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DC/DC Converter Controller Using a PICmicro Micro [Design Idea]
posted October 20 2014 17:54.32 by Giorgos Lazaridis

Microchip has a very good Application Note (216) explaining how to properly design and calculate a DC/DC converter circuit using a PIC microcontroller:

In many applications, a DC/DC Converter is used to produce a regulated voltage or current, derived from an unregulated power supply, or from a battery. Examples of these applications include battery chargers, electronic air purifiers, emergency exit signs, and distributed power systems. In some of those applications, a dedicated Switched Mode Power Supply (SMPS) Controller IC is used in conjunction with a microcontroller. In other applications, however, a dedicated SMPS Controller IC may be overkill. An alternative approach is to generate a low cost SMPS function in a smart microcontroller, such as the PIC16C620A. This Application Note shows a method of using the microcontroller to perform simple SMPS control functions. Two circuits were built for evaluation. One circuit provides a Constant Voltage output, the other a Constant Current output

Download Application Note 216 here
The code is located here

[Link: Microchip]

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