Power Stage Designer of Most Commonly Used Switchmode Power Supplies


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Power Stage Designer of Most Commonly Used Switchmode Power Supplies




Power Stage Designer™ Tool helps design the power stage of the most commonly used switchmode power supplies. It is also a great assistance for getting a deeper understanding of voltages and current flows inside converters.

How To Use

  • Choose the adequate topology on the main screen or in the "Topology" menu for your demands.
  • Fill in the "Design Values" with your specification and requirements. When you place the cursor on a respective input field, on some fields a note with hints will appear.
  • The inductance of the output filter is calculated to stay below the specified current ripple over the entire input voltage range.
  • The turns ratio of the transformer is calculated to stay below the specified maximum duty cycle over the entire input voltage range.
  • Check the "Recommended Values" section for the suggested values of turns ratio, inductance and/or transformer inductance.
  • The transformer inductance is calculated to achieve the specified magnetization current over the entire input voltage range.
  • Fill in the input fields of the section "Choose Values". Use the "Recommended Values" to choose an adequate inductor and/or transformer from your supplier.
  • Please note that if a field turns red you might need to reconsider your inputs and results.
  • Underneath the schematic of the switch mode power supply, under the section "Calculated Values", all relevant information is shown. You will see for example the duty cycle, input power, losses on the diodes, current ripple and much more. Depending on the topology different information is shown. With the shortcuts CTRL+1, CTRL+2, CTRL+3 the input voltage can be changed between minimum, average and maximum input voltage. The average input voltage is the arithmetic mean of the minimum and the maximum input voltage.
  • The yellow highlighted parts on the schematic are clickable. A new window appears and shows the voltage and current of the selected component. Additional information is shown below the graphs. The input voltage can be changed with the slider by using the mouse or the arrow keys of the keyboard.
  • The "Info" button opens a new window and shows additional information about the selected topology such as links to application notes, EVMs, designs and datasheets.

Please keep in mind:

  • Only diode forward losses are considered, MOSFET and inductor losses are excluded.
  • Click on the yellow highlighted areas to show the graphs of the voltage and the current of the selected device.
  • The input voltage can be changed with CTRL+1, CTRL+2, CTRL+3 or continuously with a slider.

Technical Documents
User guides (2)
Title Abstract Type Size (KB) Date Views
PDF 23757 05 Jul 2016 14,375
PDF 4308 03 May 2016 16,564

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