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 680-2789
製造零件編號LS75-36
BrandTDK-Lambda
HK$291.40
單位
36 V dc - 2.1A 75W 88 → 264 V ac, 125 → 373 V dc 1 Chassis Mount Enclosed 5.1in 3.8in 1.5in - - 410g
RS庫存編號 706-6085
製造零件編號TML 20512
BrandTRACOPOWER
HK$512.91
單位
5/±12 V dc - 2.8 A, 250 mA 20W 90 → 264 V ac, 100 → 375 V dc 3 PCB Mount Encapsulated 70mm 48mm 22mm - - 110g
RS庫存編號 660-0151
製造零件編號AD-155C
BrandMean Well
HK$825.67
單位
53.5/54 V dc - 2.7 A, 200 mA 156.5W 88 → 264 V ac, 124 → 370 V dc 2 Chassis Mount Enclosed 199mm 110mm 50mm - - 880g
RS庫存編號 183-0111
製造零件編號LPT62
HK$455.51
單位
5/±12 V dc - 1 A, 3.5 A, 8 A 60W 85 → 264 V ac, 120 → 300 V dc 3 Chassis Mount Open Frame 127mm 76.2mm 42.9mm - - 340g
RS庫存編號 414-046
製造零件編號SP-150-5
BrandMean Well
HK$534.87
單位
5 V dc - 30A 150W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 199mm 99mm 50mm - - 760g
RS庫存編號 892-0630
製造零件編號TMPS 05-105
BrandTRACOPOWER
HK$166.55
單位
5 V dc - 1.3A 5W 85 → 264V ac 1 Through Hole Encapsulated 25.4mm 25.4mm 15.3mm - - -
RS庫存編號 833-8154
製造零件編號MAP55-4002
HK$3,133.50
單位
5/±12 V dc - 3 A, 6 A, 500 mA 55W 90 → 132 V ac, 175 → 264 V ac 4 U Bracket U Bracket 152.4mm 83.1mm 40.6mm - - 550g
RS庫存編號 644-6935
製造零件編號RS-25-5
BrandMean Well
HK$175.00
單位
5 V dc - 5A 25W 88 → 264 V ac, 125 → 373 V dc 1 Chassis Mount Enclosed 78mm 51mm 28mm - - 200g
RS庫存編號 455-7853
製造零件編號LPS172-C
HK$1,485.98
單位
5 V dc - 35A 110W 85 → 264 V ac, 120 → 300 V dc 1 Chassis Mount Enclosed 216mm 108mm 38.1mm - - 850g
RS庫存編號 489-8592
製造零件編號PBA75F-5-N
BrandCosel
HK$836.74
單位
5 V dc - 15A 75W 85 → 264 V ac, 120 → 370 V dc 1 Chassis Mount Enclosed 151.5mm 82.5mm 35.5mm - - 350g
RS庫存編號 106-5843
製造零件編號LRS-100-5RS
BrandMean Well
HK$187.45
單位
5 V dc - 18A 90W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 129mm 97mm 30mm - - 340g
RS庫存編號 739-7979
製造零件編號LS200-24
BrandTDK-Lambda
HK$697.57
單位
24 V dc - 8.4A 200W 85 → 264 V ac, 120 → 373 V dc 1 Chassis Mount Enclosed 210mm 98mm 41mm - - 700g
RS庫存編號 122-7092
製造零件編號ECM60UT33
BrandXP Power
HK$423.47
單位
5/±15 V dc - 2.5 A, 8 A, 500 mA 60W 90 → 264 V ac, 120 → 370 V dc 3 Chassis Mount Open Frame 101.6mm 50.8mm 27mm - - 150g
RS庫存編號 418-2308
製造零件編號TXL 060-0534TI
BrandTRACOPOWER
HK$783.79
單位
5/12/24 V dc - 1.2 A, 1.5 A, 6 A 60W 85 → 264 V ac, 120 → 375 V dc 3 Chassis Mount Enclosed 169mm 95mm 38mm - - 700g
RS庫存編號 603-1139
製造零件編號PBW30F-15-N
BrandCosel
HK$518.91
單位
±15 V dc - 1 A, 1.4 A 30W 85 → 264 V ac, 110 → 370 V dc 2 Chassis Mount Enclosed 119.5mm 34.5mm 78mm - - 270g
RS庫存編號 644-8212
製造零件編號SP-320-48
BrandMean Well
HK$768.47
單位
48 V dc - 6.7A 321.6W 88 → 264 V ac, 124 → 370 V dc 1 Chassis Mount Enclosed 215mm 115mm 50mm - - 1.1kg
RS庫存編號 122-7584
製造零件編號ECP130PS12
BrandXP Power
HK$723.00
單位
12 V dc - 10.83A 130W 85 → 264V ac 1 Chassis Mount Open Frame 76.2mm 50.8mm 24.1mm - - 195g
RS庫存編號 621-0685
製造零件編號RS-150-24
BrandMean Well
HK$266.26
單位
24 V dc - 6.5A 156W 88 → 132 V ac, 176 → 264 V ac, 248 → 373 V dc 1 Chassis Mount Enclosed 199mm 98mm 38mm - - 700g
RS庫存編號 777-3109
製造零件編號EPS-15-5
BrandMean Well
HK$164.43
單位
5 V dc - 3A 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 200-162
製造零件編號NV1-4G5FF
BrandTDK-Lambda
HK$2,540.06
單位
5/±15/24 V dc - 1 A, 5 A, 7.5 A, 8 A 180W 90 → 264V ac 4 Chassis Mount Open Frame 5in 3in 1.25in - - 250g