Step-down converter wikipedia

It is possible to use a higher input voltage than 5V, but as with any linear regulator, the power dissipation of the regulator is dependent on the difference between the input voltage and the output voltage along with the amount of current that is being drawn from the regulator. The larger the difference between the Vin and Vout, the higher the power dissipation which limits how much current can be drawn from the device. As you can see in the chart below, the usable current goes down rapidly as the input voltage increases.

These are best suited for 5V operation unless your current requirements are small. At 9V current should be limited to about mA and at 12V the current should be limited to about 75 mA.

This is most important on the output side, since we are trying to lose some of the voltage on the input side anyway. Views Read View source View history. Navigation Main page Random page Recent changes.

This page was last modified on 4 November , at Privacy policy About Wiki Disclaimers. This is the positive input supply for the IC switching regulator. A suitable input by pass capacitor must be present at this pin to minimize voltage transients and to supply the switching currents needed by the regulator. Internal switch. The voltage turn ratio of the step-down transformer is The voltage turn ratio determines the magnitude of voltage transforms from primary to secondary windings of the transformer.

Step-down transformer is made up of two or more coil wound on the iron core of the transformer. It works on the principle of magnetic induction between the coils. The voltage applied to the primary of the coil magnetise the iron core which induces the secondary windings of the transformer.

Thus the voltage transforms from primary to the secondary winding of the transformer. Applications — It is used for electrical isolation, in a power distribution network, for controlling the home appliances, in a doorbell, etc. That was such an awesome content to read and going through it. Thanks for such a good information.