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庫存編號 706-6151
製造零件編號TML 20512C
BrandTRACOPOWER
HK$610.95
單位
±12 V dc, 5 V dc - 2.8 A, 250 mA 20W 3 90 → 264 V ac, 100 → 375 V dc Chassis Mount Encapsulated 96mm 54.6mm 27.6mm 155g 75 → 84% +60°C
RS庫存編號 106-5847
製造零件編號LRS-100-36
BrandMean Well
HK$146.49
單位
36 V dc - 2.8A 100.8W 1 85 → 264 V ac, 120 → 373 V dc Chassis Mount Enclosed 129mm 97mm 30mm 340g 90.5% +70°C
RS庫存編號 777-2862
製造零件編號RSP-320-36
BrandMean Well
HK$456.19
單位
36 V dc - 8.9A 320W 1 88 → 264 V ac, 124 → 370 V dc Chassis Mount Enclosed 215mm 115mm 30mm 900g 89.5% +70°C
RS庫存編號 644-6935
製造零件編號RS-25-5
BrandMean Well
HK$89.90
單位
5 V dc - 5A 25W 1 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 78mm 51mm 28mm 200g 78.5% +70°C
RS庫存編號 833-8154
製造零件編號MAP55-4002
HK$3,884.34
單位
±12 V dc, 5 V dc - 3 A, 6 A, 500 mA 55W 4 90 → 132 V ac, 175 → 264 V ac U Bracket U Bracket 152.4mm 83.1mm 40.6mm 550g 73 (Min.)% +70°C
RS庫存編號 455-7853
製造零件編號LPS172-C
HK$1,997.20
單位
5 V dc - 35A 110W 1 85 → 264 V ac, 120 → 300 V dc Chassis Mount Enclosed 216mm 108mm 38.1mm 850g 75% +50°C
RS庫存編號 414-046
製造零件編號SP-150-5
BrandMean Well
HK$591.50
單位
5 V dc - 30A 150W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Enclosed 199mm 99mm 50mm 760g 75% +60°C
RS庫存編號 892-0630
製造零件編號TMPS 05-105
BrandTRACOPOWER
HK$160.13
單位
5 V dc - 1.3A 5W 1 85 → 264V ac Through Hole Encapsulated 25.4mm 25.4mm 15.3mm - 81% +70°C
RS庫存編號 489-8592
製造零件編號PBA75F-5-N
BrandCosel
HK$867.14
單位
5 V dc - 15A 75W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Enclosed 151.5mm 82.5mm 35.5mm 350g 83% +71°C
RS庫存編號 183-0111
製造零件編號LPT62
HK$464.65
單位
±12 V dc, 5 V dc - 1 A, 3.5 A, 8 A 60W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 42.9mm 340g 70% +50°C
RS庫存編號 777-3109
製造零件編號EPS-15-5
BrandMean Well
HK$75.18
單位
5 V dc - 3A 15W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Open Frame 63.5mm 45.7mm 24mm 57g 78% +70°C
RS庫存編號 489-8542
製造零件編號PBA50F-5-N
BrandCosel
HK$755.76
單位
5 V dc - 10A 50W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Enclosed 136.5mm 82.5mm 34.5mm 280g 82% +71°C
RS庫存編號 644-8177
製造零件編號SP-320-24
BrandMean Well
HK$889.57
單位
24 V dc - 13A 312W 1 88 → 264 V ac, 124 → 370 V dc Chassis Mount Enclosed 215mm 115mm 50mm 1.1kg 87% +65°C
RS庫存編號 122-7095
製造零件編號ECP225PS12-A
BrandXP Power
HK$1,081.07
單位
12 V dc - 18.75A 225W 1 80 → 264V ac Chassis Mount Open Frame 127mm 76.2mm 22.6mm 230g - +70°C
RS庫存編號 833-8170
製造零件編號MAP80-4002
HK$6,459.42
單位
±12 V dc, 5 V dc - 1 A, 4 A, 14 A 80W 4 90 → 132 V ac, 175 → 264 V ac U Bracket U Bracket 182.9mm 106.7mm 45.7mm 820g 80% +70°C
RS庫存編號 243-2083
製造零件編號LPT65
HK$544.18
單位
5 V dc, 12 V dc, 24 V dc - 1 A, 2 A, 8 A 60W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 42.9mm 340g 70% +50°C
RS庫存編號 721-1746
製造零件編號ELP-75-5RS
BrandMean Well
HK$266.62
單位
5 V dc - 15A 75W 1 90 → 264 V ac, 127 → 370 V dc Chassis Mount Open Frame 175mm 60mm 27mm 250g 82% +70°C
RS庫存編號 629-5620
製造零件編號NFS40-7624J
HK$415.38
單位
24 V dc - 1.6A 40W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Open Frame 5in 3in 1.2in 280g 70% +70°C
RS庫存編號 106-5843
製造零件編號LRS-100-5
BrandMean Well
HK$156.88
單位
5 V dc - 18A 90W 1 85 → 264 V ac, 120 → 373 V dc Chassis Mount Enclosed 129mm 97mm 30mm 340g 86% +70°C
RS庫存編號 405-0649
製造零件編號LDA30F-15-SN
BrandCosel
HK$577.13
單位
15 V dc - 2A 30W 1 85 → 264 V ac, 110 → 370 V dc Chassis Mount Enclosed 163mm 65mm 36mm 200g 78% +60°C