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High efficiency 93% compact power supply 28V SMPS 400W for smart charger

The open frame power supply 28V 400W,the efficiency is 93%,and it is the compact power supply,the most important is that it can pass the EMC test,we test EMC by our laboratory,so it is very popular among the market.At present this power supply 400W is widely used to the smart charger and moving head lights.

  • Brand:

  • Item NO.:

  • Product Origin:

  • Shipping Port:

    Guangzhou port
  • Lead Time:

    2 days for stocks; 7-10 days for samples
Product Details

Smart charger power supply 400W 28V


400W 28V open frame power supply is 100-240vac input voltage and DC28V 14.3A output power supply with small size, high quanlity,it is used in the smart charger,electronic LED stage lights,robot and other industrial equipments.


1, high efficiency DC28V 14.3A power supply;
2, Wide range of AC input voltage,DC28V single output;
3, Over load, short circuit protection,over-temperature protection;

4, 400W 28V small size power supply with high efficiency.

            Item No. K18-UP400S12 K18-UP400S28 K18-UP400S36 K18-UP400S48

Output Voltage

+12V +28V +36V +48V

Rated Current

30A 14.3A 11A 8.5A

Current Range

0-30A 0-14.3A 0-11A 0-8.5A

Rated Power

360W 400.8W 396W 408W

Ripple & Noise

120mVp-p 280mVp-p
360mVp-p 480mVp-p

Adjustable Output Range


Output Accuracy


Line Regulation


Load Regulation


Set up,Rise,Keep up time

500ms, 50ms, 5ms/115VAC, 200ms,50ms,5ms/230VAC


Input Voltage Range

90-264V AC

Input Current

4.5A@115V AC,2A@230VAC

Input Frequency


Power Factor >0.95@110VAC; >0.95@220VAC

Efficiency @230Vac

>96% >93% >93% >93%

Inrush Current

Cold start 15A@115V,30A@230V

Leakage Current



Over Load Protection

110~160% Hiccup automatic protection

Short Circuit Protection


Over Temp., protection >120 degree,receovers automatically after the temp. goes down.


Working Temp.,Humidity

-20~60℃,10~90% RH,No condensation

Storage Temp.,Humidity

-20~85℃,10~95% RH




10~500Hz, 2G 10min /1cycle, PERIOD FOR 60min EACH AXES

Safety&EMC Standards

Safety Standards


Withstand Voltage

I/P-O/P:3KV; I/P-FG:1.5KV;O/P-FG:0.5KV DC 1min

Insulation Resistance

I/P-O/P, I/P-FG, O/P-FG:500VDC / 100M Ohms

EMC Standards


Others Dimension


Weight 0.5kg

1.All parameters 230VAC input, rated load, ambient temperature 25 ℃, measured under conditions of 70% humidity;

2. Accuracy: includes set up tolerance, line regulation, load regulation and so on;

3. Ripple Test: 30cm long strands connect the power supply and the load on the load side and 0.1u and 47u capacitor to 20MHz oscilloscope measured at the load end;

4. Line regulation: at rated load conditions, the input voltage changes from low to high measured;

5. Load regulation: the measured output load from 0 to 100% load change measured.

Product picture:

moving head lights power supply 400W

400W power supply 28V

28V switching power supply

28V dc power supply

28V open frame power supply


Q1. Can I have a sample order for power supply?
A1: Yes, we welcome sample order to test and check quality. Mixed samples are acceptable.


Q2: Do you accept OEM/ODM for the switching power supply  ?

A2: Yes. we do.


Q3:How about the quality?

A3:We have the better professional and experienced engineers team and strict QA and QC system.Repair rate under 0.1%~0.2%


Q4:What is PFC?
A4:PFC stands for Power Factor Correction. The purpose of PFC is to improve the ratio of apparent power and real power. The power factor is only 0.5~0.7 in non-PFC models. In PFC models, the power factor can reach above 0.9. The calculation formulas are as below: 
Apparent Power=Input Voltage x Input Current (VA) 

Real Power= Input Voltage x Input Current x Power Factor (W) 

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