#33 - Minleaf NPS605W - Part 1 - Bench power supply - Teardown

Twitter - @xyz_concepts
In this video, we dive into a really cheap Chinese bench power supply teardown. Priced at about $80AUD delivered, is it worth it? Let’s find out!

#Cheap #Powersupply #NPS605W #Teardown

[actualserge]

The TNY chip is used to power the control logic, the lower small transformer (the red one) performs the conversion, the feedback is done using the optocoupler. The actual switching brain is the TL494 which switches the main power transformer using the pair of MOSFETs controlled through the upper small transformer (the green one). The 3-pin "switching element" device is actually a diode assembly, the "buck coil" is a choke. V-1 and A-1 are controlling the maximum voltage and current. As far as I understand, the real manufacturer is Wanptek, Minleaf just rebrands them. How noisy this new one is? Still fighting with my NPS3010 being very noisy.

[TroyBaverstock]

Thanks for the review. This along with part 2 is everything I wanted to know so I appreciate the effort and time that’s gone into it.

[zfgesk]

Great video! You mention that you use this to charge e-bike battery packs. I'm assuming they have a BMS built in? I'm thinking to use this for all my electric skateboards. What happened when the battery is fully charged?

[xcliffx]

I've got one of these that's a couple weeks old now. I left it trickle charging a bank of batteries at 13.6 volts for a week and turned it off. When I tried to turn it back on nothing happens. The fuse, power cable, and switch are good. Would you have any ideas on the most likely failure points that I can check with just a multimeter?

[dauerwerbesendung]

Can anyone tell me the part nr. for the switching element you point to at 4:57?
I hooked up the PSU to charge a LiFePo bank at 28V/5A. When I tested the BMS on/off switch the switching element in the PSU let out the magic smoke. I cannot read the part number off the broken component. Its something like C023???? 166????. Thanks a gazillion!

[grahamtownsend]

I bought a cheap Chinese soldering iron and managed to cut the power cord with the iron itself, the current world situation notwithstanding, I tend to avoid anything Chinese.