The difference between this charger and any other charger we looked at is that it lists Shortcircuit/Overload/Overvoltage/Overtemperature protection. No other charger I looked at has all 4. I only had good experience with meanwell - I am no expert but all their stuff looked well made, not like a 5yo did the soldering and no components that looks like they were recycled. However, I used different lines and as always, YMMV.
At mysensors, we need reliable powersource that will be reasonably safe to keep inside a box or inside the wall cavity. Because of that we need a charger that has OTP. Many members use the square Chinese chargers that failed almost every test. We are looking for something that:
Can be bought from the source or undisputed distributors
Normally priced - each of us uses over 10 chargers only for the sensors. a 20$ sensor will make the charger cost more than the sensors….
Has as many protections as possible - as I said it needs to be in a box or behind the switch
reasonably clean signal - the arduinos/nrf are not very fond of noisy signal.
If you can recommend any other charger that fulfill even almost all these requirements, I’ll be very happy to use it.
When i said nothing special that excluded typical low cost china PSU.
All that protection is based on controller IC capability. Most of controllers are internally protected for these conditions, so nothing special about that. But beware that meanwell states OVP 105-200% rated output voltage.
That might be so. Can you please point me to any wall-wart (meaning that it connects directly to the wall) charger that state having OTP? I failed to find any.
Hi HKJ. Seems more and more surge suppressor power strips on the market are featuring built-in USB charging ports. Have you considered disassembling and reviewing some of these? I’m curious how they compare to dedicated charger units.
It looks like BlitzWolf_40W_5_port_usb_charger and Eachine_PA40W_5_channel_usb_power_charger share the same board. But Eachine is using a much better quality 2014 rev., and BlitzWolf_40W_5_port_usb_charger a 2013 rev.
I am not sure there is much quality difference between the boards.
Many 5 port usb chargers uses revisions of this board, some of them better than other (Anker has electronic overload protection, not a fuse).
Thanks for all the USB mains adapter testing and the details how the 2.5 and 5kV test are done using the Uni-T 513: test time usually less then 30 seconds and your quote:
Regarding the category of smaller green ticks (possibly safe, haven’t read the CE test report): Have you ever tried a distributor/manufacturer to ask for their CE test report?
Investigators have warned consumers they face potentially fatal risks after 99% of fake Apple chargers failed a basic safety test. From a report on BBC:
Trading Standards, which commissioned the checks, said counterfeit electrical goods bought online were an “unknown entity.” Of 400 counterfeit chargers, only three were found to have enough insulation to protect against electric shocks. It comes as Apple has complained of a “flood” of fakes being sold on Amazon. Apple revealed in October that it was suing a third-party vendor, which it said was putting customers “at risk” by selling power adapters masquerading as those sold by the Californian tech firm.
I like your table but maybe you can be more specific about the risk.
What is the risk of the person getting a mains shock?
What is the risk of destroying your device being charged?
@HKJ: are you referring to the isolation distance being too low when the power is still high AC, before it’s converted to 5vdc? I’m still learning, and I’ve seen cuts in circuit boards in high voltage areas to isolate components.
No, between the mains voltage and the low voltage (There are some legal requirements).
The distance between mains voltage parts can be fairly low without any trouble.
