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 103-4671
製造零件編號RPS-30-12
BrandMean Well
HK$151.32
單位
12 V dc - 2.5A 30W 80 → 264V ac 1 PCB Mount Open Frame 76.2mm 50.8mm 24mm - - 90g
RS庫存編號 621-0584
製造零件編號RS-25-24
BrandMean Well
HK$119.68
單位
24 V dc - 1.1A 26W 88 → 264 V ac, 125 → 373 V dc 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 200g
RS庫存編號 644-8408
製造零件編號SP-200-5
BrandMean Well
HK$548.31
單位
5 V dc - 40A 200W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 199mm 99mm 50mm - - 850g
RS庫存編號 405-0582
製造零件編號LDA15F-5-SN
BrandCosel
HK$331.00
單位
5 V dc - 3A 15W 85 → 264 V ac, 110 → 370 V dc 1 Chassis Mount Enclosed 145mm 57mm 32mm - - 95g
RS庫存編號 259-849
製造零件編號JWS 150 12A HFP
BrandTDK-Lambda
HK$1,584.10
單位
12 V dc - 13A 150W 85 → 265 V ac, 120 → 330 V dc 1 Chassis Mount Enclosed 198mm 92mm 65mm - - 850g
RS庫存編號 664-1509
製造零件編號TMP 30212C
BrandTRACOPOWER
HK$753.36
單位
±12 V dc - 1.3A 30W 85 → 264 V ac, 120 → 370 V dc 2 Chassis Mount Encapsulated 112mm 63.8mm 25.6mm - - 191g
RS庫存編號 644-8060
製造零件編號RD-125B
BrandMean Well
HK$371.14
單位
5/24 V dc - 4.6A 133W 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc 2 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS庫存編號 122-7077
製造零件編號ECM60UD21
BrandXP Power
HK$410.70
單位
5/12 V dc - 3 A, 8 A 60W 90 → 264 V ac, 120 → 370 V dc 2 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS庫存編號 122-7657
製造零件編號ECE10US12
BrandXP Power
HK$194.98
單位
12 V dc - 830mA 10W 85 → 264 V ac, 120 → 370 V dc 1 PCB Mount Encapsulated 38.1mm 25.4mm 15.24mm - - 24g
RS庫存編號 413-661
製造零件編號RT-85D
BrandMean Well
HK$523.12
單位
5/12/24 V dc - 6/1/2A 90W 88 → 264 V ac, 125 → 373 V dc 3 Chassis Mount Enclosed 159mm 97mm 38mm - - 600g
RS庫存編號 721-1636
製造零件編號HRP-100-24RS
BrandMean Well
HK$455.06
單位
24 V dc - 4.5A 108W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 159mm 97mm 38mm - - 380g
RS庫存編號 106-5830
製造零件編號LRS-50-12RS
BrandMean Well
HK$129.78
單位
12 V dc - 4.2A 50W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
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 85 → 264 V ac, 120 → 300 V dc 1 Chassis Mount Enclosed 262mm 127mm 76.2mm - - 1.2kg
RS庫存編號 122-7038
製造零件編號ECM100US03
BrandXP Power
HK$567.77
單位
3.3 V dc - 20A 100W 90 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Open Frame 114.3mm 63.5mm 27mm - - 180g
RS庫存編號 150-837
製造零件編號RSP-1000-27
BrandMean Well
HK$2,673.03
單位
27 V dc - 37A 999W 90 → 264 V ac, 127 → 370 V dc 1 Chassis Mount Enclosed 295mm 127mm 41mm - - 2kg
RS庫存編號 627-3800
製造零件編號XG2
BrandExcelsys
HK$1,215.64
單位
6 V dc - 40A 200W 85 → 264 V ac, 120 → 380 V dc 1 Chassis Mount Enclosed 269.75mm 127mm 40.4mm - - 100g
RS庫存編號 192-1043
製造零件編號LPS22
HK$251.73
單位
5 V dc - 8A 25W 85 → 264 V ac, 120 → 300 V dc 1 Chassis Mount Open Frame 127mm 76.2mm 29mm - - 230g
RS庫存編號 424-291
製造零件編號HRP-150-5
BrandMean Well
HK$593.59
單位
5 V dc - 26A 130W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 159mm 97mm 38mm - - 610g
RS庫存編號 678-3837
製造零件編號SP-320-36
BrandMean Well
HK$768.47
單位
36 V dc - 8.8A 316.8W 88 → 264 V ac, 124 → 370 V dc 1 Chassis Mount Enclosed 215mm 115mm 50mm - - 1.1kg
RS庫存編號 177-876
製造零件編號HWS1500-48
BrandLambda
HK$10,833.45
單位
48 V dc - 32A 1.5kW 85 → 265 V ac, 120 → 330 V dc 1 Chassis Mount Enclosed 11in 3.25in 5in - - 3.8kg