[DigiKey TechForum] N-Channel and P-Channel MOSFETs
TECHWORLD ·
✦ AI Summary
MOSFETs are a representative semiconductor technology that has advanced year by year, and they are used in power supply applications.
Vishay's SI7938DP-T1-GE3 dual MOSFET is slightly larger than a typical SO-8 package 555 timer, and its maximum rating is 60A and 40 VDC.
A look at the number of products DigiKey carries shows that N-channel devices far outnumber P-channel devices, indicating a strong preference for N-channel devices, though P-channel devices may be more suitable depending on the circuit.
MOSFETs are a representative semiconductor technology that has advanced year by year.
Applications for MOSFETs include power supply uses such as chargers and computer power supplies.
One example is Vishay's SI7938DP-T1-GE3 dual MOSFET.
The SI7938DP-T1-GE3 is slightly larger than a typical SO-8 package 555 timer.
The SI7938DP-T1-GE3 has a maximum rating of 60A and 40 VDC.
The question was selected from among those posted on DigiKey's social media feed.
P-channel MOSFETs also exist, but in actual use, N-channel MOSFETs account for the majority. Of the single MOSFETs DigiKey carries, there are 18,204 N-channel types and 3,757 P-channel types.
Of the 166 total 50-100A MOSFET arrays, only 4 products include P-channel devices. These 4 also include dual-package products with both N-channel and P-channel devices.
Gate drivers show a similar trend. There are 1,464 gate drivers for N-channel devices, compared with 9 for P-channel devices.
These figures indicate a strong preference for N-channel MOSFETs. Comparing the number of products in 50-100A MOSFET arrays and gate drivers shows that P-channel-related products are very few, confirming a selection trend centered on N-channel devices.
However, the requirements of each circuit differ. Depending on the situation, a P-channel MOSFET may be the more suitable choice.
Overall, N-channel MOSFETs are used more because they are advantageous in terms of system cost and performance. MOSFET performance is generally evaluated based on factors such as on-resistance, maximum drain-source voltage, drain current, switching speed, including turn-on and turn-off time, and thermal dissipation performance.
In circuit design, it is necessary to consider not only the characteristics of the device itself but also ancillary factors such as the cost and complexity of the driver circuit.
In this regard, a useful reference for the basics of MOSFET drivers is the Arduino-controlled H-bridge-based DC motor drive article.
At the end of the article, the author also mentioned the MOSFETs they prefer.
The favorite product cited was the 2N7000/2N7002 logic-level switch.
Among them, the 2N7000 was introduced as a widely used general-purpose component and described as a component that is about 50 years old.
Its original introduction name was MOSPOWER FETlington, and the term FETlington was explained as a play on words emphasizing the possibility that a MOSFET could replace a Darlington transistor.
The author asked readers to share why they made that choice in a P-channel MOSFET selection design example, and also asked them to leave their preferred MOSFETs in the comments.
The provided text is not part of the article body but an indication of the original source location, and the only extractable fact is that the original reference is DigiKey's TechForum/Article.
Source: TECHWORLD · Lee Gwang-jae
Original: https://www.epnc.co.kr/news/articleView.html?idxno=407124
References
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Source: TECHWORLD
View originalThis article was summarized and organized by BizCrush based on the original article from TECHWORLD. For exact quotations and full details, please refer to the original article.