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Topic: Favourite Power MOSFET (Read 2928 times) previous topic - next topic

Si

Sorry - book research again.

I have a favorite power MOSFET. The FQP33N10. They cost about 80p / $1 each, are ok for logic level switching and generally rock.

http://www.farnell.com/datasheets/104979.pdf

However, while Mouser and Digikey do sell them, they don't seem to be that commonly used in the US.

Any one got a nice logic level N-channel Power MOSFET recommendation?


MOSFET, N, TO-220
Continuous Drain Current Id: 33A
Drain Source Voltage Vds: 100V
On Resistance Rds(on): 52mohm
Threshold Voltage Vgs Typ: 4V
Power Dissipation Pd: 127W
Current Id Max: 33A
Pulse Current Idm: 132A
--
I write books about Arduino and Electronics: http://simonmonk.org

focalist

#1
Jun 26, 2012, 02:40 pm Last Edit: Jun 26, 2012, 05:45 pm by focalist Reason: 1
http://www.ebay.com/itm/10-PCS-RFD3055LE-RFD3055-IC-BOX-86-/160768659447?pt=LH_DefaultDomain_0&hash=item256e8f0ff7

RFD3055LE


Drain to Source Voltage (Vdss)                -  60V
Current - Continuous Drain (Id) @ 25° C   -  11A
Rds On (Max) @ Id, Vgs                          - 107 mOhm @ 8A, 5V
Vgs(th) (Max) @ Id                                - 3V @ 250µA
Gate Charge (Qg) @ Vgs                         - 11.3nC @ 10V
Input Capacitance (Ciss) @ Vds                 - 350pF @ 25V
Power - Max                                         - 38W


I'm loving these for switching power LED's.  About forty cents each in ten quantity, including shipping.  Remind me to order some more next week, will ya?

I've run these pulling nearly 6A at 12v and they barely get warm.  At 2A, they don't even get above room temp.  I don't bother with a gate to source resistor, as I understand the internal resistance in the microcontroller is more than enough to discharge the gate (and I've had no problems with shutoff delay to indicate otherwise).  I was intimidated by MOSFETs far too long, these are easier to use and more efficient than any bipolar transistor.

Right now I have three of them on a vectorboard next to me, providing PWM for a five meter RGB LED strip light (24 watts per color), controlled by the arduino of course... they are also the MOSFET I am using for the LED flash.  Can't seem to find fault with them, even seem to be relatively static tolerant, to the point of a nice carpet-spark discharge to one I went to solder not causing any apparent harm.

I was previously a fan of Darlington NPN's for switching (like TIP120), and for low power I still will use ULN2003 line - can't beat them for ease of use.  However, for anything over a couple hundred milliamps... these here MOSFETs are the bee's knees.  If there's an equivalent MOSFET array to the ULN Darlington arrays, that would be perfection (assuming it also cost only a buck or so each, that is...)

Si

Quote
RFD3055LE


You can't really argue with 20c a transistor!

Nice.
--
I write books about Arduino and Electronics: http://simonmonk.org

focalist

#3
Jun 26, 2012, 05:43 pm Last Edit: Jun 27, 2012, 01:12 am by focalist Reason: 1
Dangit, I couldn't make myself wait.  Just ordered another twenty of the suckers.  Seven dollars including shipping, and the last time I ordered them, they were here in three days.  They really seem to be a clearinghouse for bulk surplus parts, so I don't know how long their supply will last.  I've bought a couple of things from this vendor, and been really happy overall..

When run through Octopart I see prices ranging from 30 to 60 cents per unit, even that is a pretty good price.  (I only price out through hole.  I am still SMD phobic)
http://octopart.com/partsearch#search/requestData&q=RFD3055LE&start=0&sortby%5B%5D=avg_price&sortby%5B%5D=asc

This mean I get a signed copy of the new book?   :smiley-mr-green:

Coding Badly


@retrolefty has recommended one several times.  I'll see if I can find it...

Coding Badly


I think this is the one...
http://www.sparkfun.com/products/10213
http://www.sparkfun.com/datasheets/Components/General/RFP30N06LE.pdf

thegeekway

IRF510, not sure why, might be because I bought hundred a few years ago.

kf2qd

IRFB9N60A
4V operation and 9.5A
$2.52 each
Using them on an ATtiny2313 controlled Step/Direction Unipolar Stepper driver.

MarkT

IRLS3036-7PPbF  1.5mOhm typical at 10V, 1.7mOhm at 5V.  Continuous current package limited at 240A, pulsed current limit 1000A.  gate capacitance 11nF(!)  D2PAK with 6 legs.

Having said that I haven't found a use for it yet!
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

kf2qd


IRLS3036-7PPbF  1.5mOhm typical at 10V, 1.7mOhm at 5V.  Continuous current package limited at 240A, pulsed current limit 1000A.  gate capacitance 11nF(!)  D2PAK with 6 legs.


Okay - $7.62 qty 1
But how do you hook up a surface mount device that size and then run 240 Amps through it???

zstergios

#10
Apr 21, 2017, 11:33 am Last Edit: Apr 21, 2017, 11:44 am by zstergios
Hi!
My arduino runs on 3.3v and I would like to switch ON/OFF the GSM module (v3.4 to v4.4), which N-MOSFET do you recommend?

For Amps, I'm not sure but I think up to 3A. I power the project with 3.7v (fully charged 4.2, 4000mA)

I have found these:
RFP30N06LE https://www.sparkfun.com/products/10213
TP60NF06 P60NF06 MOSFET TO-220  http://www.ebay.com/itm/10pcs-STP60NF06-P60NF06-MOSFET-TO-220-/180912805769?hash=item2a1f3e5789:g:3LkAAOxyqOxRt81W


Which is the best choice?

travis_farmer

Quote
Sorry - book research again.
in bar sport, i don't think the "sorry" is really needed. look at what i get by with ;)

(probably far more than i deserve)

Personally, i think research is always valid, as it shows ones endeavor to learn. :D

~Travis
Currently trying to rebuild a 48" X 48" X 5" (working area) CNC Router.

allanhurst

There are loads of excellent power MOSFET's available these days... some mentioned above. I quite like the IRL1104.

I reckon they beat the pants out of bipolars for switching. But concur with the above comments - how can such a tiny bit of lead cope with such huge currents? Look at the starter leads on a car rated at 200 amps or so.

Answer - not for long!

But for high voltage I'd look at IGBT's

Allan.

larryd

"how can such a tiny bit of lead cope with such huge currents? "

1 inch of 22AWG copper is .002 ohms.

.
No technical PMs.
The last thing you did is where you should start looking.

allanhurst

#14
Apr 25, 2017, 02:40 am Last Edit: Apr 25, 2017, 02:51 am by allanhurst
So at 100A it dissipates 20 watts  - how long will it last?

Look at a 20W power resistor - it's surface area is MUCH bigger. And it's probably wound with nichrome, which will withstand a much higher temperature before it melts ...

Allan

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