Cincon - AC-DC Open-frame Power Supply
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Choosing the Right PSU Matters

AC-DC power supplies are essential in many end applications as major power supply units (PSUs). More and more, power supply manufacturers provide a wide variety of options to engineers. While some PSUs may be suitable to your device, others may not due to the design of the PSU. Therefore, selecting the right PSU for your specific requirement is an important factor in the success of your project.

  1. Class I or Class II for your system
  2. Heat dissipation to the power supply

Class I or Class II for Your Application?

The PSU is the key component in making your device work. The first thing to determine is if your end application has a ground (earth) connection.

If the system design of the device includes a ground connection, a Class I power supply is the correct choice. If the design does not include a ground connection, a Class II power supply is the best option. The EMC testing result is deeply affected by the choice of the power supply, making it a critical factor during the selection process.

In many cases, when an end application is a portable device, it’s common for a Class II power supply to be selected. The reason for choosing a Class II power supply is due to the increased uncertainty surrounding the AC power source in these types of devices; there is limited knowledge of the AC source’s connection with the ground. In other cases, Class I power supplies are chosen.

For the user’s convenience, unlike many power supplies which only have one version, Cincon also developed several series which can be used as either Class I or Class II with more options under development.

Series Output Power Input Voltage (VAC) Output Voltage (Vdc) Efficiency Package / Dimension (inches) Application
CFM130M 130W 80-264V 12V, 24V, 36V, 48V Up to 94% 3.000x2.000x1.20 (Open-frame) 3.598x2.000x1.299 (Baseplate) 3.598x2.520x1.358 (Cover) Medical
CFM150S 150W 90-264V 12V, 24V, 28V, 36V, 48V Up to 94% 4.00x2.00x1.283 (Open-frame) 4.598x2.00x1.362 (Baseplate) ITE/Industrial
CFM200M 200W 90-264V 12V, 24V, 48V Up to 93.5% 4.000x2.000x1.480 (Baseplate) 4.606x2.441x1.594 (Cover) Medical

Cincon Blog Technical
Furthermore, Cincon also points out the “must-have” clearance as the reminder required by the safety standard.

Cincon Blog Technical

Heat Dissipation to The Power Supply

While choosing an open-frame supply, you may need to determine the ambient temperature of the surrounding area of the power supply, i.e. the temperature inside the end application.

The heat dissipation solution has a direct influence on the life of the power supply as well as its output power. The higher the temperature, the lower the output power and lifetime. The matrix below shows the lifetime of core components of CFM130M under 25ºC & 40ºC. The higher the ambient temperature, the greater the decrease of the power supply’s lifetime.

Cincon Blog Technical
Common solutions for heat dissipation are natural convection, fan-cooling or both. In some end applications, an engineer may face the dilemma that he/she prefers the fanless solution. However, the temperature generated by the power supply may be too high without a fan.

To solve this problem, Cincon provides a baseplate-cooling design as the alternative to the fanless solution, as shown in the derating curve. The purple line shows the CFM130M without the baseplate only has 100W output power, but the blue line shows the series with the baseplate has a higher output power of 110W. The baseplate directs the heat to the case of the device, and this reduces the temperature of the power supply resulting in higher output performance.

Cincon Blog Technical

Series Output Power Input Voltage (VAC) Output Voltage (Vdc) Efficiency Package / Dimension (inches) Application
CFM130M 130W 80-264V 12V, 24V, 36V, 48V Up to 94% 3.000x2.000x1.20 (Open-frame) 3.598x2.000x1.299 (Baseplate) 3.598x2.520x1.358 (Cover) Medical
CFM150S 150W 90-264V 12V, 24V, 28V, 36V, 48V Up to 94% 4.00x2.00x1.283 (Open-frame) 4.598x2.00x1.362 (Baseplate) ITE/Industrial
CFM200M 300W 90-264V 12V, 24V, 36V, 48V Up to 94% 5.000x3.000x1.421 (Baseplate) 5.355x3.425x1.591 (Cover) ITE/Industrial
CFM300M 300W 90-264V 12V, 24V, 36V, 48V Up to 94% 5.000x3.000x1.421 (Baseplate) 5.355x3.425x1.591 (Cover) Medical

Featured Cincon AC-DC Open-Frame Power Supplies in Stock at Sager:

CFM130M Series 

Datasheet

Product Catalog

130Watts AC-DC 2”x3” Medical Open Frame Baseplate-cooled Power Supply

  • Universal Input 80-264Vac
  • 2”x 3” Open Frame Compact Size
  • 100W with Natural Convection
  • 130W with Fan-Cooled
  • No Load Input Power Consumption<150mW
  • Active PFC Function
  • High Efficiency up to 94%
  • Continuous Short Circuit Protection
  • Meets 2 MOPP IEC/EN60335-1
  • EMI Safety Meets Class I & Class II
  • Operating Altitude 5000m

 

Cincon CMF130M Series AC-DC Power Supply
 

CFM150M Series

Datahseet

Product Catalog

 

150Watts AC-DC 3’’x5’’ Medical & ITE Open Frame Power Supply

  • Universal Input 90 – 264VAC
  • 3″ x 5″ Size
  • Active PFC Meet EN61000-3-2
  • UL60601-1 and IEC/EN60601-1 Approved
  • UL60950-1 and IEC/EN60950-1 Approved
  • Meet 2 MOPP
  • No Load Power Consumption < 0.5W
  • Short Circuit Protection
  • Over Voltage Protection
  • Meet EN55011 and EN55022 Class B
  • Efficiency 93%
 Cincon CFM150M Series AC-DC Power Supply
 

CFM200M Series

Datasheet

Product Catalog

 

200Watts AC-DC 2’’x4’’ Medical Open Frame Baseplate-cooled Power Supply

  • Universal Input Range 90~264Vac
  • 2”x 4” Open Frame Compact Size
  • No Load Input Power Consumption < 0.3W
  • 12V Fan Output
  • High Efficiency up to 93.5%
  • For Class I & Class II Applications
 Cincon CMF200M Series AC-DC Power Supply

CFM300S Series

Datasheet

Product Catalog

300W AC-DC Power Supply with PFC

  • Universal Input Range 90 ~ 264Vac
  • 3″ x 5″ size
  • Active PFC Meets EN61000-3-2
  • High Efficiency up to 94%
  • High Power Density up to 18W/inch3
  • Over Temperature Protection
  • Continuous Short Circuit Protection
  • Remote Voltage Sense
  • PS On/Off Remote Control
  • Power Good & Power Fail Signal
  • 5V Stand-by Output Power
  • 12V Fan Output
  • No Load Power Consumption < 0.3W
 Cincon CFM300S Series AC-DC Power Supply

CFM300M Series

Datasheet

Product Catalog

300Watts AC-DC 3’’x5’’ Medical Open Frame Baseplate-cooled Power Supply

  • Universal Input Range 90 – 264VAC
  • Active PFC Meets EN61000-3-2
  • High Efficiency up to 94%
  • High Power Density up to 18W/Inch3
  • EN55011 and EN55022 Class B
  • 2 MOPP
  • Over Temperature Protection
  • Continuous Short Circuit Protection
  • Remote Voltage Sense
  • PS On/Off Remote Control
  • Power Good & Power Fail Signal
  • 5V Stand-by Output Power
  • 12V Fan Output
  • No Load Power Consumption < 0.3W
  • 3″ x 5″ size for Open Frame and Covered Type
 CFM300M Series AC-DC 3’’x5’’ Medical Open Frame Baseplate-cooled Power Supply

By following the two recommended tips, it will make sourcing the right open-frame power supply easier. The Sager Power Systems team of sales engineers are always available to help guide you in this process.

Visit the Cincon page on power.sager.com for more information on their offering, contact a Sager Power Systems representative, the Authorized Distributor for Cincon, at (866) 588-1750, via email at power@sager.com, or by completing the form below.