Embedded Switch Mode Power Supplies (SMPS)

A switch mode power supply is a type of electronic circuit used to convert power. They are also known as switching-mode power supplies or SMPS for short. The typical topology of an SMPS is AC to DC conversion, although users may find other switches that feature an output of DC to DC voltage.



How do SMPS work?


For the power supply to transform its input voltage into an output voltage, the switch will turn on and off with high frequency. The inductors or capacitors within the device will then regulate the power to the device. This continuous switching of the capacitor maintains the voltage at the desired level and provides excellent efficiency.



How do SMPS convert AC to DC?


In the case of AC mains usage, the input voltage will be filtered the same way with a capacitor or inductor to regulate the power and give you the DC output.



Which SMPS is best for a desktop PC?


The power supply unit you use in your PC is important as it ultimately determines what other components you can use within it and the output in performance you get at the end. For high-end gaming PC builds you should aim for an efficiency rating of >80%. The higher the rating, the less electricity it consumes. The less electricity used means easier heat dissipation which keeps the PC cool and performing optimally.


Switching power supply units with higher efficiency and lower levels of heat dissipation are typically compact in nature, making them ideal for projects with limited space.



Where are SMPS used?



  • PC/Laptops


  • Mobile phone chargers


  • Security systems such as CCTV Cameras


  • Machine tool industries


...
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24 V dc - 167mA 4W 1 90 → 264 V ac, 90 → 305 V ac PCB Mount Encapsulated 36.7mm 27mm 17.1mm 26g 77% +70°C
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24 V dc - 125mA 3W 1 90 → 264V ac PCB Mount Encapsulated 37.8mm 23.9mm 15.65mm 30g 78% +85°C
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12 V dc - 5A 60W 1 90 → 265 V ac, 127 → 370 V dc Chassis Mount Open Frame 101.6mm 50.8mm 30mm 145g 83% +70°C
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Tillv. art.nrRAC03-24SC
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24 V dc - 125mA 3W 1 90 → 264V ac PCB Mount Encapsulated 37.8mm 23.9mm 15.65mm 30g 78% +85°C
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3.3 V dc RAC02-GA 500mA 2W 1 85 → 264V ac PCB Mount Encapsulated 33.7mm 22.2mm 19mm 12g 63% +80°C
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±5 V dc - 400mA 4W 2 80 → 264V ac Through Hole Encapsulated 36.7mm 27.2mm 17.1mm - 76% +65°C
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12 V dc - 840mA 10W 1 85 → 305V ac PCB Mount Encapsulated 52.5mm 27.4mm 23mm 65g 84% +80°C
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12 V dc RAC20-K 1.67A 20W 1 85 → 264V ac PCB Mount - 52.5mm 27.4mm 23mm 60g 86% +85°C
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48 V dc - 1A 48W 1 90 → 264V ac Surface Mount Open Frame 101.6mm 51mm 28mm 126g 86% +60°C
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15 V dc RAC02-GA 140mA 2W 1 85 → 264V ac PCB Mount Encapsulated 33.7mm 22.2mm 19mm 12g 63% +80°C
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±5 V dc - ±600mA 6W 2 90 → 264V ac Through Hole Encapsulated 53.5mm 25.5mm 15.6mm 35g 75% +80°C
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24 V dc RAC20-K 840mA 20W 1 85 → 264V ac PCB Mount - 52.5mm 27.4mm 23mm 60g 85% +85°C
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5 V dc - 800mA 4W 1 80 → 264V ac PCB Mount Encapsulated 36.7mm 27.2mm 17.1mm - 75% +65°C
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18 V dc RAC03‿K 170mA 3W 1 85 → 264V ac PCB Mount - 28.5mm 23.5mm 17.9mm 20g 78 (Typ.)% +80°C
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3.3 V dc RAC03‿K 900mA 3W 1 85 → 264V ac PCB Mount - 28.5mm 23.5mm 17.9mm 20g 69 (Typ.)% +80°C
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12 V dc - 333mA 4W 1 80 → 305V ac Surface Mount Encapsulated 36.7mm 27.2mm 17.1mm 41g 78% +80°C
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12 V dc - 8.34A 100W 1 264 V ac, 370 V dc Surface Mount Open Frame 76.2mm 50.8mm 32mm 150g - +65°C