LHY LPS-25 5 volt and 12 volt power supply

Intro

The Chinese brand LHY is now a familiar name on this platform. From this manufacturer we have already checked out the nice switch and some power supplies. Now it is time to take a closer look at these power supplies. We look at the 5 and 12 volt LPS-25 (supplied by Boelsz). Especially the 5 Volt version.

A power supply really only has one job: to provide fast, clean and stable power. Now that sounds very simple, but it is not. And that is evident from the countless designs we see passing by. Both at the “micro” level we see differences, but also the variations on the various types of power supplies: linear and switching, for example. Or the use of supercaps instead of as few capacitors as possible. Each technology has advantages and disadvantages. And we believe that at in the end, there are only two types of power supplies: bad ones and good ones.

The LHY LPS-25

LHY markets a linear power supply with the LPS-25 that can deliver a maximum of 25 watts. For a 12 volt version, this means that the power supply can deliver a maximum of 2 amps. The 5-volt version can load up to around 3A. Probably due to the heat generation of the voltage regulator.

The linear power supply has been kept quite compact. On the back we see two connections and, of course, the mains connection. Furthermore, we see a possibility to adjust the voltage. This was not necessary in our case.

On the front we see a display that shows the voltage. Nice, but not really necessary. And probably for some people too bright in a room with dimmed light. Oh well: tape it over and don’t look at it anymore.

The LHY LPS-25 on the inside

On the inside, the LHY LPS-25 looks very tidy. We see a familiar Talema transformer. Next to it a large diode rectifier on a cooling fin. Furthermore, the step-down to 5 volts and the necessary caps to filter out some left over noise. It looks like a fairly simple design, but the execution is neat.