XP Power Focuses on Affordability With New PCB-mounted AC-DC Power Supplies

February 18, 2020 by Gary Elinoff

The VCE20 and VCE40 series provide 20 W or 40 W outputs at voltages ranging from 3.3 VDC to 48 VDC.

XP Power has released two new series of AC-DC power supplies that come in a low-cost, open-frame version and an encapsulated variant. All versions are designed for direct-to-PCB mounting. They also include solid PCB pins, as illustrated below.


AC-DC Power Supplies

Members of the VCE20 and VCE40 series come in open and encapsulated versions. Image used courtesy of XP Power


This feature makes it safe and easy to interface mains power directly into the PCB.


Compact Size

The 20 W VCE20 and the 40 W VCE40 come in an open-frame version and a slightly larger encapsulated version.


Size comparison of 20 W VCE20 and the 40 W VCE40


In addition, the devices feature a fuse, an EMC filter, and a hold-up capacitor. This means that no external components are required, saving scarce board space.


Wide Input and Output Ranges

All units in both series can readily work with inputs ranging from 85 VAC to 305 VAC, single phase. This feature makes the devices compatible with local voltage standards around the world.

In the tables below, both the encapsulated and open-frame versions of each series member offers the same voltage and current outputs.


VCE20 Series (Encapsulated and Open Frame)


VCE20 Series


VCE40 Series (Encapsulated and Open Frame)


VCE40 Series


Typical Efficiency of Two Series

XP Power notes a typical efficiency of 85% for all models of both series. As such, little heat is generated, obviating the need for a heat sink.

At 115 V and at full load, members of the VCE40 series draw 0.7 A and the corresponding figure for the VCE20 Series is 0.35 A.

XP Power claims a standby power draw of 300 mW.

In the image below, XP Power provides specific illustrations of efficiency for the 20 W VCE20US12-P and the VCE20US24-P.


Efficiency graphs of VCE20US12-P and VCE20US24-P

Efficiency graphs of VCE20US12-P and VCE20US24-P. Image used courtesy of XP Power


The next image graphs efficiency for the 40 W VCE40US12-P and the VCE40US24-P.


Efficiency graphs of VCE40US12-P and VCE40US24-P

Efficiency graphs of VCE40US12-P and VCE40US24-P. Image used courtesy of XP Power

Note that both of the above images feature variations by load for 115 VAC and 230 VAC.


Safety and Standards

The devices adhere to EMC standards, including EN55032 Level B Conducted & Radiated, EN601000-3-2, EN61000-3-3, and EN55024.

Safety approvals include IEC62368-1, IEC60335-1, IEC60950-1, EN62368-1, EN60335-1, UL62368-1 

All members of both series feature 3K VAC input to output isolation and a Class II rating. 

The operating temperature range is from -25℃ to +70℃.


Built for IoT and Industrial Tech

XP Power claims that these units are suited for IoT applications such as smart metering, home automation, heating, and lighting control. It might also be of use in industrial tech applications and even for set-top boxes.


Around the Industry

There are many participants in this component category.

CUI’s PSK series of encapsulated power supplies offer single outputs ranging from 3 VDC to 48 VDC. Output power ranges from 1 W to 25 W, and isolation is rated at 4,000 VAC.

Traco Power offers a wide range of encapsulated AC-DC power supplies. These units can accept AC inputs ranging from 90 VAC to 264 VAC, and can also accept 120 VDC to 370 VDC. They supply from 2 W to 100 W at a wide range of single outputs.