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 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 122-7657
製造零件編號ECE10US12
BrandXP Power
HK$200.87
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 106-5830
製造零件編號LRS-50-12RS
BrandMean Well
HK$109.36
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 338-1706
製造零件編號JWS300-12
BrandTDK-Lambda
HK$4,532.00
單位
12 V dc - 27A 324W 85 265 V ac, 120 330 V dc 1 Chassis Mount Enclosed 190mm 92mm 120mm - - 1.9kg
RS庫存編號 753-7697
製造零件編號MPS-65-13.5
BrandMean Well
HK$436.91
單位
13.5 V dc - 4.7A 63W 90 → 264 V ac, 127 → 370 V dc 1 Chassis Mount Open Frame 127mm 76mm 42mm - - 230g
RS庫存編號 817-9801
製造零件編號RAC04-3.3SC/230
BrandRecom
HK$147.92
單位
3.3 V dc - 1.2A 4W 80 264V ac 1 Through Hole Encapsulated 36.7mm 27.2mm 17.1mm - - -
RS庫存編號 813-9052
製造零件編號HWS-100A-12/A
BrandTDK-Lambda
HK$987.67
單位
12 V dc - 8.5A 100W 85 265 V ac, 120 370 V dc 1 Chassis Mount Enclosed 82mm 28mm 160mm - - 450g
RS庫存編號 678-3764
製造零件編號RS-50-48
BrandMean Well
HK$175.60
單位
48 V dc - 1.1A 52.8W 88 → 264 V ac, 125 → 373 V dc 1 Chassis Mount Enclosed 99mm 97mm 36mm - - 410g
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 192-1043
製造零件編號LPS22
HK$357.38
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 753-7821
製造零件編號MPQ-200D
BrandMean Well
HK$793.46
單位
5/±12/24 V dc - 2 A, 3 A, 15 A 140W 90 → 264 V ac, 127 → 370 V dc 4 Chassis Mount Open Frame 177.8mm 107.2mm 35.5mm - - 660g
RS庫存編號 770-4027
製造零件編號MSP-200-24
BrandMean Well
HK$2,004.29
單位
24 V dc - 8.4A 201.6W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 199mm 98mm 38mm - - 770g
RS庫存編號 644-8206
製造零件編號RSP-1500-48
BrandMean Well
HK$4,433.23
單位
48 V dc - 32A 1.5kW 90 → 264 V ac, 127 → 370 V dc 1 Chassis Mount Enclosed 278mm 127mm 83.5mm - - 3kg
RS庫存編號 739-8010
製造零件編號ZWS-150BAF-24
BrandTDK-Lambda
HK$687.30
單位
24 V dc - 6.3A 151W 85 265 V ac, 120 370 V dc 1 Chassis Mount Open Frame 188mm 47mm 85mm - - 390g
RS庫存編號 418-2229
製造零件編號TXL 060-05S
BrandTRACOPOWER
HK$545.93
單位
5 V dc - 12A 60W 85 264 V ac, 120 375 V dc 1 Chassis Mount Enclosed 169mm 95mm 38mm - - 700g
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 122-7077
製造零件編號ECM60UD21
BrandXP Power
HK$422.75
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 106-5849
製造零件編號LRS-150F-5RS
BrandMean Well
HK$212.71
單位
5 V dc - 22A 110W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 159mm 97mm 30mm - - 480g
RS庫存編號 377-6845
製造零件編號LFVLT40-3200
BrandEOS
HK$466.18
單位
5.2/12.5/12.8 V dc - 2 A, 6 A, 500 mA 40W 90 132 V ac, 180 264 V ac 3 Chassis Mount Open Frame 101.6mm 50.8mm 27.18mm - - 150g
RS庫存編號 418-2409
製造零件編號TXL 100-0534TI
BrandTRACOPOWER
HK$956.34
單位
5/12/24 V dc - 2 A, 4 A, 12 A 100W 85 264V ac 3 Chassis Mount Enclosed 208mm 95mm 38mm - - 800g