ST's power MOSFET portfolio offers a broad range of breakdown voltages from –100 to 1700 V, with low gate charge and low on-resistance, combined with state-of-the art packaging. ST's process technology for both high-voltage power MOSFETs (MDmesh™) and low-voltage power MOSFETs (STripFET) ensures an enhanced power handling capability, resulting in high-efficiency solutions. Power MOSFETs belong to the STPOWER family.
Choose the right STPOWER MOSFET for your design:
Discover our STripFET low-voltage power MOSFETs, with low gate charge and low on-resistance, combined with state-of-the art packaging.
Discover our medium-voltage STripFET N-channel power MOSFET porfolio, available in a wide range of miniature and high-power packages.
Discover our MDmesh™ N-channel Super-Junction MOSFETs, featuring standard and fast-recovery body diode.
Discover our MDmesh™ high voltage and very high voltage power MOSFETs, with enhanced power-handling capability, resulting in high-efficiency solutions.
Discover our STripFET P-channel MOSFETs, available in very small form factor packages and recently enlarged with new trench-gate devices.
The main features of our wide STPOWER MOSFET portfolio include:
- -100 to 1700 V breakdown voltage range
- More than 30 package options including the 4-lead TO-247 featuring a dedicated control pin for increased switching efficiency, the H2PAK for high-current capability, the very innovative surface-mount leadless TO-LL, the 1-mm-high surface-mount PowerFLAT family, from 2 x 2 mm up to 8 x 8 mm for medium-voltage, high-voltage and very-high-voltage power MOSFETs featuring excellent thermal performance thanks to a large exposed metal drain pad
- Improved gate charge and lower on-state resistance to meet today's challenging efficiency requirements
- Intrinsic fast body diode option for selected product lines
- Wide portfolio of automotive-grade power MOSFETs
- Application-oriented technologies
In any voltage range and for both industrial and automotive applications such as switch mode power supplies (SMPS), lighting, motor control, energy generation and electro mobility, chassis & safety, body & convenience, ST has the right power MOSFET for your design.
Our wide STPOWER product portfolio combined with state-of-the art packaging and protections for high reliability and safety helps designers find the right solutions for customized, high-efficiency applications that will last a long lifetime.
Tutorial video: Learn how to read and understand power MOSFET dynamic parameters in datasheets.
Tutorial video: Learn how to read und understand power MOSFET basic parameters in datasheets.
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Power MOSFET Basics
MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor. It's a voltage controlled device with 3 terminals:
- Gate (electrically insulated from the semiconductor)
When a voltage applied between the Gate and the Source reaches a certain threshold (VGS(th) or threshold G-S voltage), the device is able to support current conduction between the Drain and the Source (ID or drain current).
When a voltage applied between the Gate and the Source is below VGS(th), the device will withstand a voltage up to BVDSS (or breakdown voltage).
MOSFETs can be used as a signal amplifier (linear operation) or as a switch in power applications.
Like many other types of semiconductor power switches, the main parameters of a MOSFET, usually available in most datasheets, are:
- RDS(on) (on-state resistance): electrical resistance when the device is set in on state. The lower is RDS(on), the lower is the conduction loss due to power dissipation when the current is flowing.
- BVDSS (breakdown voltage): maximum drain-to-source voltage that the device is able to sustain when in off state.
- QG (total gate charge): amount of electric charge required to the gate driver to turn on/off the device itself. QG impacts directly the efficiency (the lower, the better).
The product of RDS(on) and QG is known as the MOSFET Figure of Merit (FOM).
Other important parameters are intrinsic capacitances that can affect the switching times and voltage spikes, and body drain diode when device is used as power diode, like in synchronous free-wheeling operation mode.
Learn more about how to read MOSFET datasheet parameters thanks to our series of videos dedicated to "Power MOSFET datasheet parameters".
Main types of power MOSFETs
MOSFETs can be of different types, including:
- Depletion Mode: Normally ON. Applying the VGS would turn it OFF.
- Enhancement Mode: Normally OFF. Applying the VGS would turn it ON.
- N-channel MOSFETs: positive voltages and currents.
- P-channel MOSFETs: negative voltages and currents.
- Low voltage MOSFETs: BVDSS from 0 V to 200 V.
- High voltage MOSFETs: BVDSS greather than 200 V.
N-channel enhancement-mode MOSFETs are the most popular type used in power switching circuits because of their low RDS(on) (on-state resistance) compared to P-channel MOSFETs.
Power MOSFET Applications
Power MOSFETs play an important role in all applications handling Power.
The main applications of high voltage MOSFETs include:
- Switch Mode Power Supplies (SMPS)
- Residential, commercial, architectural and street lighting
- DC-DC converters
- Motor control
- Automotive applications
ST's high voltage MOSFET portfolio offers a broad range of breakdown voltages up to 1700 V, with low gate charge and low on-resistance, combined with state-of-the-art packaging. ST's MDmesh™ high-voltage MOSFETs technology has enhanced power-handling capability, resulting in high-efficiency solutions.
The main applications of low voltage MOSFETs include:
- Switch, buck and synchronous rectification
- Uninterruptible Power Supplies (UPS)
- Small motor control
- Switch Mode Power Supplies (SMPS)
- Power-Over-Ethernet (PoE)
- Solar inverters
- Automotive applications
ST's low voltage MOSFET portfolio offers a broad range of breakdown voltages from -100 V to 120 V, with low gate charge and low on-resistance, combined with state-of-the art packaging.