BeginnerMATLAB R2026a

48 V → 12 V automotive buck converter (250 W)

The DC-DC converter that feeds a car's 12 V system from a 48 V mild-hybrid battery.

Aim

Design and simulate a 100 kHz, 250 W buck converter in open loop and with a digital PI voltage controller, and compare their response to load steps.

An interactive illustration of the idea behind this experiment.

Switching and PWM

Duty cycle D25 %

Average output Vout ≈ D × 48 V

12.0 V

Simplified illustration for learning. Run the MATLAB model for exact, physics-based results.

Unzip the package we send you.
Go to matlab.mathworks.com and sign in (campus licence or MathWorks trial).
In MATLAB Drive, click Upload and choose the unzipped folder.
In MATLAB Online, open the folder and double-click the model (.slx) or run the start script named in README.
Press Run. Results appear in the scopes, dashboard or figures.

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