Cheap Switch-Mode DC-DC Converter


Posted on Feb 4, 2014

This circuit is based on mobile phone chargers. These chargers are based on the Motorola MC34063 switchmode IC. By changing the values of the feedback resistors (R1 & R2), the output voltage can be varied over a wide range. Just modify R1 and R2 according to the formula: Vout = 1. 25 (1+R2/R1). The values shown give an output of 3V.


Cheap Switch-Mode DC-DC Converter
Click here to download the full size of the above Circuit.




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