Can I add a FET in parallel to this boost circuit

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DarrenB

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I use these AliExpress boost converters to charge batteries but I would like to make it function closer to its rated specifications. At the moment it gets really hot when at around 70% of its max rated load. I have tried replacing the fan with one that has a higher static pressure rating and it helped considerably but I was thinking I could take it further by adding a larger heatsink and another FET in parallel. Is it possible to add an identical FET in parallel to this pre made boost converter? It currently uses a 055N15A but If possible I would replace it with 2x IRFP4568. I know that the total heat will equal roughly the same but I am more concerned the thermal path being larger and the heat being shared across two packages. I am a complete beginner when it comes to electronics so please forgive me if this is a stupid question.

 
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Both. Became a tech first in Navy, then schooled after service.

Prior to all that lots of hobby build stuff, make mistakes, keep building. Read
everyday (literally, rarely missed a day reading for just 1 minute or hours) for last
70+ years stuff I did not understand and slowly beat into my head concepts I started
to find correlation in.


Regards, Dana.
 
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Ok here is what I think is the gate driver. Is it ok to upgrade the mosfet? Also here are the data sheets for the 055N15A and the TK56A12N1. I have highlighted some specifications that jumped out when I was looking at them, are these values important if we are looking at gate capacitance? If it has lower capacitance but the switch time is longer is it still a good choice?
 
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Thanks. My ability to understand that information stops at the Toshiba document. Could you give me your basic opinion in regards to replacing the 055N15A with the TK56A12N1? I can't go too deep with you on this subject unfortunately because I don't know anything about electronics.
 
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There is no easy answer in light of lack of original design criteria used
and docs covering this. One would have to use a schematic to start,
then evaluate your requirements for load requirements.

You can save a lot of grief and be safe and reliable if you purchase a
supply that meets your needs.


Regards, Dana.
 
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