why papa doesnt choose Lateral Mosfets?

[rhythmsandy]

why papa doesnt choose lateral mosfets what makes him to choose irfs? very confused about this...😕

 

[Zen Mod]

in 10 years or so , you'll know the answer

let's just mention lateral thinking , besides several other factors

 

[rhythmsandy]

cant wait for 10 years..!

 

[Zen Mod]

read all of these , and you'll know :

FIRST WATT FAQ

http://tinyurl.com/nagzmdm

 

[indra1]

Sometimes, like this case, not knowing has its benefits. 😉

 

[Nelson Pass]

I have a couple projects using laterals.

😎

 

[Zen Mod]

like always ....... answer which is not answer which is , in fact , complete answer

 

[nigelwright7557]

Expensive and hard to source these days.

 

[indra1]

But still plentiful at least in eastern - south eastern part of Asia. About $6 for K1058/J162 pair in Jakarta, no online store though.

 

[kasey197]

i am going to speculate that those are not laterals np is referring to..... these have been around in some form or the other since the early 80's at least.
If they haven't yet shown up in a np project, one would guess that they are not going to.

 

[indra1]

I totally disagree with your reasoning on this one Kasey, the commercial SITs are already out of production since the early 80's, but when was the first NP SIT related article came up? I don't think your bait will be effective. 😉

 

[cwtim01]

Mr. Pass did mention recently that he has some F5 using laterals:

http://www.diyaudio.com/forums/pass-labs/255523-recommendation-5-10w-amp.html#post3910072

The exact laterals were not specified so the speculation continues ...

 

[jackinnj]

Laterals have lower transconductance than verticals. They are also less robust.

But they are wonderful when it comes to thermal issues.

 

[Nelson Pass]

i am going to speculate that those are not laterals np is referring to.....

So that you don't have to speculate needlessly, I have a nice selection of
laterals, dating back to early Hitachi parts. Most recently I have acquired a
stock of Alfet parts: ALF08N16V ALF08P16V

😎

 

[poynt99]

Profusion Lateral MOSFETs

 

[kasey197]

So that you don't have to speculate needlessly, I have a nice selection of
laterals, dating back to early Hitachi parts. Most recently I have acquired a
stock of Alfet parts: ALF08N16V ALF08P16V

😎

Thanks 🙂
Was on the verge of buying a few of those interesting EPC parts.
I recall that they were discussed a few years ago.
Did you ever try them ?

 

[Nelson Pass]

Yes, they work fine.

😎

 

[hitsware]

Laterals have lower transconductance than verticals. They are also less robust.

But they are wonderful when it comes to thermal issues.

Less transconductance for sure, but pretty darn robust .
I would say (in my own limited (but substantial))
experience harder to destroy than IRF types ........

 

[Nelson Pass]

I am not aware that they are more robust as such, but the lower tempco and
transconductance will contribute to reliability in cases of inadequate design.

On the other hand, their lower capacitance makes them more vulnerable to static.

😎

 

[hitsware]

> I am not aware that they are more robust as such,
> but the lower tempco and transconductance will contribute
> to reliability in cases of inadequate design.

And even in cases of adequate design !

> On the other hand, their lower capacitance makes them more
> vulnerable to static.

With a properly chosen gate resistor ( ~ 1 k Ohm )
the static is reduced
PLUS !
The integrated gate to source zeners
(weakest point)
are protected !