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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RS Stock No. 771-9388
Brand :RS PRO
THB382.27
Each
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5V dc - 200mA 1W 120 → 430 V dc, 85 → 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 751-1419
Brand :RS PRO
THB1,519.84
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12V dc - 2.5A 30W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 771-9401
Brand :RS PRO
THB348.91
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5V dc - 400mA 2W 120 → 430 V dc, 85 → 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 667-5760
Brand :RS PRO
THB437.39
Each
Units
5V dc - 600mA 3W 110 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 711-2627
Brand :RS PRO
THB1,670.84
Each
Units
24V dc - 1.5A 36W 88 → 264V ac 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 180g
RS Stock No. 771-8540
Brand :RS PRO
THB2,494.68
Each
Units
12V dc - 8.5A 102W 88 → 264V ac 1 Chassis Mount Enclosed 158mm 97mm 38mm - - 520g
RS Stock No. 671-6717
Brand :RS PRO
THB715.42
Each
Units
24V dc - 450mA 10W 120 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 53.5mm 28.5mm 19mm - - 50g
RS Stock No. 667-5776
Brand :RS PRO
THB437.39
Each
Units
24V dc - 125mA 3W 110 → 370 V dc, 85 → 264 V ac 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 771-9414
Brand :RS PRO
THB375.40
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Units
12V dc - 167mA 2W 120 → 430 V dc, 85 → 305 V ac 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 161-8215
Brand :RS PRO
THB457.60
Each
Units
12V dc - 2.1A 25.2W 88 264V ac 1 Chassis Mount Enclosed 850mm 58.5mm 36.5mm - - 250g
RS Stock No. 161-8221
Brand :RS PRO
THB2,471.08
Each
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24V dc - 8.4A 200W 120 370 V dc, 85 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8226
Brand :RS PRO
THB2,441.16
Each
Units
24V dc - 10A 240W 85 264V ac 1 Chassis Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8216
Brand :RS PRO
THB455.40
Each
Units
15V dc - 1.7A 25.5W 88 264V ac 1 Chassis Mount Enclosed 85mm 58.5mm 36.5mm - - 250g
RS Stock No. 144-6284
Brand :RS PRO
THB867.83
Each
Units
5V dc - 2.8A 14W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 70mm 48mm 23.5mm - - 85g
RS Stock No. 181-2199
Brand :RS PRO
THB268.00
Each
Units
3V dc - 1A 3.3W 100 370 V dc, 85 264 V ac 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS Stock No. 161-8238
Brand :RS PRO
THB5,357.06
Each
Units
48V dc - 10.5A 504W 88 264V ac 1 Chassis Mount Enclosed 183mm 120mm 83.5mm - - -
RS Stock No. 161-8276
Brand :RS PRO
THB468.15
Each
Units
36V dc - 1A 36W - 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 161-8260
Brand :RS PRO
THB2,166.17
Each
Units
24V dc - 5.2A 124.8W 90 264V ac 1 Chassis Mount Open Frame 127mm 76mm 30.5mm - - -
RS Stock No. 161-8222
Brand :RS PRO
THB2,471.08
Each
Units
36V dc - 5.6A 200W 120 370 V dc, 85 264 V ac 1 PCB Mount Enclosed 199mm 99mm 50mm - - -
RS Stock No. 161-8217
Brand :RS PRO
THB455.40
Each
Units
24V dc - 1.1A 26W 88 264V ac 1 Chassis Mount Enclosed 85mm 58.5mm 36.5mm - - 250g
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