N-type Mosfet as switch

[APDahlen]

Hello @esteban.montes,

You may be interested in this article. It provides some of the background describing why MOSFETs are difficult to drive. In your case, it sounds like your MOSFET is entering a high channel resistance condition causing high I^2R losses. You may have better performance using one of the MOSFETS mentioned in the article.

Please let us know if you were successful.

Best wishes,

APDahlen

Guide to Selecting and Controlling a MOSFET for 3.3 VDC Logic Applications

Guide to Selecting and Controlling a MOSFET for 3.3 VDC Logic Applications It is common knowledge that MOSFETs provide an easy-to-use solution for controlling digital loads. In theory, a microcontroller can turn on a MOSFET by directly applying voltage to the MOSFET’s gate terminal. In practice, things are not so simple, especially if we use 3.3 VDC logic. The MOSFET is a voltage-controlled device where the gate voltage determines the conductivity. Classic MOSFETs such as the IRF520 require a …