In the Buck converter tutorial block, we show how to use the O2 as a buck converter from open-loop to closed-loop voltage mode control.

The O2 will be configured in buck configuration. Its NGND switch will be ON and its legs will be interleaved, as shown below.

O2 configuration in Buck mode

A typical application case is to step down the voltage of a power supply to power a load, a shown below.

Application of the O2 as a Buck converter

• Buck 1 - Open-loop PWM control - You will setup the O2 as a buck converter on open-loop operation. You will be able to rise and lower the duty cycle and observe its value on the Serial Monitor.
• Buck 2 - Activating measurements - You will setup all the measurements available on the O2. You will then monitor these measurements using the SerialPlot while changing the duty cycle of the converter by hand.
• Buck 3 - Closed-loop voltage mode control - You will setup the O2 as a buck converter on closed-loop operation. You will use the low-side voltage measurement together with a PID controller to track the low-side voltage according to a reference.

Prerequisite Getting started tutorials