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Thread: Chinese buck converters - durable?

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    Default Chinese buck converters - durable?

    Hello.

    I have to power a simple circuit with a 12V power supply and I don't trust a lot Chinese power adapters , so my idea was using a 19V Delta PSU I have without use and a basic Buck Converter. I would even save money.

    It would be something like this: https://www.aliexpress.com/item/DC-D...737337535.html in the case of less than 12V 2A load or this https://www.aliexpress.com/item/DC-C...247251105.html in the case of higher loads (probable).

    The question is: are they durable or it would be like using a shitty adapter?

    Thanks in advance. BR

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    They should be ok. I have a similar to the first one, but as boost. But you should have some caps to spare as I can't imagine them to be very durable at those prices.

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    Thank you! In any case, the second one seems to have Sanyo "ME-WA" capacitors, •105°C, 8000 to 10000hrs.

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    Quote Originally Posted by breixobaloca View Post
    Thank you! In any case, the second one seems to have Sanyo "ME-WA" capacitors, •105°C, 8000 to 10000hrs.
    Sanyo? Used? Repurposed?
    Best, Luca

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    Quote Originally Posted by quest for silence View Post
    Sanyo? Used? Repurposed?
    We... We... Well.... I don't know

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    http://i.imgur.com/kVWJ5H4.jpg

    Here is the trick guys . Similar color caps, but announced are Sanyo and real are strange Chinese crap

    So... Seems that I have to buy proper capacitors for every buck converter I could need.

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    Depends

    How mission critical are those buck converters? If they are mission critical or absolutely critical, you shouldn't be using cheap ebay buck converters anyways...

    If it's just for raspberry pi messing around, those caps are fine. Want to run it 24/7 (but not for mission critical applications), replace them.

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    Yes. If I want to power LEDs for my room several hours a day, I change the caps. For my initial project, just powering some fans not too much time per year and with lower than maximum load.

    If I put 25V and 35V caps, could it be a problem, even considering that input is 19V and output 12V?

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    Quote Originally Posted by breixobaloca View Post
    Yes. If I want to power LEDs for my room several hours a day, I change the caps. For my initial project, just powering some fans not too much time per year and with lower than maximum load.

    If I put 25V and 35V caps, could it be a problem, even considering that input is 19V and output 12V?
    No problem, just make sure the diameter of the caps are the same size, and the capacitance is the same or larger than the original ones.

    Why didn't you just buy a LED constant current driver, and call it a day? What size LEDs are you driving? 10w?
    Hell if I remember when I get home, I'll show you something with one of those cheap boost converters I was working on...

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    No, I'm not talking about LED bulbs, sorry for the bad explanation. It would be a LED strip where the Chinese suppliers give a bad quality power adapter. I would maybe need another for a basic LED project, but I think we conclude this: ultra-critical (nothing for now) = search for a proper buck converter; high hours of use = replace caps; casual use = do nothing.

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