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Re: Bygge switchmode, for varm FET
On 20-07-2014 19:50, Ulrik Smed wrote:






 >treshold




Hilsen
Klaus

Re: Bygge switchmode, for varm FET
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giver det ikke ret megen forskel med og uden gatemodstand, det er mest en  





--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET
On 20-07-2014 22:13, Ulrik Smed wrote:

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ellers med "mens den svinger"?), eller den begynder allerede at lede,  


forsinkelse som indikation for at den til at begynde med arbejder i sin  


stor induktans i din gate ledning.




Klaus

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Re: Bygge switchmode, for varm FET
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Gate ledningen er parsnoet med stellen fra driveren, og parrets anden ende  
er forbundet til source/gate. :-) Og uden gatemodstand er forsinkelsen  










f.eks 0.5 volt per tern. Det er det jeg mener med 'mens den svinger'. Med et  



on-perioden rent faktisk er under 1 volt.


off-perioden?

--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET
On 21-07-2014 00:51, Ulrik Smed wrote:
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[snip]



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engang arbejde med var elendigt, mens en LeCroy klarede det uden problemer)




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Klaus

Re: Bygge switchmode, for varm FET
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Den er godt 11 volt.

--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET










--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET









--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET
Den tirsdag den 22. juli 2014 07.57.38 UTC+2 skrev Ulrik Smed:
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c tab.


alex

Re: Bygge switchmode, for varm FET
Den tirsdag den 22. juli 2014 07.57.38 UTC+2 skrev Ulrik Smed:
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til tab denne vej
alex



















--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET
On 22-07-2014 19:25, Ulrik Smed wrote:






Tillykke med det!

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vil sige ved 50 kHz er den gennemsnitlige effekttab 850W*135/20000 = 5.7 W.



godt ramt!


Klaus

Re: Bygge switchmode, for varm FET
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Takker! :-)




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--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET [ magisk-røg ]
On 22/07/14 19.25, Ulrik Smed wrote:
...


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Hej Ulrik



Magic Blue Smoke Refilling Kit:
https://www.sparkfun.com/products/retired/10622
Citat: "...
Through a serendipitous accident in our research labs, a bit of this  
powder was let out into the air. The plume traveled across the lab and  
came into contact with some broken equipment we had piled in the corner.  
Like magic, the equipment came to life and was revived.
...
Note: Please use in a well-ventilated areas as the fumes may be harmful.

Specifications:

* 12v, 150A input for TGPIFS
* Applicator good for roughly 20 ICs
* Kit designed for SMD or PTH
* Disposable applicator
..."

Glenn

Re: Bygge switchmode, for varm FET [ magisk-røg ]
On 26/07/14 16.20, Glenn wrote:
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SparkFun 4-1-11 Product Showcase:

http://www.youtube.com/watch?v=Ex8oY24zycQ


Glenn

Re: Bygge switchmode, for varm FET [ magisk-røg ]
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tilbage. Gad sgu godt se et apparat der kunne redde den 'situation', haha.  
:-D

--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET [ magisk-røg ]

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elektronikmekanikere kalder det apparat en loddekolbe ;)
--  
Jan_stevns


http://www.facebook.com/?ref=logo #!/groups/biltosserne/

Re: Bygge switchmode, for varm FET [ magisk-røg ]
<jan_stevns> skrev i en meddelelse  
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Den var i sokkel. ;-) Soklen var lidt sortsvedet, men overlevede.

--  
Ulrik Smed
Aarhus



Re: Bygge switchmode, for varm FET
Den mandag den 21. juli 2014 20.18.00 UTC+2 skrev Ulrik Smed:
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en forbliver under det  
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l geng?ld  
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?re et problem nu  
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op jeg  
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 overstyrer den ene  
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t viser rigtigt ved  
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r peger mod drain,  
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n kun bunden af  
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yep, tricket ses her brugt til at bruge Rdson some current sense  

http://www.irf.com/product-info/datasheets/data/ir2127.pdf

-Lasse  





Re: Bygge switchmode, for varm FET
On 24/07/14 00.16, snipped-for-privacy@fonz.dk wrote:
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http://dren.dk/carpower.html





Glenn


Re: Bygge switchmode, for varm FET
On 24/07/14 21.20, Glenn wrote:
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ucc380x eller UCC3813 familien:

UCC 3800/1/2/3/4/5 BiCMOS CURRENT MODE CONTROL ICs:
http://www.ti.com/lit/an/slua149/slua149.pdf

Differences Between the UCC3813 and UCC3800 PWM Families:
http://www.ti.com/lit/an/slua247/slua247.pdf
Citat: "...The UCC3813 family is a lower-cost version of the UCC3800  
family of industry standard PWM controllers..."

Andre varianter som er ringere end ucc380x-familien er:
UCC38C43
MIC38HC43-1

Glenn

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