Choosing the right MOSFET N transistor to control LED lighting via the Wemos D1 Mini

Hi,

I am building a LED lighting controller (2 strips with white LEDs - each 3m long, 1 RGB strip - 5m long). So I need to control 5 channels. All strips are controlled by 24 VDC. I want to control the transistor directly from the uC pin, without a bipolar transistor between the uC output and the MOSFET.

I am looking for a proven MOSFET with an N channel, which will give me a full opening at around 3.3 V. More precise assumptions:

1) Vgs - as low as possible, preferably 1.2 - 1.5 V
2) Source-drain current >= 5 A
3) SMD DPAK housing (so that heat is well dissipated on the PCB)
4) Switching frequency: > 500 Hz

Can you recommend me a proven transistor model for this purpose? I did tests on an IFR220 (Vgs: 2 - 4 V) and at ~3.3 V it does not open fully. Only a voltage of 5 V causes the diodes to light up with full power.

Thanks in advance for the hint.

You need a "logic level" MOSFET. The IFR220 is not such a one. Take a look, for example, at the datasheet of BUK98150 https://eu.mouser.com/datasheet/2/916/BUK98150_55A-1384687.pdf It looks like a better fit.
Here you have various MOSFETs of this type: https://eu.mouser.com/c/semiconductors/discre...onductors/transistors/mosfet/?q=logic%20level

Thank you for your reply. It seems ok, only the SOT223 housing rather heralds worse heat dissipation than DPAK.

I found the RFD14N05LSM DPAK transistor , here is a link to the documentation: https://pdf1.alldatasheet.com/datasheet-pdf/view/54423/FAIRCHILD/RFD14N05LSM.html - is Logic Level, Vgs (1-2).

It is available on Allegro.

Could I ask for possible confirmation that this model will work for me? Thanks in advance.

This interests you more than Vgs(th):

At about 3V you should have about 7A current enough.
These transistors are probably already discontinued from the range, so keep this in mind when choosing them.
See also this one: https://eu.mouser.com/datasheet/2/308/1/NVD6495NL_D-2319287.pdf
Provides the needed current below 3V.

Thank you for drawing attention to an important parameter. All clear now. Regards.