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庫存編號 667-5786
BrandRS PRO
HK$119.91
單位
12 V dc - 420mA 5W 85 → 264 V ac, 110 → 370 V dc 1 PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm - - 35g
RS庫存編號 667-5773
BrandRS PRO
HK$98.62
單位
12 V dc - 250mA 3W 85 → 264 V ac, 110 → 370 V dc 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS庫存編號 667-5764
BrandRS PRO
HK$112.23
單位
9 V dc - 330mA 3W 85 → 264 V ac, 110 → 370 V dc 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS庫存編號 667-5760
BrandRS PRO
HK$110.82
單位
5 V dc - 600mA 3W 85 → 264 V ac, 110 → 370 V dc 1 PCB Mount Encapsulated 37mm 23mm 15mm - - 25g
RS庫存編號 751-1412
BrandRS PRO
HK$286.76
單位
24 V dc - 833mA 20W 85 → 264 V ac, 120 → 370 V dc 1 PCB Mount Encapsulated 53.5mm 28.5mm 23.5mm - - 50g
RS庫存編號 711-2602
BrandRS PRO
HK$260.66
單位
24 V dc - 900mA 21.6W 88 → 264V ac 1 Chassis Mount Enclosed 92mm 54mm 30mm - - 140g
RS庫存編號 771-9423
BrandRS PRO
HK$303.78
單位
12 V dc - 1.25A 15W 85 → 265 V ac, 120 → 375 V dc 1 PCB Mount Enclosed 76.2mm 50.8mm 22.8mm - - 160g
RS庫存編號 771-9385
BrandRS PRO
HK$62.48
單位
24 V dc - 125mA 3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS庫存編號 711-2595
BrandRS PRO
HK$260.66
單位
5 V dc - 4A 20W 88 → 264V ac 1 Chassis Mount Enclosed 92mm 54mm 30mm - - 140g
RS庫存編號 671-6704
BrandRS PRO
HK$182.86
單位
12 V dc - 900mA 10W 85 → 264 V ac, 120 → 370 V dc 1 PCB Mount Encapsulated 53.5mm 28.5mm 19mm - - 50g
RS庫存編號 771-9379
BrandRS PRO
HK$70.07
單位
5 V dc - 500mA 3W 85 → 264 V ac, 100 → 400 V dc 1 PCB Mount Ultra-Miniature 35mm 24mm 11mm - - -
RS庫存編號 771-8540
BrandRS PRO
HK$560.56
單位
12 V dc - 8.5A 102W 88 → 264V ac 1 Chassis Mount Enclosed 158mm 97mm 38mm - - 520g
RS庫存編號 181-2136
BrandRS PRO
HK$608.81
毎管:13 個
Tube(s)
12 V dc - 250mA 3W 85 → 264 V ac, 100 → 370 V dc 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS庫存編號 751-1419
BrandRS PRO
HK$331.57
單位
12 V dc - 2.5A 30W 85 → 265V ac 1 PCB Mount Enclosed 89mm 63.5mm 25mm - - 250g
RS庫存編號 181-2137
BrandRS PRO
HK$608.81
毎管:13 個
Tube(s)
15 V dc - 200mA 3W 85 → 264 V ac, 100 → 370 V dc 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS庫存編號 144-6273
BrandRS PRO
HK$633.07
單位
12 V dc - 3.333A 40W 264 V ac, 370 V dc 1 Chassis Mount Encapsulated 135mm 70mm 33.5mm - - 310g
RS庫存編號 916-3920
BrandRS PRO
HK$382.03
單位
12 V dc - 10A 120W 100 → 240V ac 9 Wall Mount Enclosed 250mm 215mm 59mm - - 1.9kg
RS庫存編號 181-2138
BrandRS PRO
HK$608.81
毎管:13 個
Tube(s)
24 V dc - 125mA 3W 85 → 264 V ac, 100 → 370 V dc 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g
RS庫存編號 144-6281
BrandRS PRO
HK$160.05
單位
5 V dc - 1A 5W 264 V ac, 370 V dc 1 PCB Mount Encapsulated 53.8mm 28.8mm 19mm - - 43g
RS庫存編號 181-2142
BrandRS PRO
HK$673.14
毎管:13 個
Tube(s)
9 V dc - 560mA 5W 85 → 264 V ac, 100 → 370 V dc 1 PCB Mount Encapsulated 37mm 24.5mm 18mm - - 25g