Buck converter circuit explained

Buck Converter Design Template Mathcad

This is a very powerful buck converter design template tool that automatically computes all the parameters for a buck converter. No need to do long calculations as this template will give everything. All you have to do is to input your design requirements and that’s it.

You can use this template for either non-synchronous and synchronous buck converter topologies. There are notes in the design template so you can understand for what this parameter to. The good thing of this design template is that you can counter check the design equations.

Requirements for this Buck Converter Design Template:

A computer with Mathcad 14 or 15.

Parameters Covered in this Buck Converter Design Template Mathcad

Below are some of the key features of this buck converter design template. They are all derived in detailed.

1. Upper and lower switch (Q1 and Q2)

1.1 RMS and peak current

1.2 Drain voltage

1.3 Power losses, conduction and switching

1.4 Thermal consideration

2. Catch diode (D1)

2.1 RMS and peak current

2.2 Peak reverse voltage

2.3 Power losses

2.4 Thermal consideration

3. Inductor (L1)

3.1 RMS and saturation current

3.2 Power losses

3.3 Ripple current

4. Output Capacitor (C1)

4.1 RMS ripple current

4.2 Output ripple voltage requirement

4.3 Voltage rating

Also covered in this design template are thermal calculations and predictions, efficiency and operation mode checking.

Derivations of Equations Buck Converter Design Template

If you want to validate the credibility of this buck converter design template, you can check the derivations in the upper portion of the template. Few snapshots below on how the derivations done.

These are complete derivations following power electronics principles.

Buck Converter Design Template

Proven Design Template

This is a proven design template. All calculated results are matching with simulations and very close to actual values. This is being used by all the buck converter I designed and released to the market. Should you have any questions regarding the template once you have it downloaded, I am very willing to help you. The template is not locked, so you can do whatever you want. Try it now!


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