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 122-7092
製造零件編號ECM60UT33
BrandXP Power
HK$448.39
單位
5/±15 V dc - 2.5 A, 8 A, 500 mA 60W 90 264 V ac, 120 370 V dc 3 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS庫存編號 489-8542
製造零件編號PBA50F-5-N
BrandCosel
HK$700.90
單位
5 V dc - 10A 50W 85 264 V ac, 120 370 V dc 1 Chassis Mount Enclosed 136.5mm 82.5mm 34.5mm - - 280g
RS庫存編號 200-162
製造零件編號NV1-4G5FF
BrandTDK-Lambda
HK$2,540.06
單位
5/±15/24 V dc - 1 A, 5 A, 7.5 A, 8 A 180W 90 264V ac 4 Chassis Mount Open Frame 5in 3in 1.25in - - 250g
RS庫存編號 413-611
製造零件編號RT-65D
BrandMean Well
HK$378.21
單位
5/12/24 V dc - 1 A, 1.5 A, 4 A 68W 88 → 264 V ac, 125 → 373 V dc 3 Chassis Mount Enclosed 129mm 98mm 38mm - - 440g
RS庫存編號 777-3109
製造零件編號EPS-15-5
BrandMean Well
HK$168.17
單位
5 V dc - 3A 15W 85 264 V ac, 120 370 V dc 1 Chassis Mount Open Frame 63.5mm 45.7mm 24mm - - 57g
RS庫存編號 705-9753
製造零件編號HRP-75-36RS
BrandMean Well
HK$489.06
單位
36 V dc - 2.1A 75.6W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 129mm 98mm 38mm - - 470g
RS庫存編號 106-5843
製造零件編號LRS-100-5RS
BrandMean Well
HK$187.45
單位
5 V dc - 18A 90W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
RS庫存編號 833-8170
製造零件編號MAP80-4002
HK$6,459.42
單位
5/±12 V dc - 1 A, 4 A, 14 A 80W 90 132 V ac, 175 264 V ac 4 U Bracket U Bracket 182.9mm 106.7mm 45.7mm - - 820g
RS庫存編號 644-8290
製造零件編號PSP-600-48
BrandMean Well
HK$1,620.54
單位
48 V dc - 12.5A 600W 88 → 264 V ac, 124 → 370 V dc 1 Chassis Mount Enclosed 170mm 120mm 93mm - - 1.9kg
RS庫存編號 122-7095
製造零件編號ECP225PS12-A
BrandXP Power
HK$1,216.98
單位
12 V dc - 18.75A 225W 80 264V ac 1 Chassis Mount Open Frame 127mm 76.2mm 22.6mm - - 230g
RS庫存編號 621-0685
製造零件編號RS-150-24
BrandMean Well
HK$272.27
單位
24 V dc - 6.5A 156W 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc 1 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS庫存編號 405-0649
製造零件編號LDA30F-15-SN
BrandCosel
HK$535.24
單位
15 V dc - 2A 30W 85 264 V ac, 110 370 V dc 1 Chassis Mount Enclosed 163mm 65mm 36mm - - 200g
RS庫存編號 644-7017
製造零件編號RS-100-48
BrandMean Well
HK$287.94
單位
48 V dc - 2.3A 110W 88 → 264 V ac, 125 → 373 V dc 1 Chassis Mount Enclosed 159mm 97mm 38mm - - 600g
RS庫存編號 739-7979
製造零件編號LS200-24
BrandTDK-Lambda
HK$697.57
單位
24 V dc - 8.4A 200W 85 264 V ac, 120 373 V dc 1 Chassis Mount Enclosed 210mm 98mm 41mm - - 700g
RS庫存編號 122-7584
製造零件編號ECP130PS12
BrandXP Power
HK$832.68
單位
12 V dc - 10.83A 130W 85 264V ac 1 Chassis Mount Open Frame 76.2mm 50.8mm 24.1mm - - 195g
RS庫存編號 680-2830
製造零件編號LS150-48
BrandTDK-Lambda
HK$426.58
單位
48 V dc - 3.3A 150W 76 264 V ac, 88 132 V ac, 248 273 V dc 1 Chassis Mount Enclosed 7.8in 3.9in 1.5in - - 700g
RS庫存編號 166-6756
製造零件編號RAC04-12DC/277-E
BrandRecom
HK$166.628
毎管:12 個
Tube(s)
±12 V dc - ±166mA 4W 80 305V ac 1 Surface Mount Encapsulated 36.7mm 27.2mm 17.1mm - - 41g
RS庫存編號 764-7108
製造零件編號MSP-300-24
BrandMean Well
HK$2,879.91
單位
24 V dc - 14A 336W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 199mm 105mm 41mm - - 950g
RS庫存編號 413-639
製造零件編號RT-125D
BrandMean Well
HK$399.60
單位
5/12/24 V dc - 2 A, 3 A, 8 A 136W 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc 3 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS庫存編號 848-1851
製造零件編號GLC40AG
HK$1,075.70
單位
5.1/±12 V dc - - 40W 90 264V ac 3 Chassis Mount Open Frame - - - - - -