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Is this possible to design smps with single micro-controller?

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Mithun_K_Das

Mithun_K_Das

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Is this possible to design micro-controller based smps? I mean only one MCU will handle all the mechanism? especially any pic microcontroller?
 

Peinciple answer: yes. You are creating a time-discrete feedback controller, the processing time adds to your total loop deadtime. Achievable controller dynamic will be limited by the processor speed. Typically fast uCs like dsPIC are used for this purpose.
 
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    tpetar

    tpetar

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See this:

These are some experiments to use a PIC as a complete SMPS. As a PIC has everything needed; push-pull FET output pins and the ability to oscillate, and to measure and regulate voltage and current it might be possible to use a PIC as a complete SwitchMode Power Supply.

If the PIC output pin is oscillated at a high enough frequency into an inductor it performs exactly as a SMPS Buck regulator with synchonous rectification. Basically that means it will convert +5v to a lower voltage with quite high efficiency.

PIC-SMPS
https://www.romanblack.com/smps/pic-smps.htm
 

Thanks for your link tpetar.
But, will PIC able to generate so high frequency that SMPS need? Such as 200KHz? I tried with 12F & 16F series... and got 52KHz max.
 

I tried with 12F & 16F series... and got 52KHz max.
Click to expand...
200 kHz won't work without hardware PWM, available at least for many PIC16 devices.
 

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