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Design of Buck Converter Based on Texas Instrument design Equation

Design of Buck Converter Based on Texas Instrument Design Equation


We'll explore the design of a buck converter based on Texas Instruments' equations. This power electronics endeavor involves crucial calculations for the power stage, including inductor ripple current and output capacitor considerations.

Equations and Requirements:

The design process begins with the Texas Instruments design equations, outlining the essential parameters for the buck converter. The equations cover inductor ripple current, impact calculations, and output capacitor calculations. These equations serve as the foundation for our MATLAB simulation.

MATLAB Implementation:

To implement the buck converter design, we utilize MATLAB, considering a 10 kHz frequency for the converter. The equations obtained from the Texas Instruments data sheet are employed to calculate the duty cycle, turn load resistance, and inductor and capacitor values.

Simulation Setup:

The MATLAB simulation involves building the converter circuit. The components include a DC source, IGBT, diode, RLC filter, and load resistance. The simulation incorporates measurements for current and voltage, providing a comprehensive analysis of the converter's performance.


Upon simulation, we observe an output voltage of approximately 5.6 volts, a current of 31 amps, and a power output of around 170 Watts. These results validate the design based on Texas Instruments' equations.

Considerations for Feedback Control:

While the simulation demonstrates the initial design's functionality, real-world applications require further refinement. Feedback control is essential for maintaining a constant load voltage. This step ensures the stability and reliability of the buck converter in practical scenarios.


In conclusion, this blog post has illustrated the process of designing a buck converter using Texas Instruments' equations and implementing it through a MATLAB simulation. The integration of feedback control is crucial for real-world applications, emphasizing the dynamic nature of power electronics design.

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