4-channel 2.5V gate voltage MOSFET driver board, 20Vds maxDesigned by Azduino by Spence Konde in United States of America
MOSFETs are the modern go-to technology for controlling large loads from a microcontroller. As technology has advanced, and processor voltages have moved to 3.3v and below, MOSFETs have become availa…Read More…
MOSFETs are the modern go-to technology for controlling large loads from a microcontroller. As technology has advanced, and processor voltages have moved to 3.3v and below, MOSFETs have become available which will turn on with ever lower gate voltages. Unfortunately for many hobbyists, these modern low-voltage MOSFETs have often remained out of reach - while 4.5v logic level MOSFETs were made in through-hole packages, the lower voltage ones are available almost exclusively in surface mount packages. eBay and Amazon are full of 4-channel MOSFET driver boards... unfortunately these almost exclusively use old "standard" voltage MOSFETs (generally advertised for use with Arduino, despite the fact that 5V is not enough voltage to turn them on fully). It's never been clear to me why this was the case, as suitable MOSFETs are readily available, just not on assembled boards - but that's why I decided to offer this board.
This is a basic 4-channel MOSFET breakout board, made with the AOD476 2.5v logic level gate MOSFET. These support switching loads up to 20V. They are rated for Pd = 2.5W at ambient temperature of 25C without added cooling, and <79 mOhm Rds(on) with 2.5v on the gate (3.3V logic levels) and 28 mOhm Rds(on) with 4.5V on the gate (5V logic levels). In practice, these are good up to 3-5A with 3.3V logic levels drive, and 5-8A with 5V.
These are smaller, lighter duty FETs than my other MOSFET boards have; partly for that reason, they also have a lower gate charge; as a result, they can be PWM'ed with just a microcontroller output pin at speeds of 5-8kHz without issue.
For more information on MOSFETs in general, please refer to our MOSFET Guide
The PCBs used on these are an older version; once they sell out, we will begin mounting them on our new version
Sold as an ASSEMBLED BOARD - with or without screw terminals.
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