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Triode Transistor
Triode Transistor
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Old 3rd October 2018, 10:36 AM   #1
oon_the_kid is offline oon_the_kid  Malaysia
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Default Triode Transistor

Hi,

I came across this SiC Jfet from Littlefuse, The curves look very thriode for Vds. I thought I share it. Any comments on it?

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Old 3rd October 2018, 12:39 PM   #2
Nag is offline Nag  India
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Triode curves are vertical lines. But above are horizontal. May be some one with lot of experience on these can look into it.
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Old 3rd October 2018, 01:32 PM   #3
alexberg is offline alexberg
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SiC MOSFET is actually Baliga pair, meaning cascode connected small voltage mosfet and high voltage JFET. There are NormallyOpern JFET leftovers by Infineon. They still exist due to $50 apiece.

Last edited by alexberg; 3rd October 2018 at 01:43 PM.
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Old 4th October 2018, 06:06 AM   #4
oon_the_kid is offline oon_the_kid  Malaysia
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Quote:
Originally Posted by Nag View Post
Triode curves are vertical lines. But above are horizontal. May be some one with lot of experience on these can look into it.
Actually triode lines are diagonal so I changes with Vds like a resistor. If you look at the 22A version, it definitely looked like diagonal lines (figure 3) the only thing, is this is a 10s of A scale. What is more important is the few amps curve which unfortunately, can't be seen so clearly.

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Old 4th October 2018, 12:26 PM   #5
alexberg is offline alexberg
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You may try low current SiC fets like C2M1000170D or SCT2H12NZGC11 or SCT10N120 or sct2450ke.
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Old 4th October 2018, 05:27 PM   #6
Nelson Pass is offline Nelson Pass  United States
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Triode Transistor
If you want Triode-like action, look to the low voltage part of the curves,
and maybe take a look at the F3 design, where cascoding is used to
get you there.
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Old 20th February 2019, 07:18 AM   #7
oon_the_kid is offline oon_the_kid  Malaysia
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Hi Nelson,

I think this must be a new product, I don't recall coming across it the last time. This one is very much in the current we play in. I would say the graph looks triode to me, however as the temperature goes up it doesn't look very triode anymore.

What do you think of the potential of this for a single ended design.

LSIC1MO170E1000 Littelfuse Inc. | Discrete Semiconductor Products | DigiKey

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Old 20th February 2019, 08:18 AM   #8
indra1 is offline indra1  Indonesia
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Quote:
Originally Posted by oon_the_kid View Post
... I would say the graph looks triode to me, however as the temperature goes up it doesn't look very triode anymore.
What do you think of the potential of this for a single ended design....
To me, the output characteristics has no resemblance to any garden variety triode used for audio that I know of. So to me it will not sound like a triode on a SE design without feedback, but perhaps the part is great for SE with Schade feedback or combined with a real triode like Shinichi Kamijo-san STC design.

However, if you are very sure that the chracteristic looks very triode, perhaps it sounds triode enough to you as well. Sound perception depends very much on the state of mind of the listener.
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Old 20th February 2019, 09:42 AM   #9
Zen Mod is offline Zen Mod  Serbia
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Triode Transistor
they say "Ultra-low on-resistance"

while is written "Typical RDS(ON) 750 mΩ"

what's typo there ?



though : Power Dissipation P
D TC = 25 C, TJ = 150 C 54 W

I would use that only in RIAA Eq , considering maximum power

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Old 20th February 2019, 03:37 PM   #10
vdi_nenna is offline vdi_nenna  United States
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Triode Transistor
What do you think will happen if you extend the output characteristics to 24v?
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