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I have bought and used a dozen of these over last several years and none has ever failed. In fact, I exceed the specs regurally..read more below. The max power handling is limited by p;ackage size of 350W and the higher power models have temp triggered internal fans. So you can buy a 36V at 10Amp or 48V at 7.3AMP. Selectable by swit h 110/220v. I have bought from several ebay sellers, one in US becasue I was in a rush, and IMO, all are built by same mega factory in China. The QC stickers, pots and leds are all the same even with different branding. Some listings call these LED strip supplies for lack of a btter understanding of what people ujse them for. They cost as litgtgle as $30 delivery incl !!!!
Here is what is interesting. They use standard PWM chips with "slow" loop-time, over current sensing, so In a a pulsed power application, especially at lower duty cycles, I have seen these put out 2X theri rated current!! They also have adjustung pots so a 24V can be set to 28V and a 48V to 51V. I use these with a Mazilli driver to runs Jacobs Ladders. In this application the supply current is low (maybe 4 amps) when the spark begins or stays "stuck". When it reaches the top, and breaks, the current surges to 3-4X the static as the secondary is momentarily open and the flux momentarily goes to saturation and you have a virtual short circuit in your tank. I love using old analog Current meters as you can "see" the current change.
Although I have not done this, it looks to be very easy to parallel two or more of these by simply connecting the voltage sensing pins on the PWM chips inside each of the units. You can't just put them in parallel and if you don't know why, then don't attempt this. This is a common technique in DC-DC converters and I see no reason why it would not work here. So, as these sell for 80 cents a watt, one could have a 48V at 15AMP supply, 30AMP peak, using 2 of these guys for under $60.
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Inexpensive High current DC Supplies on ebay
