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Application Notes

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5V Power Supplies

5V power supplies (or 5VDC power supplies) are one of the most common power supplies in use today. In general, a 5VDC output is obtained from a 50VAC or 240VAC input using a combination of transformers, diodes and transistors. 5V power supplies can be of two types: 5V regulated power supplies, and 5V unregulated power supplies.5V regulated power supplies come in three styles: Switching regulated AC to DC, Linear regulated AC to DC, and Switching regulated DC to DC.

Switching regulated 5VDC power supplies, sometimes referred to as SMPS power supplies, switchers, or switched mode power supplies, regulate the 5VDC output voltage using a complex high frequency switching technique that employs pulse width modulation and feedback. Acopian switching regulated power supplies also employ extensive EMI filtering and shielding to attenuate both common and differential mode noise conducted to the line and load. Galvanic isolation is standard in our 5VDC switchers, affording our users input to output and output to ground isolation for maximum versatility. Acopian switching regulated power supplies are highly efficient, small and lightweight, and are available in both AC-DC single and wide-adjust output and DC-DC configurations. Our Low Profile wide adjust output switchers can be voltage or current regulated and are externally programmable.

Linear regulated 5VDC power supplies regulate the output using a dissipative regulating circuit. They are extremely stable, have very low ripple, and have no switching frequencies to produce EMI. Galvanic isolation is standard in our 5VDC linears, affording our users input to output and output to ground isolation for maximum versatility. Acopian linear regulated power supplies are available AC to DC single and wide adjust outputs.

Unregulated 5VDC power supplies are basic power supplies with an AC input and an unregulated 5VDC output. The output voltage changes with the input voltage and load. These power supplies are inexpensive and extremely reliable.

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Typical applications for 5VDC power supplies:
Mini Encapsulated 5VDC Switchers (PC board mount):
Mini Encapsulated 5VDC Switchers (screw terminal):
Mini Encapsulated 5VDC Linears (PC board mount):
Mini Encapsulated 5VDC Linears (Screw Terminal):
Linear Regulated Redundant 5VDC Power Packages (rack mounting)
Linear Regulated Redundant 5VDC Power Packages (wall mounting)
Parallelable “Semisystem” Linear Regulated 5VDC Power Supplies
Switching Regulated 5VDC Pluggable Redundant Power Packages
Linear Regulated 5VDC Modular Redundant Systems
Switching Regulated 5VDC Modular Redundant Systems
Rack Mounting 5VDC Linear Regulated Power Supplies
Narrow Profile 5VDC linear Regulated Power Supplies
Narrow Profile 5VDC switching Regulated Power Supplies (to 120W)
Narrow Profile 5VDC switching Regulated Power Supplies (to 288W)
Low profile 5VDC switching Regulated Power Supplies
Gold Box 5VDC Linear Regulated Power Supplies
Gold Box 5VDC switching Regulated Power Supplies
Gold Box 5VDC Unregulated Power Supplies
Gold Box Dual Tracking Output 5VDC Linear Regulated Power Supplies
Gold Box Dual Isolated Output 5VDC Linear Regulated Power Supplies
Gold Box Dual Isolated Output (5V/12V combinations) Linear Regulated Power Supplies
Gold Box Triple Isolated Outputs Linear Regulated Power Supplies
Mini encapsulated DC-DC converters
Narrow profile DC-DC converters
Gold Box Infinity 5VDC Linear Regulated Power Supplies
1U 5VDC Switching Regulated Rack Mount Power Supply
1U 5VDC Switching Regulated Bench Top Power Supply
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