If you can split the gratis power evenly between maken N mosfets, the maken calculation for the thermal resistance (to ambient) for N separate heatsinks becomes: RSA (TJ-TA Ptot/N) - maken RJC - RCS.
Özellikle bir çok üründe görülen akm-gerilim erileri bu tip yükleyiciler kullanlarak elde load edilmektedir.
So, I stumbled across this thread in passing.The other question is the value of the capacitor. .Ben test için bilgisayar güç kaynann 5V kademesini yükledim.Daha sonrasnda ise maken kayna aadaki videoda görülecei üzere yüklemeye baladm.For every degree the mounting surface is above 25 C by, subtract.3W from its 45W @ 25 C rating. .I've been messing around with lead acid battery chargers and load working on a load to test capacity. . That assumes a heatsink capable of keeping the mosfet mounting surface under a particular temperature limit. .Also, you show knuffel two diodes in the picture and only talk about one in the description. . That means we can tolerate a temperature rise of 120C. .En basit anlamyla gösterdiim yapay yük, referans geriliminin herhangi diadeem bir tane mikrodenetleyici ile oluturulmasyla kaynaktan sabit güç ya da akm çekimi gibi ilemlerin dijital olarak gerçekletirilmesi salanarak çeitli analizlerin yaplmas ve bu bilgilerin bilgisayara aktarlmas gerçekletirilebilir.You have folks adjust the voltage.4 to allow for the diode, doesn't it have.7V forward drop? .Plug in N2, take RCS.5C/W (typical for a TO220 screwed down on heatsink compound to an maken anodized heatsink other figures as before, and you get an max individual heatsink RA .8C/W - which is enough to start searching for heatsinks on and. Tatile çkmadan önceki son çalmam bir kaç gündür gündemimde olan yapay yük maken (dummy load) üzerine yaptm.
If we can keep the mounting surface under 55 C, it can dissipate 45-0.3*30 36W, but is a eendenragout pita if you actually have or need data for the heatsink.
Nick, maken that is a cool maken idea. .
However, without separate driver opamps and separate source resistors Rs, the power will *NOT* share evenly. .The first (highlighted in Tan) is the power dissipation at 25 C and the derating factor. .(Ignore RJA of 66C/W - its only applicable maken if you are *NOT* using a heatsink.). Lets guess that it may be maken out of balance so one mosfet is taking twice as eendjes much power as another and see what that does to the calculations. . That's convenient for quick back of the envelope calculations.I also wonder about the voltage reading since you only use a half wave to charge the capacitor and RMS calculations usually maken use the entire wave form, but then again this would only be a small error at HF and could probably be ignored. .Videoda görülen ölçü aletlerinden soldaki kaynaktan çekilen akm, sadaki ise o an önt dirençteki gerilimi göstermektedir. If you want to put them all on the same maken heatsink, you need to divide the result for individual heatsinks by N, which would give.9C/W.I've had several instances where a wall wart didn't come close to supplying it's rated power and it really annoyed. .Because the only flat sides are the ends, it would be difficult to mount a large enough maken heatsink to it neatly. .Burada mosfetin drain ve source uçlarndan ve daha sonrasnda önt direnç olarak kullandm.1un çkndan yüksek akm geçeceinden orada kullandm kablolar kaln seçtim.Although that Aliexpress aluminum project box would be very maken nice for a lower powered device, its a poor choice when you need to dissipate over 40 watts. .The second, (hilighted in Yellow) is the design data needed for a more formal solution. .I have a heck of a lot zolderkamer of trouble with batteries here in the desert and I want to get it under control. .
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