Author Topic: Doubt of BOOST/BUCK circuit operation  (Read 334 times)

0 Members and 1 Guest are viewing this topic.

Offline Leo86

  • Contributor
  • Posts: 6
  • Country: br
Doubt of BOOST/BUCK circuit operation
« on: February 27, 2019, 04:24:26 am »
Hi everone!

I am studying circuits of power converters, and researching found the GreatScott channel! on youtube and it explains how to develop a BOOST / BUCK converter with a microcontroller.
I was in doubt trying to understand his circuit.
I did not understand why he used an MCP602 in the circuit. Could someone explain?
Another question, is this circuit a SEPIC converter?



Online Nerull

  • Frequent Contributor
  • **
  • Posts: 681
Re: Doubt of BOOST/BUCK circuit operation
« Reply #1 on: February 27, 2019, 04:33:20 am »
The opamp scales the voltage across the load from 0-20V to 0-5V so the ADC in the microcontroller can handle it. The MCU needs to sense the output voltage to adjust its regulation depending on the load, but it cannot deal with the output voltage of this circuit directly.

If it was a SEPIC circuit than it would have two inductors and its output wouldn't be inverted.
« Last Edit: February 27, 2019, 04:38:19 am by Nerull »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo