System Power Supply
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Choosing the Right Dc Power Supply for Your Application
The DC Power Supply is a rather fundamental electronic device, however there are hundreds of DC Power Supply products on the market from dozen of manufacturers. Narrowing down the best product for your application and budget can be a daunting task. This article addresses DC Power Supply differentiators, functions and the applications they are best suited for. The article's focus is DC Power Supplies used by engineers, manufacturers, quality professionals and electronic hobbyists for the purposes of R&D, manufacturing and testing.
Power Supplies can range in price from $50 to $20,000 and the cost is often directly proportional to the amount of power the device outputs. The primary function of a power supply is to regulate output voltage and current. It takes an input power and regulates the output power as to enforce a constant voltage and current. In the case of DC Power Supplies, the input power is converted from alternating current (AC) to direct current (DC). There are two basic types of regulated DC Power Supplies: Linear and Switching.
Linear power supplies can never output a higher voltage than the input source. In theory, a linear power supply that is driven by typical 110V wall outlet could only output 110V, assuming the device were 100% efficient. Realistically, no power supply is 100% efficient because power conversion always results in energy loss, usually in the form of heat dissipation. Therefore, linear power supplies usually output voltage that is significantly less than the input.
Switching power supplies can step-up, step-down or invert the input voltage. Switching power supplies are usually larger, noisier and more expensive than their linear counterparts, however, switching power supplies are typically more efficient.
Choosing the right DC power supply for your application requires definition of some basic design specifications: voltage range, current range, number of outputs, power cleanliness (known as "ripple") and programmability. In general, the higher the output voltage and the lower the ripple, the more expensive the DC Power Supply. Multiple outputs and programmability features will also add to the cost.
The least expensive DC Power Supplies are ideal for electronics hobbyists and basic electro-mechanical applications where only raw power is required. It is likely that the devices being powered in these applications already have power-conditioning features that eliminate the need for precision input power. Low power, single output, DC power supplies range in price from $50 to $200.
Mid-range power supplies are best suited for non-critical, laboratory projects involving more advanced electro-mechanical applications or basic board-level testing. Mid-range power supplies might have multiple outputs, higher power ratings, lower ripple and precision, digital metering (+/- .001V, +/- .01A). Mid-range DC power supplies can be linear or switching and could range in price from $200 to $1,000.
High-end applications requiring high output voltage, advanced programmability (GPIB PC Interfaces), numerous outputs and very low ripple should budget in excess of $1,000 for their DC power supply. Many laboratory, R&D and testing applications could easily spend $5,000 to $10,000 per power supply.
This article has introduced some basic features and applications of DC Power Supplies. Before making your final purchase, be sure to consult the manufacturer and thoroughly understand all the specifications of a particular product. Choosing the best and most economical DC Power Supply for your application does not have to be a complex and time-consuming task. By identifying your design parameters, you will quickly narrow down product selection to a niche class of products from only a few manufacturers.
About the Author
Robert Preville is the President and CEO of Global Test Supply, LLC, a distributor of test and measurement equipment, and welcomes question from those looking for a DC Power Supply
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Respironics SmartRecorder - Replacement Power Supply, With Cord $167.99 Replacement Power Supply with Cord for use with SmartRecorder - Multi Channel Recording System. |
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BCI 110V Power Supply for Spirolab III $149.63 BCI 110V Power Supply for use with BCI Spirolab III Spirometry System |
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IBM DC Power Supply System x3650 42C0766 $183.56 IBM DC Power Supply System x3650 42C0766 |
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Alcatel Omniswitch 80W-48VDC System Power Supply PS120I80DC48 $1037.5 Alcatel Omniswitch 80W-48VDC System Power Supply PS120I80DC48 |
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power supply $886.99 IBM - Power supply - for System Storage TS3200 Tape Library Model F3H Model L3H |
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14625 - Coolmax Cug-950B Eps12V Power Supply - 950W - Eps12V Power Supply $186.51 The Cug-950 Power Supply Gives Your System The Jolt And Boost it Needs to Deliver The Top Experience For Intense Graphic Rendered Games. [T21497] UPC: 0895963146250 UNSPC: 39121004 6L x 5.6W x 3.5H 7 LB |
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14746 - Coolmax Cul-750B Atx12V Power Supply - 750W - Atx12V Power Supply $100.95 This CUL-750B ATX12V Power Supply is a semi-modular power supply that lets you select the cables you need while powering your gaming system with a 140mm Blue LED cooling fan and 6 pin PCI-E ready. Everyone likes a clean and easy installation. This power supply allows you to keep what you want and remove what you don't. While necessary connectors, like the 20+4 pin power & 4+4 pin CPU connector are attached to the unit, you decide which of the others should stay. Customize your power supply to reflect your system. [BX9071] UPC: 895963147462 UNSPC: 39121004 6.3L x 5W x 3.3H 5 LB |
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14747 - Coolmax Cul-850B Atx12V Power Supply - 850W - Atx12V Power Supply $117.48 this Cul-850b Atx12v Power Supply is a Semi-modular Power Supply That Lets You Select The Cables You Need While Powering Your Gaming System With a 140mm Blue Led Cooling Fan And 6 Pin Pci-e Ready. 850w is Offering 140mm Blue Led Cooling Fan & Dual 6+2 Pci-e Ready. Everyone Likes a Clean And Easy Installation. This Power Supply Allows You to Keep What You Want And Remove What You Don't. While Necessary Connectors, Like The 20+4 Pin Power & 4+4 Pin Cpu Connector Are Attached to The Unit, You Decide Which of The Others Should Stay. Customize Your Power Supply to Reflect Your System. [BX9072] UPC: 895963147479 UNSPC: 39121004 6.3L x 5W x 3.3H 7.5 LB |
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14741 - Coolmax Cl-500B 500W Atx12V Power Supply - Atx12V Power Supply $70.08 Experience The Cl-500b Power Supply. It Offers a 120mm Blue Led Cooling Fan For Your Gaming System With Automatic Fan Speed Settings, so You no Longer Have to Worry About High or Low Settings And if Your Fan is Spinning Too Slow or Too Fast. The Cl-500b Power Supply Will Adjust Itself According to The Necessary Heat Dissipation Level. [BX9067] UPC: 895963147417 UNSPC: 39121004 5.6L x 5.9W x 3.3H 4.2 LB |
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14742 - Coolmax Cl-600B 600W Atx12V Power Supply - Atx12V Power Supply $82.2 Experience the CL-600B Power Supply. It offers a 120mm Blue LED cooling fan for your gaming system with automatic fan speed settings, so you no longer have to worry about high or low settings and if your fan is spinning too slow or too fast. The CL-600B Power Supply will adjust itself according to the necessary heat dissipation level. [BX9068] UPC: 895963147424 UNSPC: 39121004 5.6L x 5.9W x 3.3H 5 LB |
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14735 - Coolmax Cti-600B Atx12V Power Supply - 600W - Atx12V Power Supply $75.26 This CTI-600B ATX12V Power Supply With dual 80mm fans cooling your system, the CTI-600B keeps running smoothly. It comes with an automatic setting to adjust the fan speed according to the level of heat. The hotter your system, the faster the fan spins, and the faster your system cools. With great ventilation, you no longer have to worry about your system overheating. [T22141] UPC: 895963147356 UNSPC: 39121004 6L x 5.5W x 3.5H 5 LB |
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14031 - Coolmax Cf-480B Atx12V Power Supply - 480W - Atx12V Power Supply $120.11 the Cf-480b Atx 2.03 & Atx 12v Power Supply Is A High Performance Component, Designed For Extra Long Life And Provide Maximum System Performance. Heavy Duty Transformers Designed To Support High Performance System Several Drives. Cable-tube On Main Power Cables For Better Cable Routing And Neatness. Universal Connector Fits Most Of Branded Motherboards. [E94974] UPC: 0895963140319 UNSPC: 39121004 9.5L x 9W x 4H 7 LB |
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14629 - Coolmax V-600 Atx12V Power Supply - 600W - Atx12V Power Supply $67.17 the V-600 Atx12v Power Supply is The Power Supply For All Casual Users Who Needs a Pinch of Higher Than Average Power - 600 Watts. It Has All The Connectors You Need. Pci-e Ready For Your High-end Graphics Card, so You Can Have The Enhanced Picture You Want. With The New 13.5cm Fan For This Power Supply, You Can Keep Your System Cooler And Quieter Than Ever Before. The Fan Comes With an Automatic Setting to Adjust According to The Heat Dissipation Level Necessary Maintaining a Good Balance Between Noise And Cooling Level. [T22135] UPC: 0895963146298 UNSPC: 39121004 8.25L x 7.75W x 4H 3.6 LB |
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HP RPS1600 Power Supply Redundant Power System JG136A $1241.66 HP RPS1600 Power Supply Redundant Power System JG136A |
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14616 - Coolmax V-400 Atx12V Power Supply - 400W - Atx12V Power Supply $36.47 400 Watt Atx 12v Ver 2.01 Ac Power Supply Contains Specially Selected Components & High Performance Heat Sink To Cool Down System. Cable-tube On Main Power Cables For Better Cable Routing And Neatness. Universal Connector Fits Most Of Branded Motherboard. Over Voltage Protection, Short Circuit Protection On All Output Level. [H29813] UPC: 0895963146168 UNSPC: 39121004 8.25L x 7.5W x 3.88H 2.7 LB 0.14 Cubes |
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Redundant Power System 2300 - power supply - redundant $838.99 Cisco Redundant Power System 2300 - Power supply - redundant ( rack-mountable ) - 1U - for Cisco 28XX 28XX V3PN 3825 3825 V3PN Catalyst 29XX 35XX 3750 Catalyst Express |
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Rainbow Camera Power Supply $12.49 12 volt power supply for rainbow® cameras keep your security system running without downtime. Rainbow® 12-volt power supply. Supply power to your surveillance system. |
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14621 - Coolmax V-500 Atx12V Power Supply - 500W - Atx12V Power Supply $45.54 the V-500 Atx 12v V2.01 Power Supply Has Specially Selected Components & High Performance Heat Sink To Cool Down System. Serial Ata 150 Ready & Fully Support All Amd & Intel Series Demand. Cable-tube On Main Power Cables For Better Cable Routing And Neatness. Universal Connector Fits Most Of Branded Motherboard. Also The 120mm Silent Fan Design, For Long Life, Noiseless And Fastest Cooling Time. [L38907] UPC: 0895963146212 UNSPC: 39121004 8.4L x 7.6W x 4H 2.9 LB |
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14743 - Coolmax Cl-700B Atx12V Power Supply - 700W - Atx12V Power Supply $88.95 this Cl-700b Atx12v Power Supply Offers a 120mm Blue Led Cooling Fan For Your Gaming System With Automatic Fan Speed Settings, so You no Longer Have to Worry About High or Low Settings And if Your Fan is Spinning Too Slow or Too Fast. The Cl-700b Will Adjust Itself According to The Necessary Heat Dissipation Level. 700w Offer a 6+2 Pci-e Ready For Better Graphics Capabilities. Painted in Black, The Cl-series Works Great And Looks Great. [BX9069] UPC: 895963147431 UNSPC: 39121004 5.6L x 5.9W x 3.3H 5 LB |
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14738 - Coolmax Cu-500B Atx12V & Eps12V Power Supply - 500W - Atx12V & Eps12V Power Supply $69.26 The Coolmax CU-500B ATX12V & EPS12V Power Supply is a partial modular power supply that lets you select the cables you need while powering your system at a healthy 500 watts. Everyone likes a clean and easy installation. This power supply allows you to keep what you want and remove what you don't. While necessary connectors, like the 20+4 pin power connector, are attached to the unit, you decide which of the others should stay. Customize your power supply to reflect your system. [T22144] UPC: 895963147387 UNSPC: 39121004 6L x 5.5W x 3.5H 5 LB |
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14739 - Coolmax Cu-600B Atx12V & Eps12V Power Supply - 600W - Atx12V & Eps12V Power Supply $79.55 The Coolmax CU-600B ATX12V & EPS12V Power Supply is a partial modular power supply that lets you select the cables you need while powering your system at a healthy 600 watts. Everyone likes a clean and easy installation. This power supply allows you to keep what you want and remove what you don't. While necessary connectors, like the 20+4 pin power connector, are attached to the unit, you decide which of the others should stay. Customize your power supply to reflect your system. [T22145] UPC: 895963147394 UNSPC: 39121004 6L x 5.5W x 3.5H 5 LB |
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14740 - Coolmax Cu-700B Atx12V & Eps12V Power Supply - 700W - Atx12V & Eps12V Power Supply $87.65 the Coolmax Cu-700b Atx12v & Eps12v Power Supply is a Partial Modular Power Supply That Lets You Select The Cables You Need While Powering Your System at a Healthy 700 Watts. Everyone Likes a Clean And Easy Installation. This Power Supply Allows You to Keep What You Want And Remove What You Don't. While Necessary Connectors, Like The 20+4 Pin Power Connector, Are Attached to The Unit, You Decide Which of The Others Should Stay. Customize Your Power Supply to Reflect Your System. [T22146] UPC: 895963147400 UNSPC: 39121004 6L x 5.5W x 3.5H 5 LB |
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14749 - Coolmax Vl-600B Atx12V Power Supply - 600W - Atx12V Power Supply $65.92 This VL-600B ATX12V Power Supply is for all casual users who needs a pinch of higher than average power - 600 watts. It has all the connectors you need. PCI-E ready for your high-end graphics card, so you can have the enhanced picture you want. With the new 140mm Blue LED cooling fan for the VL-600B, you can keep your system cooler and quieter than ever before. The fan comes with an automatic setting to adjust according to the heat dissipation level necessary maintaining a good balance between noise and cooling level. [BX9070] UPC: 895963147493 UNSPC: 39121004 6.3L x 5W x 3.3H 5 LB |
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Smp3E - Altronix Smp3E Proprietary Power Supply $62.39 The SMP3E High Current Power Supply / Charger will convert a low voltage AC input to a low voltage DC output. This general purpose power supply has a wide range of applications for access control, security and CCTV system accessories that require additional power. [NC2764] Truck Delivery UPC: 782239933846 UNSPC: 39121004 9.25L x 8.75W x 4H 4.25 LB |
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POWER DSX80/160 Power Supply $84.68 - NEC DSX Power supply- For use with the DSX 80 and 160- One required (maximum) per DSX 80 system- One to three required per DSX 160 systemNEC1091008 |
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Power supply slot cover $104.99 Cisco - Power supply slot cover - for Catalyst 3560E-12 3560E-24 3560E-48 Redundant Power System 2300 |
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Tp-550 - Antec Tp-550 Atx12V & Eps12V Power Supply - 550W - Atx12V & Eps12V Power Supply $99.61 the Tp-550 Atx12v & Eps12v Power Supply Offers Users an Advanced Power Supply Solution, Striking The Perfect Balance of Reliability, Efficiency And Quality. With DC to DC Voltage Regulator Modules, a 120mm Pwm Fan, And 80 Plus Bronze Certification, This Power Supply is Ideal Solution For Elite System Builders And Quality-minded Enthusiasts Alike. [TP550] UPC: 761345235525 UNSPC: 39121004 9.3L x 8.5W x 4.5H 6.3 LB 0.19 Cubes |
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Tp750Blue - Antec Truepower Tp-750 Blue Atx12V & Eps12V Power Supply - 750W - Atx12V & Eps12V Power Supply $139.95 the Truepower Tp-750 Blue Atx12v & Eps12v Power Supply Offers Users an Advanced Power Supply Solution, Striking The Perfect Balance of Reliability, Efficiency And Quality. With DC to DC Voltage Regulator Modules, a 120mm Pwm Fan, And 80 Plus Bronze Certification, The Power Supply is The Ideal Solution For Elite System Builders And Quality-minded Enthusiasts Alike. [V95609] UPC: 761345237543 UNSPC: 39121004 5.9L x 5.9W x 3.4H 6.5 LB 0.2 Cubes |
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Tp-750 - Antec Tp-750 Atx12V & Eps12V Power Supply - 750W - Atx12V & Eps12V Power Supply $133.82 the Tp-550 Atx12v & Eps12v Power Supply Offers Users an Advanced Power Supply Solution, Striking The Perfect Balance of Reliability, Efficiency And Quality. With DC to DC Voltage Regulator Modules, a 120mm Pwm Fan, And 80 Plus Bronze Certification, This Power Supply is Ideal Solution For Elite System Builders And Quality-minded Enthusiasts Alike. [TP750] UPC: 761345237529 UNSPC: 39121004 9.2L x 8.5W x 4.6H 6.55 LB 0.21 Cubes |
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Bp350 - Antec Basiq Bp350 Atx 12V V2.01 Power Supply - 350W - Atx12V Power Supply $44.58 building On A Budget Doesn't Mean You Have To Trust Your Components To An Un-reliable No-name Brand. That's Why Antec Took Its Years Of Experience And Knowledge In Building World-class Power Supplies And Made This Power Supply. The Workhorse Of The Antec Family. This Power Supply Is Built With Solid Quality You Have Come To Expect From Antec Products At An Unbeatable Price. Power Supply Does The Job Simply, Efficiently And Reliably, Making This Power Supply A Solid Power Supply Built To Satisfy The Demands On The Entry-level Power User Or The Budget Minded System Builder. [BP350] UPC: 761345233507 UNSPC: 39121004 8.25L x 7.75W x 4.45H 3.6 LB 1 Cubes |
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Smp10 - Altronix Smp10 Proprietary Power Supply $110.38 These power supply/chargers convert a low voltage AC input into 12VDC or 24VDC @ 10 amp of continuous supply current. These units have a wide range of applications for access control, security and CCTV system accessories that require additional power. [NC2742] Truck Delivery UPC: 782239930388 UNSPC: 39121004 4.25L x 2.25W x 7.25H 1.1 LB |
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Smp5 - Altronix Smp5 Proprietary Power Supply $50.81 This power supply/charger converts a low voltage AC input into 6VDC, 12VDC or 24VDC @ 4 amp continuous supply current. This unit has a wide range of applications for access control, security and CCTV system accessories that require additional power. [2941189] UPC: 782239930470 UNSPC: 39121004 3L x 2W x 4H 0.45 LB |
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14021 - Coolmax Cx-450B Atx12V Power Supply - 450W - Atx12V Power Supply $62.51 high Performance Components Are Designed For Extra Long Life And Provide Maximum System Performance heavy Duty Transformers Designed To Support High Performance System Several Drives cable-tube On Main Power Cables For Better Cable Routing And Neatness & Colored Fan (optional) over Voltage,over Power And Short Circuit Protection built In Emi Filter, Low Ripple Noise passive Pfc: 0.7@230vac active Pfc: 0.95 Min [E94989] UPC: 0895963140210 UNSPC: 39121004 9.25L x 8.5W x 4H 4.6 LB 0.18 Cubes |
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14017 - Coolmax Cx-350B Atx12V Power Supply - 350W - Atx12V Power Supply $46.48 high Performance Components Are Designed For Extra Long Life And Provide Maximum System Performance heavy Duty Transformers Designed To Support High Performance System Several Drives cable-tube On Main Power Cables For Better Cable Routing And Neatness & Colored Fan (optional) over Voltage,over Power And Short Circuit Protection built In Emi Filter, Low Ripple Noise passive Pfc: 0.7@230vac active Pfc: 0.95 Min [E94979] UPC: 0895963140173 UNSPC: 39121004 9.25L x 8.5W x 4H 4.65 LB 0.18 Cubes |
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14019 - Coolmax Cx-400B Atx12V Power Supply - 400W - Atx12V Power Supply $50.1 high Performance Components Are Designed For Extra Long Life And Provide Maximum System Performance heavy Duty Transformers Designed To Support High Performance System Several Drives cable-tube On Main Power Cables For Better Cable Routing And Neatness & Colored Fan (optional) over Voltage,over Power And Short Circuit Protection built In Emi Filter, Low Ripple Noise passive Pfc: 0.7@230vac active Pfc: 0.95 Min [E94980] UPC: 0895963140197 UNSPC: 39121004 9.25L x 8.5W x 4H 4.7 LB 0.18 Cubes |
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Iw-R100-00-S400 - System Cabinet - Rack-Mountable - Extended Atx - Power Supply - 400 Watt $229.99 SYSTEM CABINET - RACK-MOUNTABLE - EXTENDED ATX - POWER SUPPLY - 400 WATT [2513960] Truck Delivery UPC: 692567181997 UNSPC: 43201601 28 LB 1 Cubes |
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HP A-RPS1600 Redundant Power System - Power Supply - Redundant. Each $1539.66 Manufacturer: HP. Each. Device Type: Power supply - redundant Localization: English / United States Customers also search for: Discount HP A-RPS1600 Redundant Power System - Power Supply - Redundant, Buy HP A-RPS1600 Redundant Power System - Power Supply |
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Is-700S2Up - 2U 700W Rohs Redundant Power Supply $685.72 Is-700s2up Atx12v & Eps12v Power Supply Offers Your Server And Workstation Zero Down Time With Full 700w Power Redundancy. Active Pfc, Temperature Control Fan, Hot Swappable Power Modules And Load Sharing Function Provide Ultimate Precision Power And Safety Protection For All Electronic Equipment. A Good Start For Your Mission Critical System Integrations. [2292170] UPC: 689076112321 UNSPC: 39121004 17.5L x 6.5W x 8.5H 12 LB |
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Ultlsp450 - Ultra Lifetime Series Pro 450W Atx12V & Eps12V Power Supply - Atx12V & Eps12V Power Supply $58.4 this Ultra Lifetime Series Pro 450w Atx12v & Eps12v Power Supply Provides The Ultimate Amount of Power And Performance. It's Sleek New Design Incorporates Ascetics With Functionality. This Design Comes With a 135mm Cooling Fan Which Reduces Heat by 20% And Noise by 15 Db. In Addition to The Reduction of Heat And Noise, The Power Supply Also Comes With Sleeved Finished Power Cables Which Provide Better Air Flow And Help Reduce Cable Clutter. Over All This New Power Supply is The Ultimate Upgrade or Addition to Any System. [ULTLSP450] UPC: 022769401157 UNSPC: 39121004 10.9L x 6.8W x 3.9H 4.4 LB |
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External Power System EPS-500 - power supply - 500 Watt $767.99 Extreme Networks External Power System EPS-500 - Power supply - AC 115/230 V - 500 Watt - for Summit X450a-48t |