RF InductorInductor Selector Tool "MPST" for DC-DC converter

Are you troubled with selection of power inductors on designing circuits of DC-DC converters?

First of all, what is the "ideal" power inductor?

An inductor with low loss in the focused on load area having conditions, such as an inductance value with a balanced load response and ripple, sufficient DC superimposing characteristics and rated current to an assumed current, and a designable size.

However, the "focused on load area", "point of balance of the load response and ripple", "current margin" and the "designable size" differs by the application and the design concept of the designer.

The "ideal" power inductor changes with various conditions and requirements. The Murata Power Inductor Selection Tool (MPST) is a tool for supporting the process to select the ideal power inductor in consideration of these complex factors.

First of all, what is the "ideal" power inductor?

MPST Functions

- 1. The inductors conforming to the conditions will be listed in the order of low loss, by just inputting the specification of the power supply IC. -

<Output Results Image> <Output Results Image>

- 2. Detailed characteristics fluctuation data can be evaluated and compared. -

<Data Sheet by Individual Components> <Data Sheet by Individual Components>
<Detailed Data Comparison between Components> <Detailed Data Comparison between Components>

Excellent Points of MPST

- 1. Accurate characteristic values extremely close to the actual use conditions can be output. -

Ex.: Comparison between MPST Output Results and Measurement Results Ex.:
Comparison between MPST Output Results and
Measurement Results

MPST uses the "characteristics measurement results of the inductor in various operating conditions*" as the original calculation data, and characteristic values close to actual conditions can be output.

  • * Based on the measurement method independently developed by Murata.

- 2. Various characteristic fluctuations assuming actual use can be output. -

MPST can also evaluate changes of the component characteristics by fluctuations in the conditions possibly taken by the DC-DC converter.

Ex. 1: Changes in loss when the output current of the DC-DC converter is changed. Ex. 1:
Changes in loss when the output current of the
DC-DC converter is changed.
Ex. 2: Changes in loss when the input current of the DC-DC converter is changed. Ex. 2:
Changes in loss when the input current of the
DC-DC converter is changed.

Download of MPST

Download Software

Please download MPST from the Murata Web site "design support tool" page.

  • * MPST is VBA application (macro) to run on Microsoft Excel. More than Microsoft® Excel® 2003 are necessary to run MPST. It is necessary to enable macro-practice in Microsoft® Excel® to run MPST. Please refer to a handling method of Microsoft® Excel® for the method to enable macro-practice.

Web Software

Some part of MPST is integlated to web base design assistance tools "SimSurfing".

How to use MPST

If you would like to know more detail;

If you want to know more detail about MPST, refer to the following "Introduction of the DC-DC Converter Inductor Selection Tool -Detailed Version-".