Introduction
The B-G474E-DPOW1 Discovery kit is a complete digital power starter kit controlled by the STM32G474RET6 microcontroller,
based on an
Arm
®
Cortex
®
-M4 core. The kit showcases the features of digital power including LED dimming, buck-boost with
variable load, power delivery (
USB Type-C
®
), and audio class-D amplification.
This application note focuses on the step-down converter on the discovery kit, and describes the principles of peak-current-
mode control. It also details how to design a compensator to stabilize and regulate the peak-current-mode controlled step-down
converter, and how to implement this on the STM32 microcontroller.
This application note also presents the buck current mode usage with the X-CUBE-DPOWER STM32Cube Expansion Package.
Figure 1.
B-G474E-DPOW1 top view Figure 2. B-G474E-DPOW1 bottom view
Pictures are not contractual.
Introduction to the buck current mode with the B-G474E-DPOW1 Discovery kit
AN5497
Application note
AN5497 - Rev 4 - February 2024
For further information contact your local STMicroelectronics sales office.
www.st.com
