Electronics Projects, PIC16C620 DC to DC Converter Circuit SMPS article
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Dc to dc converter circuit based on the powerful but pleasing formulas given all the details about the project is the original microchip application notes. pic16c620 Source code flow diagramm AMS assembly area and it’s a lot more information
DC DC Converter Circuitt Using a PICmicro® 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.
PICmicro DC to DC Converter Circuit files: DCD-Converter-Controller-picmicro.PDF and DCD-Converter-Controller-picmicro.zip