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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Description Price Output Voltage Series Output Current Power Rating Input Voltage Number of Outputs Mounting Type Package Type Length Width Depth Ripple And Noise Load Regulation Weight
RS Stock No. 786-4725
BrandRS PRO
MYR55.21
Each
units
3.3 V dc - 1A 3.3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 42mm 11mm 24mm - - -
RS Stock No. 771-9376
BrandRS PRO
MYR41.52
Each
units
12 V dc - 250mA 3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 786-4729
BrandRS PRO
MYR55.21
Each
units
5 V dc - 1A 5W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 667-5767
BrandRS PRO
MYR59.46
Each
units
3.3 V dc - 700mA 2.3W 85 → 264 V ac, 110 → 370 V dc 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS Stock No. 786-4735
BrandRS PRO
MYR58.19
Each
units
15 V dc - 340mA 5W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 42mm 11mm 24mm - - -
RS Stock No. 786-4744
BrandRS PRO
MYR55.21
Each
units
24 V dc - 210mA 5W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 786-4731
BrandRS PRO
MYR56.04
Each
units
12 V dc - 420mA 5W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Encapsulated 42mm 11mm 24mm - - 10g
RS Stock No. 711-2611
BrandRS PRO
MYR195.88
Each
units
5 V dc - 6A 30W 88 → 264V ac 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 180g
RS Stock No. 771-9366
BrandRS PRO
MYR31.23
Each
units
12 V dc - 83.3mA 1W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Miniature 35mm 24mm 11mm - - -
RS Stock No. 771-9379
BrandRS PRO
MYR37.60
Each
units
5 V dc - 500mA 3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 771-9372
BrandRS PRO
MYR37.60
Each
units
9 V dc - 333mA 3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 771-9401
BrandRS PRO
MYR45.91
Each
units
5 V dc - 400mA 2W 85 → 305 V ac, 120 → 430 V dc 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 771-9414
BrandRS PRO
MYR51.03
Each
units
12 V dc - 167mA 2W 85 → 305 V ac, 120 → 430 V dc 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 771-9385
BrandRS PRO
MYR37.60
Each
units
24 V dc - 125mA 3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS Stock No. 751-1415
BrandRS PRO
MYR204.58
Each
units
5 V dc - 6A 30W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS Stock No. 771-9408
BrandRS PRO
MYR18.77
Each
units
3.3 V dc - 600mA 2W 85 → 305 V ac, 120 → 430 V dc 1 PCB Mount Encapsulated 33.7mm 22.2mm 18mm - - 20g
RS Stock No. 161-8279
BrandRS PRO
SGD25.97
Each
units
12 V dc - 4.2A 50W 100 → 240V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS Stock No. 161-8243
BrandRS PRO
MYR19.22
Each
units
24 V dc - 27A 799W 90 → 264V ac 1 Chassis Mount Enclosed 226mm 116.5mm 41mm - - -
RS Stock No. 161-8298
BrandRS PRO
SGD26.34
Each
units
15 V dc - - 150W 85 → 132 V ac, 170 → 264 V ac 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 480g
RS Stock No. 181-2125
BrandRS PRO
MYR53.30
Each
units
12 V dc - 1.66A 20W 85 → 264 V ac, 100 → 370 V dc 1 PCB Mount Encapsulated 53.8mm 28.8mm 23.5mm - - 60g