DESKTOP POWER SUPPLIES

Desktop Power Supplies from APS

 
Desktop Power Supplies are a type of external power supply, enclosed in a non-flammable plastic enclosure with a removable AC cable and a DC output lead to connect to the device being powered.  These external Power Supplies feature Universal AC Input for operation over a 90~264VAC range typically any AC source available around the globe.  All APS power supplies have been qualified to meet internation safety standards for ITE / Industrial applications (IEC/EN/UL 62368-1) and/or Medical application (IEC/EN/UL 60601-1).  Additional standards regarding no-load input-power limits and operational efficiency have been adopted over the years and all APS power Supplies comply with DoE (Level VI) | EU ErP 5 standards ensuring devices comply with any energy standard established around the globe.

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Common names other than Desktop Power Supplies include power brick and power adapter. Products for battery-powered equipment may be described as chargers or rechargers. These products are used with devices that cannot afford the size / heat or safety compliance challenges required of internal or embedded power conversion. These products are used in both equipment with no other source of power and with battery-powered equipment, where the supply, when plugged in, can sometimes charge the battery in addition to powering the equipment.

Use of an external power supply allows portability of equipment powered either by mains or battery without the added bulk of internal power components, and makes it unnecessary to produce equipment for use only with a specified power source; the same device can be powered from 120 VAC or 230 VAC mains, vehicle or aircraft battery by using a different adapter.

Advantages:

• Safety – External power supplies can free product designers from safety issues. Most devices utilize voltages less than 56 VDC which meet SELV standards, making the device safe and freeing it from compliance to products that draw power from AC Mains, which are considered unsafe.
• Heat reduction – Converting AC voltage to a DC Voltage required by devices for operation consumes space and generates heat.  External power supplies allow for device miniaturization and keeps the generated heat out of the device, improving reliability and longevity of the device.
• Electrical noise reduction – Power Conversion from switching power supplies can generate unwanted EMI / radiated noise. External power supplies keep potential noise from entering the device, providing only a clean DC voltage to the device.
• Ease of replacement – These power supplies  can be replaced quickly by a user without the need to have the powered device repaired.