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$2,616.54
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 106-5828
製造零件編號LRS-50-3.3
BrandMean Well
HK$135.51
單位
3.3 V dc - 10A 33W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS庫存編號 627-3771
製造零件編號XLC
BrandExcelsys
HK$1,755.18
單位
- - - 600W 85 → 264 V ac, 120 → 380 V dc 4 Chassis Mount Enclosed 269.75mm 89mm 40.4mm - - 750g
RS庫存編號 106-5832
製造零件編號LRS-50-24RS
BrandMean Well
HK$116.44
單位
24 V dc - 2.2A 52.8W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 99mm 82mm 30mm - - 230g
RS庫存編號 122-7046
製造零件編號ECM100US12
BrandXP Power
HK$618.24
單位
12 V dc - 8.3A 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 621-0641
製造零件編號RS-75-24
BrandMean Well
HK$160.07
單位
24 V dc - 3.2A 76.8W 88 → 264 V ac, 125 → 373 V dc 1 Chassis Mount Enclosed 129mm 97mm 38mm - - 410g
RS庫存編號 706-6060
製造零件編號TML 20124
BrandTRACOPOWER
HK$522.98
單位
24 V dc - 840mA 20W 90 → 264 V ac, 100 → 375 V dc 1 PCB Mount Encapsulated 70mm 48mm 22mm - - 110g
RS庫存編號 192-1122
製造零件編號LPT25
HK$322.42
單位
5/±15 V dc - 2 A, 4 A, 700 mA 25W 85 → 264 V ac, 120 → 300 V dc 3 Chassis Mount Open Frame 127mm 76.2mm 29mm - - 230g
RS庫存編號 777-3106
製造零件編號EPS-15-12
BrandMean Well
HK$164.43
單位
12 V dc - 1.25A 15W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Open Frame 63.5mm 45.7mm 24mm - - 57g
RS庫存編號 122-7871
製造零件編號VCS100US48
BrandXP Power
HK$263.99
單位
48 V dc - 2.08A 100W 85 → 264 V ac, 127 → 370 V dc 1 Chassis Mount Enclosed 159mm 98.2mm 42mm - - 500g
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 85 → 264 V ac, 120 → 300 V dc 1 Chassis Mount Open Frame 127mm 76.2mm 42.9mm - - 340g
RS庫存編號 106-5869
製造零件編號LRS-350-24RS
BrandMean Well
HK$342.88
單位
24 V dc - 14.6A 350W 90 → 132 V ac, 180 → 264 (By Switch) V ac, 240 → 370 V dc 1 Chassis Mount Enclosed 215mm 115mm 30mm - - 760g
RS庫存編號 424-380
製造零件編號NFM-10-5
BrandMean Well
HK$120.39
單位
5 V dc - 2A 10W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Open Frame 65mm 45mm 22mm - - 45g
RS庫存編號 413-639
製造零件編號RT-125D
BrandMean Well
HK$390.75
單位
5/12/24 V dc - 2 A, 3 A, 8 A 136W 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc 3 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS庫存編號 706-6120
製造零件編號TML 40512
BrandTRACOPOWER
HK$1,189.24
單位
5/±12 V dc - 5 A, 600 mA 40W 90 → 264 V ac, 100 → 375 V dc 3 PCB Mount Encapsulated 89mm 63.5mm 25mm - - 280g
RS庫存編號 848-1851
製造零件編號GLC40AG
HK$1,010.02
單位
5.1/±12 V dc - - 40W 90 → 264V ac 3 Chassis Mount Open Frame - - - - - -
RS庫存編號 106-5861
製造零件編號LRS-200-24RS
BrandMean Well
HK$267.08
單位
24 V dc - 8.8A 211W 90 → 132 V ac, 180 → 264 (By Switch) V ac, 240 → 370 V dc 1 Chassis Mount Enclosed 215mm 115mm 30mm - - 660g
RS庫存編號 489-8643
製造零件編號PBA100F-12-N
BrandCosel
HK$806.52
單位
12 V dc - 8.5A 102W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 160.5mm 93.5mm 35.5mm - - 440g
RS庫存編號 413-673
製造零件編號RS-15-5
BrandMean Well
HK$105.00
單位
5 V dc - 3A 15W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 62.5mm 51mm 28mm - - 130g
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