Sep.2024 26
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How to Choose the Correct Power Supply for the End Systems

Introduction
Constant voltage power adapter converts the main power AC100-240V into a smaller DC voltage that your end device needs to operate. Usually these are required for charging or powering operated devices.
Details
Constant voltage power adapter converts the main power AC 100-240V AC into a smaller usually DC voltage that your end device needs to operate. Usually these are required for charging or powering operated devices.

When you purchase, the best way is to check if your device has a specific power adapter already available. If you can not find one then you can find out what your device needs to operate, so inspect the device and look for any labels that indicate either the voltage or mAh/A.

Choosing the right power adaptor specs to make sure you check the following:
  • The power supply output voltage matched the rated input voltage of the device. VAC or VDC.
  • The power supply output is greater or equal to the devices rated mAh or A.
  • The plug fits into your device and has the correct polarity. The most common is center positive(+)connectors; also have the less popular center negative(-) connector.

Voltage carries the power and the Amps are the measurement of how much power it consumes, the basic equations are here:

W(wattage)=V(voltage) x A(amps)

A(amps)=W(wattage) / V(voltage)

V(voltage)=W(wattage) / A(amps)

Switching Power Supply Manufacturer

Meanwhile, to increase the reliability of the power supplies, we suggest clients choose a unit that has a rating of 30% more power than actual need. For example, if your device needs a 50W power source, we suggest that clients choose a power adapter with 65W of output power or more. In this way you can effectively increase the reliability of the power adaptor in your system.
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