Transformer and linear power supply

Posté le 2020-01-16 Tutorials & Guides, Guides 16027

Linear Power Supply

A linear power supply always includes the following elements :

  • An electric transformer the purpose of which is to lower the voltage drawn from your electricity grid in order to provide your device with a suitable voltage.
  • A rectifier bridge, that is generally already mounted on the PCB of your power supply. It plays a major role in the AC to DC conversion.
  • A (or many) capacitor(s) for smoothing the output voltage curve as to make the power output as linear as possible.
  • A voltage regulator for stabilizing the voltage even when the circuit or electricity grid is subjected to variations.

Power supply module

As a rule of thumb, the rectifier bridge, the capacitors and the voltage regulator are all gathered on a single PCB. The convention is to call this PCB a "Power Supply Module".

Use the interface below to calculate which values are suitable for your transformer & power supply module.

Click on the double arrow to change the direction of the calculation (get the correct value for your transformer to obtain a given output value on your power supply / get the output value of your power supply given a specific output voltage on your transformer).

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