Re: Improved TLP250 Toshiba optocouplers for IGBT/FET TC apps (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 21 Jun 2007 08:02:13 +0200
From: Finn Hammer <f-h@xxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Improved TLP250 Toshiba optocouplers for IGBT/FET TC apps (fwd)

Brett!

Since your interrupter is situated in your laptop, which preferably is 
placed many feet away from the coil, why settle on 1/8 inch of 
electrical insulation?
Run a fiber optic cable over to the coil from the laptop.

On my music coils, I do this from a Roland synthesizer to the gate 
driver in the coil.

The parts you need for this are cheap and easy to use.
Transmitter:
It is just a LED in a smart housing that mates it to a 1000um polymer fiber:
http://www.i-fiberoptics.com/leds/IFE96.pdf

Detector:
this can be had as either open collector or TTL. They both have rise and 
fall times of 70nS.
http://www.i-fiberoptics.com/leds/IFD95.pdf

Since I learned to use these parts, fiber optic links has been a natural 
part of my projects.

Hope this helps.

Cheers, Finn Hammer

Tesla list skrev:
> ---------- Forwarded message ----------
> Date: Wed, 20 Jun 2007 19:26:55 -0700 (PDT)
> From: Brett Miller <brmtesla2@xxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Improved TLP250 Toshiba optocouplers for IGBT/FET TC apps (fwd)
> 
> Dave,
> 
> Hey that's really cool!  I have some simple C source
> code I was intending to use to make a fancier
> interrupter/tone synthesizer for SSTC/DRSSTC projects.
>  I wanted to run it via the parallel port.  I even
> have a schematic that I drew for a possibly RS232 =>
> UCC373xx interface.  The only question was proper
> isolation.  These optocouplers might be just the
> thing.
> 
> I have so many other projects I'm working on right
> now, the laptop software defined interrupter idea took
> the back burner.  It seems like the trendy thing to do
> these days is use a uController, but since I prefer a
> remote interrupter anyway, why not use an old cheap
> toshiba laptop?
> 
> -Brett
> 
> 
> --- Tesla list <tesla@xxxxxxxxxx> wrote:
> 
>> ---------- Forwarded message ----------
>> Date: Thu, 21 Jun 2007 01:56:10 +0000
>> From: Sparktron01@xxxxxxxxxxx
>> To: Tesla List <Tesla@xxxxxxxxxx>
>> Subject: Improved TLP250 Toshiba optocouplers for
>> IGBT/FET TC apps
>>
>> Was checking Digikey during lunch and found out that
>> Toshiba has
>> enlarged the classic "TLP250" family of IGBT/FET
>> optocouplers
>>
>> TLP250F<NEW>, HV version of original TPL250, BJT
>> output,
>> +/-2.5A pk drive, FET/IGBT 6.0kV pk isolation. Cost
>> (10) $15.00, (1) $1.88.  
>>
>> Lead and package configuration change to support
>> higher voltage
>>  tracking distance, same relative commutation speed
>> as original part.
>> (specified as ton and toff of <0.5us, typical speed
>> observed was ton < 0.2us,
>> toff < 0.4us).  Still a typical DIP8 package (sorry
>> SOI8 has insufficient
>> tracking distance to hold off 6.0kV pk and achieve
>> compliance certs).
>>  
>>
> http://www.toshiba.com/taec/components2/Datasheet_Sync//212/4256.pdf
>>  
>> TLP351<NEW>, FET version of original TPL250, FET
>> output,+/-0.6A pk drive, 
>> FET/IGBT 6.0kV pk isolation. Cost (10) $14.00. (1)
>> $1.75.
>>  
>>
> http://www.toshiba.com/taec/components/Datasheet/Tlp351.pdf
>>  
>> TLP350 <NEW JUST ANNOUNCED 2006>, FET output +/-2.5A
>> pk designed
>> for high speed (induction heating) applications,
>> INCLUDES UVLO (undervoltage
>> lockout on isolated DC power to FET/IGBT
>> opto-amplifier  =>12 V).
>> Improved bidirectional switching characteristics
>> (260/260ns); higher
>> frequency (50kHz vs 25kHz then original TLP250/351
>> and HV TLP250F).
>> UVLO - prevents output pulses from isolated photo
>> amplifier (HV side) 
>> even with input LED clocking unless input isolated
>> DC voltage is 
>> ~ 12V or greater (VCC+, VEE-), up to 30V or +/-12 to
>> 15VDC is acceptable.
>>
>> NEW offering, no stock at Digikey yet, new product
>> offering (2006).
>> I suspect this part will become the preferred photo
>> coupler IGBT driver for 
>> DRSSTC/OLTC/SISG applications once manufacturing
>> ramps up.
>> I suspect unit cost will be < $3.00 US each.
>>  
>>
> http://www.toshiba.com/taec/components2/Datasheet_Sync//212/21648.pdf
>> Regards
>>
>> Dave Sharpe, TCBOR/HEAS
>> Chesterfield, VA.   USA
>>
>>
>>
>>
> 
> 
> 
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