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 705-9753
製造零件編號HRP-75-36RS
BrandMean Well
HK$353.52
單位
36 V dc - 2.1A 75.6W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Enclosed 129mm 98mm 38mm 470g 89% +70°C
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 1 76 → 264 V ac, 88 → 132 V ac, 248 → 273 V dc Chassis Mount Enclosed 7.8in 3.9in 1.5in 700g 87% +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
RS庫存編號 644-8212
製造零件編號SP-320-48
BrandMean Well
HK$766.08
單位
48 V dc - 6.7A 321.6W 1 88 → 264 V ac, 124 → 370 V dc Chassis Mount Enclosed 215mm 115mm 50mm 1.1kg 89% +65°C
RS庫存編號 644-7017
製造零件編號RS-100-48
BrandMean Well
HK$210.91
單位
48 V dc - 2.3A 110W 1 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 159mm 97mm 38mm 600g 84% +70°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 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 739-7979
製造零件編號LS200-24
BrandTDK-Lambda
HK$514.10
單位
24 V dc - 8.4A 200W 1 85 → 264 V ac, 120 → 373 V dc Chassis Mount Enclosed 210mm 98mm 41mm 700g 84% +70°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 413-611
製造零件編號RT-65D
BrandMean Well
HK$182.97
單位
5 V dc, 12 V dc, 24 V dc - 1 A, 1.5 A, 4 A 68W 3 88 → 264 V ac, 125 → 373 V dc Chassis Mount Enclosed 129mm 98mm 38mm 440g 79% +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 200-162
製造零件編號NV1-4G5FF
BrandTDK-Lambda
HK$1,939.02
單位
±15 V dc, ±24 V dc, 5 V dc - 1 A, 5 A, 7.5 A, 8 A 180W 4 90 → 264V ac Chassis Mount Open Frame 5in 3in 1.25in 250g - +70°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 122-7684
製造零件編號ECE60US09
BrandXP Power
HK$680.86
單位
9 V dc - 6.67A 60W 1 85 → 264 V ac, 120 → 370 V dc PCB Mount Encapsulated 91.4mm 38.1mm 28mm 191g 87% +70°C
RS庫存編號 829-6745
製造零件編號LFA150F-24
BrandCosel
HK$692.41
單位
24 V dc - 6.3A 151W 1 85 → 264V ac Chassis Mount Open Frame 188mm 47mm 85mm 390g 87.5% +70°C
RS庫存編號 644-8290
製造零件編號PSP-600-48
BrandMean Well
HK$1,152.57
單位
48 V dc - 12.5A 600W 1 88 → 264 V ac, 124 → 370 V dc Chassis Mount Enclosed 170mm 120mm 93mm 1.9kg 87% +60°C
RS庫存編號 413-639
製造零件編號RT-125D
BrandMean Well
HK$300.54
單位
5 V dc, 12 V dc, 24 V dc - 2 A, 3 A, 8 A 136W 3 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc Chassis Mount Enclosed 199mm 98mm 38mm 700g 82% +70°C
RS庫存編號 183-0098
製造零件編號LPS65
HK$603.41
單位
24 V dc - 2.5A 60W 1 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 106-5832
製造零件編號LRS-50-24
BrandMean Well
HK$104.00
單位
24 V dc - 2.2A 52.8W 1 85 → 264 V ac, 120 → 373 V dc Chassis Mount Enclosed 99mm 82mm 30mm 230g 88% +70°C
RS庫存編號 777-3106
製造零件編號EPS-15-12
BrandMean Well
HK$75.18
單位
12 V dc - 1.25A 15W 1 85 → 264 V ac, 120 → 370 V dc Chassis Mount Open Frame 63.5mm 45.7mm 24mm 57g 82% +70°C