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Old 16th March 2013, 05:25 PM   #1981
Zen Mod is offline Zen Mod  Serbia
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nasty Dutchsiess

gollumgollum
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Old 16th March 2013, 05:28 PM   #1982
WalterW is offline WalterW  Netherlands
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Ah, thanks everybody!
If it's about 14 Watt's in total, it will hold...
Hmmm, ZM posted a link for alldatasheet.com and now the site is down, hahaha
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Old 16th March 2013, 05:42 PM   #1983
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Quote:
Originally Posted by WalterW View Post
Hmmm, ZM posted a link
Typical him, you'll get used to it
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Old 16th March 2013, 07:07 PM   #1984
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ZM ; upper left corner
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Old 16th March 2013, 08:22 PM   #1985
WalterW is offline WalterW  Netherlands
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Quote:
Originally Posted by Zen Mod View Post
ZM ; upper left corner
I think you mean this?
See pic.
Ouch...than it's at 2,5 Amp forward, average, 50 % duty cycle, about 2,4 Watt...even more then I calculated... ?
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Old 16th March 2013, 08:41 PM   #1986
Zen Mod is offline Zen Mod  Serbia
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naah

just read what my Dutchie Whale is writing ......

you're having - what ? - 2A5 Iq

overall 8 diodes ( in two Graetzs ( btw. one Graetz bridge is having 4 of them - ook wiki if you don't read it )) ;

conclusion - in each halfperiod you'll having half of 8 diodes conducting ...... that's translating as 2A5 burden on all 8 diodes in full periode

so 1A25/4 diodes is ........ 0,3125A

even if I erred 100% , say that that plate will be warm
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Old 16th March 2013, 09:40 PM   #1987
WalterW is offline WalterW  Netherlands
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[QUOTE=Zen Mod;3414010]naah


so 1A25/4 diodes is ........ 0,3125A

Hi Zen Mod, this last one I don't understand...
See pic.
Every conducting diode is seeing the 2.5 A ? Ok, maybe x 0.707 or something because it's a sinewave...but why divide it by four?
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Last edited by WalterW; 16th March 2013 at 09:43 PM.
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Old 16th March 2013, 10:00 PM   #1988
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I may be wrong but here goes. Of the 4 diodes pairs 2 conduct pos. and 2 neg. one pair each direction 1/2 of the cycle thus produce 2.5 a / 4 pairs of diodes or 1.25a /4 there it is Zen Mod answer or at least what I understand . The drawing shows a 4 diode bridge when we have an 8 diode bridge ( each to-247 is a pair) . Hope that helps.
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Old 16th March 2013, 10:03 PM   #1989
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it will be warm

plate

not hot

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Old 16th March 2013, 10:46 PM   #1990
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