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 Number of Outputs Input Voltage Mounting Type Package Type Length Width Depth Weight Efficiency Maximum Temperature
RS Stock No. 172-0781
Mfr. Part No.UCP180PS12
BrandXP Power
£80.35
Each
Units
12V dc - 10 A, 15 A 180W 1 85 → 264V ac Chassis Mount U Bracket 107.6mm 62.8mm 29.5mm 240g 92% 70°C
RS Stock No. 136-8821
Mfr. Part No.ULP40-1305
BrandEOS
£14.81
Each
Units
5V dc - 5A 25W 1 264 V ac, 390 V dc Surface Mount Open Frame 76.2mm 50.8mm 16.76mm 100g 85% +70°C
RS Stock No. 126-3509
Mfr. Part No.ZWS100BAF-5/A
BrandTDK-Lambda
£65.18
Each
Units
5V dc - 20A 100W 1 120 → 370 V dc, 85 → 265 V ac Chassis Mount Enclosed 185mm 72mm 45mm 290g 84 %, 86 % +70°C
RS Stock No. 136-8832
Mfr. Part No.MULP40-1324
BrandEOS
£28.38
Each
Units
24V dc - 1.67A 40W 1 264 V ac, 390 V dc Surface Mount Open Frame 76.2mm 50.8mm 16.76mm 100g - +70°C
RS Stock No. 813-8998
Mfr. Part No.HWS15A-3/A
BrandTDK-Lambda
£32.60
Each
Units
3.3V dc - 3A 15W 1 120 → 370 V dc, 85 → 265 V ac Chassis Mount Enclosed 82mm 26.5mm 80mm 180g 85% +50°C
New
RS Stock No. 210-9109
Mfr. Part No.HDL3000PS48
BrandXP Power
£735.00
Each
Units
- HDL3000 62.5A 3kW 1 90 → 264V ac - Enclosed - - - - - -
RS Stock No. 185-6176
Mfr. Part No.PFH-500F-28-0D0-R
BrandTDK-Lambda
£188.44
Each
Units
28V dc PHF500F 18A 504W 1 85 → 265V ac Through Hole Encapsulated 101.6mm 60.96mm 13.46mm 225g 92% +100°C
RS Stock No. 131-1679
Mfr. Part No.LFA100F-12-Y
BrandCosel
£32.88
Each
Units
12V dc - 8.5A 102W 1 85 → 264V ac Chassis Mount Open Frame 155mm 62mm 30mm 280g 84.5% +70°C
RS Stock No. 132-7440
Mfr. Part No.PMA30F-5-N
BrandCosel
£57.28
Each
Units
5V dc - 6A 30W 1 85 → 264V ac Panel Mount Enclosed 31mm 120mm 82mm 280g - +70°C
RS Stock No. 157-8377
Mfr. Part No.TPP 30-105A-J
BrandTRACOPOWER
£36.13
Each
Units
5V dc - 6A 30W 1 120 → 370 V dc, 85 → 264 V ac Chassis Mount Open Frame 84.8mm 34.6mm 19.6mm 60.5g - +85°C
RS Stock No. 183-4070
Mfr. Part No.RAC15-15SK
BrandRecom
£87.22
1 Tube of 15
Tube(s)
15V dc RAC15-K 1A 15W 1 85 → 264V ac PCB Mount - 490mm 56mm 40mm 60g 86% +85°C
RS Stock No. 180-9351
Mfr. Part No.RAC15-05SK
BrandRecom
£8.78
Each
Units
5V dc RAC15-K 3A 15W 1 85 → 264V ac PCB Mount Encapsulated 52.5mm 27.4mm 23mm 60g 84% +85°C
RS Stock No. 183-9462
Mfr. Part No.CUS1500M-48
BrandTDK-Lambda
£437.31
Each
Units
48V dc CUS1500M 32A 1.5kW 1 120 → 340 V dc, 85 → 265 V ac - Enclosed 127mm 261mm 63mm 3kg 88% +60°C
RS Stock No. 200-6186
Mfr. Part No.IRM-90-12
BrandMean Well
£20.00
Each
Units
12V IRM-90 7.37A 80W 1 80 → 305V ac - Encapsulated - - - - - -
RS Stock No. 122-7688
Mfr. Part No.ECE60US15
BrandXP Power
£38.09
Each
Units
15V dc - 4A 60W 1 120 → 370 V dc, 85 → 264 V ac PCB Mount Encapsulated 91.4mm 38.1mm 28mm 191g 88% +70°C
RS Stock No. 172-0788
Mfr. Part No.UCP180PS48
BrandXP Power
£80.35
Each
Units
48V dc - 2.5 A, 3.75 A 180W 1 85 → 264V ac Chassis Mount U Bracket 107.6mm 62.8mm 29.5mm 240g 92% 70°C
New
RS Stock No. 210-4103
Mfr. Part No.ECH450PS15
BrandXP Power
£123.00
Each
Units
15V ECH450 16.6 A, 30 A 450W 1 264V ac - Open Frame - - - - - -
RS Stock No. 203-5329
Mfr. Part No.OZ-015-5-J00-K
BrandNipron
£34.21
Each
Units
5V OZ-015 3A 15W 1 85 → 264V ac - Enclosed - - - - - -
RS Stock No. 193-323
Mfr. Part No.RAC05-12SB
BrandRecom
£34.39
Each
Units
12V dc - 420mA 5W 1 90 → 264V ac PCB Mount Encapsulated 50.8mm 25.4mm 15.16mm 30g 75% +70°C
RS Stock No. 132-7449
Mfr. Part No.PMA100F-24-N
BrandCosel
£105.96
Each
Units
24V dc - 4.5A 108W 1 85 → 264V ac Panel Mount Enclosed 34mm 168mm 93mm 625g - +70°C