New Toshiba Mosfets

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#2
wdecho said:
I just received an email from DigiKey saying new products and I was attracted to this. I am first to admit I do not know what I am looking at or if they could be used in audio. I'll let more knowledgeable people in electronics take a look at them and see what they think.

DTMOS4 High Speed Super Junction MOSFETs - Toshiba | DigiKey

Opinions anyone?
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Hi!
Haven't seen anyone jump in yet so here is my two cents worth.
Anything with Toshiba's label on it catches my attention. I took a look at one of the devices and saw some decent characteristic curves ( but I'm no expert in the field). One interesting thing noticed was the Ciss curve was pretty flat across the graph. The other two gate capacitance curves were not so nice looking. I remember reading on another post that the super junction devices are not know for their linearity.
 
#3
mikegranger said:
Hi!

Anything with Toshiba's label on it catches my attention.


That is what caught my attention also, the Toshiba name. I think the new SIC Jfets are better for audio but I admit my knowledge of reading the charts is low. I am waiting for some new SIT's to get to the market. NP has said they are out there but right now military uses and not for the general public.
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#5
Is that a knee I see?

Looked up the datasheet for the higher current To247 version - TK62N69X

I was hoping to see if it was based on Trench FET technology, or not.
Generally all Trench FETs with low Rds-on are not recommended for audio amplification.

I see that it has a very pronounced second breakdown. Fig 8.17
How many times do we see that FETs don't suffer second breakdown?
The knee in the Id vs Vds occurs at 100V.
Full power of 400W @ 100Vds.
This drops to 60W @ 200Vds for this 600V device.

If you have +-100V supply rails, this 600V device is de-rated to an effective 60W

I won't be using it for audio.
 
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