LED power supplies

The ERPF-400-24 Mean Well power supply features a 24V DC output with a 16.7A current, supporting AC inputs from 90 to 264V, with reduced power output between 90-200V. It's housed in a metal case with a perforated lid, offering voltage adjustment and active PFC. Testing revealed stable output voltage, low noise, and adequate dynamic performance. Build quality is decent, but compound application has gaps, affecting moisture protection. The unit operates safely up to 100% load, requiring added water protection for outdoor use.

We teardown and tested RS-150-24 from Mean Well (150W) in different modes. It's a 24V power supply with a 6.3A current limit and dual AC input ranges. It lacks PFC and thermal protection and operates with passive cooling. Tests show stable and low-noise output voltage. The unit heats significantly at full load, suggesting a safe operational limit of 70-80% load to prevent overheating and potential hazards. Overload protection is in "hiccup mode."

In this post, I want to share a subjective and perhaps picky view about the LRS-200, and LRS-350 sources as a person, a user, not as a professional.

Building a custom controlled resistive load: a comprehensive guide to overcoming the limitations of commercial test devices for power supply testing using Raspberry PI and DIY electronic circuit design

RSP-150-24 is a 150W single output enclosed type AC/DC power supply. This series operates for 85~264VAC input voltage and offers the models with the DC output mostly demanded from the industry.

We teardown and tested in different modes LRS-75-24 power supply from Mean Well. It's a 75W single-output enclosed power supply with a low-profile 1 1/5" design. The device has extremely low no-load power consumption (less than 0.3W).

This simple and inexpensive unit will help test various devices; with it, one can determine the power factor of the AC grid draw, power-on and power-off times, etc.

We teardown and tested in different modes RSP-320-24 power supply from Mean Well. It's a 24-volt power supply with a maximum current of 13.4 amps. The supported mains voltage is from 88 to 264 volts without an additional switch.

What characteristics are important? What do the characteristics mean? How to measure parameters cheaply?

We teardown and tested in different modes LRS-150-24 power supply from Mean Well. It's a 150W single-output enclosed-type power supply with a 1 3/16" low-profile design. Adopting the input of 115VAC, the power supply provides an output voltage line of 24V DC.