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 192-1245
製造零件編號LPQ252-C
HK$3,366.09
單位
±12 V dc, 5 V dc - 6 A, 10 A, 35 A 250W 4 85 → 264 V ac, 120 → 300 V dc Chassis Mount Enclosed 262mm 127mm 76.2mm 1.4kg 75% +50°C
RS庫存編號 289-5046
製造零件編號LPQ154-C
HK$2,308.59
單位
±12 V dc, 5 V dc - 2.5 A, 4.5 A, 8 A, 22 A 110W 4 85 → 132 V ac, 170 → 264 V ac, 220 → 300 V dc Chassis Mount Enclosed 216mm 108mm 38.1mm 800g 75% +50°C
RS庫存編號 183-0010
製造零件編號LPT42
HK$393.40
單位
±12 V dc, 5 V dc - 2.5 A, 5 A, 700 mA 40W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°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 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 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 629-5787
製造零件編號NLP65-9608GJ
HK$616.39
單位
±12 V dc, 5 V dc - 2.5 A, 7.5 A, 650 mA 65W 3 85 → 264V ac Chassis Mount Open Frame 127mm 76.2mm 32mm 283g 72% +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 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 192-1122
製造零件編號LPT25
HK$523.20
單位
±15 V dc, 5 V dc - 2 A, 4 A, 700 mA 25W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°C
RS庫存編號 192-1043
製造零件編號LPS22
HK$357.38
單位
5 V dc - 8A 25W 1 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°C
RS庫存編號 192-1267
製造零件編號LPS255-C
HK$2,701.99
單位
24 V dc - 10.4A 250W 1 85 → 264 V ac, 120 → 300 V dc Chassis Mount Enclosed 262mm 127mm 76.2mm 1.2kg 75% +50°C
RS庫存編號 192-1100
製造零件編號LPT23
HK$372.93
單位
±12 V dc, 5 V dc - 5 A, 700 mA 25W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°C
RS庫存編號 629-5579
製造零件編號NFS40-7605J
HK$452.71
單位
5.1 V dc - 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 751-1554
製造零件編號NPS42-M
HK$181.94
單位
5 V dc - 11A 40W 1 90 → 264 V ac, 127 → 300 V dc Chassis Mount Open Frame 101.6mm 50.8mm 25.4mm 118g - +50°C
RS庫存編號 183-0004
製造零件編號LPS45
HK$474.70
單位
24 V dc - 2.3A 40W 1 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°C
RS庫存編號 751-1591
製造零件編號LPT103-M
HK$693.18
單位
±15 V dc, 5 V dc - 1.5 A, 7.2 A, 18 A 80W 3 90 → 264V ac Chassis Mount Open Frame 101.6mm 50.8mm 32.7mm 200g - +50°C
RS庫存編號 461-812
製造零件編號AIF04ZPFC-01L
HK$2,379.04
單位
380 V dc - 4.2A 1.6kW 1 85 → 264 V ac, 120 → 370 V dc PCB Mount Encapsulated 116.8mm 61mm 13.95mm 300g 95% +100°C
RS庫存編號 183-0054
製造零件編號LPT45
HK$540.67
單位
±15 V dc, 5 V dc - 2.5 A, 5 A, 700 mA 40W 3 85 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 127mm 76.2mm 29mm 230g 70% +50°C
RS庫存編號 751-1605
製造零件編號NPT42-M
HK$281.58
單位
±12 V dc, 5 V dc - 3 A, 8 A, 700 mA 45W 3 90 → 264 V ac, 120 → 300 V dc Chassis Mount Open Frame 101.6mm 50.8mm 28mm 140g - +50°C