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MOSFET 101

Learn the basic tips and tricks to select and design with a MOSFET to get to market faster.

Additional information

Get more information on TI's MOSFET portfolio.

1. Understanding MOSFET datasheets

When it comes to MOSFET datasheets, you have to know what you’re looking for. While certain parameters are obvious and explicit (BVDSS, RDS(ON), gate charge), others can be ambiguous at best (ID, SOA curves), while others can be downright useless at times (see: switching times). In this upcoming series of blog posts, we will attempt to demystify the FET datasheet, so that a reader can easily locate and discern the most usual data for their application, without getting bogged down by superfluous information or worse yet tricked by the games different vendors play to make their devices look more appealing on paper. Read the blogs or watch the videos below!

Blogs

-Part 1: Avalanche ratings

-Part 2: Safe Operating Area (SOA)

-Part 3: Continuous Current Ratings

-Part 4: Pulsed Current Ratings

-Part 5: Switching Parameters

-Part 6: Thermal Impedance

Videos

# Title Duration
1.1 Understanding MOSFET Datasheets: Avalanche Ratings
Learn how to read Avalanche Ratings on MOSFET datasheets.
11:36
1.2 Understanding MOSFET datasheets: Safe Operating Area (SOA)
Understanding MOSFET datasheets: Safe Operating Area (SOA) what is the SOA
16:07
1.3 Understanding MOSFET datasheets: Current Ratings
Learn how to read and decipher current ratings that appear MOSFET datasheet.
20:33
1.4 Understanding MOSFET Datasheets: Switching Parameters
Learn how to read and decipher switching parameters that appear on the MOSFET datasheet.
17:05
1.5 Understanding MOSFET datasheets: Thermal Impedances
Understand thermal impedance values on the MOSFET datasheet.
12:16
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2. Selecting a MOSFET

In complicated power designs, metal-oxide semiconductor field-effect transistor (MOSFET) selection has a tendency to be somewhat of an afterthought. While it’s just a three-pin device, appearances can be deceiving and trying to select the correct MOSFET or “FET” can be a task more complicated than you might think. In this 7-part blog series, we analyze a variety of typical FET applications, from power supply to motor control, and address the various concerns and trade-offs that dictate the FET selection process. Hopefully, whether you’re a FET novice or an advanced apps engineer, you will find this series insightful the next time you have to decide on a MOSFET best suited for your system (and budget).

Blogs

Part 1: How to cross reference a FET

Part 2: Motor control

Part 3: Switch mode power supply

Part 4: Buck converter selection tool

Part 5: Load switch

Part 6: MOSFETs for battery protection

Part 7: Hot swap

# Title Duration
2.1 Load Switches vs. Discrete MOSFETs
An introductory comparison between switching solutions
02:35
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