How do I connect this PWM-controlled supply board properly?

[Ioannis]

... but there's some doubt if it will "remain ON".

I do not know what you mean by that. MosFets are not Thyristors or Triacs. A MosFet will be on if the drive is within specs and as long as there is drive. It will not remail ON if there is no drive.

Ioannis

[Demon]

I do not know what you mean by that. MosFets are not Thyristors or Triacs. A MosFet will be on if the drive is within specs and as long as there is drive. It will not remail ON if there is no drive.

Ioannis

Sorry, I didn't keep a link of what forum I read that from. One of the "gurus" was saying it's not enough to turn ON a MOSFET, you must ensure it "remains" ON.

I also thought ON meant ON.

[Ioannis]

OK. If your drive is not within specs, your MosFet may not turn ON and this means it will be a resistor instead of a closed switch with low resistance.

Now, choosing a MosFet with 20Amps does not necessarily means that it will stay cool. For this to happen you must select one with low Rds ON resistance. Many recent ones do exhibit also that low Rds.

Finally you want it to be SMD or TO-220 ?

Ioannis

[Demon]

...Now, choosing a MosFet with 20Amps does not necessarily means that it will stay cool. For this to happen you must select one with low Rds ON resistance. Many recent ones do exhibit also that low Rds.

Finally you want it to be SMD or TO-220 ?

Ioannis

I need it to be through-hole only to test my code, production will be SMD. At $20 a pop, I will probably only use 2 to test the daisy-chain logic and circuitry.


The need to drive the 7-segment LEDs has evaporated with my recent discover of the MAX7219.

I'm only driving a 2A LED strip of 3 feet now.

[Ioannis]

Found on Mouser two choices:

At 0,781 euros per piece IRFIZ24NPBF, a 55V/13A, 70mOhm, Vth at 1.8V https://gr.mouser.com/ProductDetail/...E5KLNbCg%3D%3D

At 2,23 euros per piece FDP070AN06A0, a 60V/15A, 7mOhm. Vth at 2V. https://gr.mouser.com/ProductDetail/...Y6Zv7sew%3D%3D

With the second the power dissipation at 2A will be 0,028 Watts !!!

With the first 280mW. Also pretty good I guess.

Note that the first is marked as LC (reaching end of life or something).

Ioannis

[Julianed]

Found on Mouser two choices:

At 0,781 euros per piece IRFIZ24NPBF, a 55V/13A, 70mOhm, Vth at 1.8V https://gr.mouser.com/ProductDetail/...E5KLNbCg%3D%3D

At 2,23 euros per piece FDP070AN06A0, a 60V/15A, 7mOhm. Vth at 2V. https://gr.mouser.com/ProductDetail/...Y6Zv7sew%3D%3D

With the second the power dissipation at 2A will be 0,028 Watts !!!

With the first 280mW. Also pretty good I guess. best sex dolls

Note that the first is marked as LC (reaching end of life or something).

Ioannis

The power consumption of the second one is too good, isn't it?

[Ioannis]

That is what you get for that price!

Ioannis