1. About Power Shift Dimensioning

The Power Shift Dimensioning tool calculates the external resistors needed for the Power Shift feature of the LITIX™ Basic+ TLD1114-1EP based on the system requirements. In addition, it provides a graphical representation of the output current split between the internal power stage and the power shift circuit as well as the power loss over the device and the power shift resistors over the supply voltage.

For the calculation, select the configuration of the power shift –  With MOSFET or Without MOSFET - from the Schematic section and then enter the system requirements in the blue-colored parameters:

Parameters RDSON and VGS(typ) have to be configured only for the configuration With MOSFET. A low VGS(typ) voltage (for the With MOSFET configuration) is especially important when high currents are used, as otherwise the power loss of the driver might exceed the desired limit. This can happen when the power shift circuit is activated at higher supply voltages due to a higher VGS.

Based on the inputs, the power shift resistors R1 and R2  (R1 only for the configuration Without MOSFET) are calculated as well as the output current reference resistor RSET.

The Current split chart shows the current split between the TLD1114-1EP internal power stage and the power shift circuit over VS. The Power loss split chart shows the Power loss of the TLD1114-1EP and the power resistors R1 and R2 over VS.

The configuration is indicated as pass or fail in the Summary section. The recommended configuration for the CFG and OUTL/OUTH pins is provided as well as the calculated maximum power loss of the TLD1114-1EP and the power resistors R1 and R2.

For further information regarding the Power Shift feature please consult the LITIX™ Basic+ TLD1114-1EP data sheet and the LITIX™ Basic+ TLD1114-1EP Power Shift application note in the following links:

2. Tool functions/controls

In this section you can find GUI controls of the tool with explanation.


Explanation of the GUI controls:

  1. Calculation steps - open an overlay with calculation steps and algorithms explained.
  2. About the tool - open an overlay with information about the tool (can also be found on this site in the section 1).
  3. With MOSFET - start the calculation with a MOSFET.
  4. Without MOSFET - start the calculation without a MOSFET.
  5. Use recommended resistor values - if ticked the tool will disable user input for resistors R1 and R2 and calculate recommended values instead.
  6. Input parameters - when clicked on the blue text of parameters a number box will open right over it. There you can enter a new value for the selected parameter. Apply the new parameter value by pressing the enter key.
  7. Reset button - reset input parameters to their default values.
  8. Current split - show the Current split chart tab.
  9. Power loss split - show the Power loss split chart tab.
  10. Chart legend - by clicking on a single legend item you can toggle showing specific data of the chart.
  11. Product info - link to a web page of the currently selected product.
  12. Product family - link to a web page of the LITIX™ Basic+ product family.
  13. Application Note - quick link to the Application Notes section on the web page of current product.
  14. Simulation Model - quick link to the Simulation Model section on the web page of current product.
  15. TINA™ Simulator - simulate current circuit configuration using online tool TINA.

2.1 Calculation steps

Open an overlay with calculation steps and algorithms explained.

 

2.2 About the tool

By clicking on the question mark icon in the right top corner you can open a pop-up dialog box where you can find detailed tool description.

2.3 With MOSFET

Switch to a tab with calculation with MOSFET.

 

2.4 Without MOSFET

Switch to a tab with with calculation without MOSFET.

2.5 Use recommended resistor values

If the checkbox is ticked then the resistors are disabled for user input and they turn into output parameters. Therefore, after you change any of the input parameters, the resistor values will be re-calculated and applied to the current circuit configuration automatically.

If the checkbox is not ticked then user input for resistors is enabled and you can still see the recommended resistor value (for current circuit configuration) within the bubble by hovering over a resistor's input box.

2.6 Input parameters

Input parameters have blue text color. To edit value of one specific parameter click anywhere on the text of the desired parameter.

After that a new pop-up input box will appear right over the parameter where you can edit its value. Here you can enter your new value and then press enter key to apply.
When you hover over an input box a bubble with Min and Max values appears.

And if you enter an invalid value the border will change its color to red to indicate error and that the value is not applicable. Therefore, pressing enter key to apply the value in this case will neither apply the value nor close the input box.

2.7 Reset button

Click on the link under the schematic to reset current device's parameters to default ones.

2.8 Current split chart

Switch to a tab with Current split chart.

2.9 Power loss split

Switch to a tab with Power loss split chart.

2.10 Chart legend

Clicking on one of the chart legend items can be used to toggle on/off data lines.

2.11 Product info

Web page of the selected product will open in your default browser.

2.12 Product family

Web page of the LITIX™ Basic+ product family will open in your default browser.

2.13 Application Note

Web page section Application Notes of the selected product will open in your default browser.

2.14 Simulation Model

Web page section Simulation Model of the selected product will open in your default browser.

2.15 TINA™ Simulator

TINA™ Simulator will open in your default browser where you can start simulation using your current circuit configuration.

3. Calculation results

There are 3 result sources in the Power Shift Dimensioning tool.

3.1 Schematic

Inside Schematic area results are shown in the form of output parameters with red text. Such parameters update as soon as new value for an input parameter has been applied.

3.2 Chart

In the Chart area you can find two tabs: Current split and Power loss split.

To get more accurate results, in form of a number, you can put your mouse cursor near a point on the chart.

3.3 Summary

Inside Summary area you can find out if your current circuit setup would pass or fail. The next picture shows summary when setup passes.

The next picture shows summary when setup fails.

4. Shortcuts

You can use keyboard shortcuts to make your work easier. Here is the list of currently supported shortcuts:

5. Export control

The Software contained in this package may be subject to export control:

ALNR: N

ECCN: EAR99

SI-class: N

Software classified with “ALNR not equal to N“ are subject to European or German export authorization when being exported out of the EU.

Software classified with “ECCN not equal to N“ are subject to US re-export authorization.

Software classified with “SICLASS not equal to N" are subject to Singaporean Strategic Goods Control authorization when being exported out of Singapore.

Even without a label, or with label "ALNR:N" or "ECCN:N" authorization may be required due to the final whereabouts and purpose for which the goods are to be used.

Furthermore, the specified export control classifications are not binding, as export control regulations are subject to interpretations, changes and possible differences in national requirements. The ultimate determination of applicable export control classifications and related categorizations remains solely your responsibility.

Infineon makes no representation as to the accuracy or reliability of the information provided. You agree to use this information at your own risk and to hold Infineon harmless in the event of any damages or penalties incurred by any party based on your use or reliance on the information provided here.