Transcription of DC/DC Converter Controller Using a PICmicro …
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DC/DC Converter Controller Using a PICmicro …
2000 Microchip Technology 1AN216 INTRODUCTIONIn many applications, a DC/DC Converter is used toproduce a regulated voltage or current , derived from anunregulated power supply, or from a battery. Examplesof these applications include battery chargers, elec-tronic air purifiers, emergency exit signs, and distrib-uted power some of those applications, a dedicated SwitchedMode Power Supply (SMPS) Controller IC is used inconjunction with a microcontroller. In other applica-tions, however, a dedicated SMPS Controller IC may beoverkill. An alternative approach is to generate a lowcost SMPS function in a smart microcontroller, such asthe PIC16C620A. This Application Note shows amethod of Using the microcontroller to perform simpleSMPS control circuits were built for evaluation.
AN216 DS00216A-page 4 Preliminary 2000 Microchip Technology Inc. Similar to the Constant Voltage applications, depend-ing on the need, a trimming potentiometer may be required in the Constant Current application as well.
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