their design and cost optimization efforts.