In modern power design, selecting the optimal MOSFET involves balancing performance, size, cost, and supply chain stability. This article takes two representative MOSFETs—PMPB12R7EPX (P-channel) and BUK9628-100A,118 (N-channel)—as benchmarks, analyzes their design cores and application scenarios, and evaluates two domestic alternative solutions: VBQG2317 and VBL1102N. By clarifying parameter differences and performance orientations, we provide a clear selection map to help you find the most suitable power switching solution.
Comparative Analysis: PMPB12R7EPX (P-channel) vs. VBQG2317
Analysis of the Original Model (PMPB12R7EPX) Core:
This is a 30V P-channel MOSFET from Nexperia, in a compact DFN2020M-6 package. Its design focuses on efficient power management in minimal space. Key advantages: low on-resistance of 15.5mΩ at 10V gate drive, continuous drain current up to 12.3A, and trench MOSFET technology for enhanced performance.
Compatibility and Differences of the Domestic Alternative (VBQG2317):
VBsemi’s VBQG2317 offers a pin-to-pin compatible DFN6(2x2) package. Key differences: VBQG2317 has a similar -30V voltage rating but a lower continuous current (-10A) and slightly higher on-resistance (17mΩ@10V) compared to the original.
Key Application Areas:
- Original Model PMPB12R7EPX: Ideal for space-constrained 30V systems requiring moderate current switching, such as load switches in portable devices, power path management in battery-powered applications, or high-side switches in DC-DC converters.
- Alternative Model VBQG2317: Suitable for P-channel applications needing higher voltage margin but with current demands within 10A, such as power management circuits with voltage robustness requirements.
Comparative Analysis: BUK9628-100A,118 (N-channel) vs. VBL1102N
Analysis of the Original Model (BUK9628-100A,118) Core:
This N-channel MOSFET from Nexperia in a D2PAK package targets high-power applications. Its core strengths include a high voltage rating of 100V, continuous drain current of 49A, and low on-resistance of 17mΩ at 10V, making it efficient for high-current switching with good thermal performance.
Compatibility and Differences of the Domestic Alternative (VBL1102N):
VBsemi’s VBL1102N in a TO263 package is a robust alternative. It matches the 100V voltage rating and offers a higher continuous current of 70A with a comparable on-resistance of 20mΩ@10V, providing enhanced current handling and lower conduction losses in similar applications.
Key Application Areas:
- Original Model BUK9628-100A,118: Excellent for high-power DC-DC conversion, motor drives, or power supplies in 48V-100V systems, such as industrial equipment, automotive applications, or server power modules.
- Alternative Model VBL1102N: Ideal for upgraded scenarios demanding higher current capability (up to 70A) and improved efficiency, such as high-current DC-DC converters, motor drives, or power stages where reduced loss and thermal performance are critical.
Conclusion:
This analysis highlights two selection paths:
- For P-channel applications in compact designs, PMPB12R7EPX offers a balance of low on-resistance and moderate current in a small footprint, while VBQG2317 provides a compatible alternative with voltage margin for lower-current needs.
- For N-channel high-power applications, BUK9628-100A,118 delivers reliable performance with 100V and 49A capability, whereas VBL1102N enhances current handling to 70A for demanding, efficiency-focused upgrades.
The core insight: Selection depends on precise requirement matching. Domestic alternatives like VBQG2317 and VBL1102N not only offer supply chain resilience but also competitive or enhanced parameters, giving engineers flexible options for design trade-offs and cost optimization. Understanding each device’s design philosophy and parameters is key to maximizing circuit performance.