Passives SimSurfing simulation tool gets new functionalities

September 21, 2018 // By Julien Happich
Murata has added extra functionality to its popular on-line ‘SimSurfing’ tool, simulating the company’s capacitor, inductor and filter components.

The previous version of the tool allowed visualisation of individual component performance characteristics for impedance, transmission and reflection variation, with frequency and other operating conditions. The new tool also simulates the application circuits, particularly DC-DC converters, where components selection is critical for efficient and minimal size/cost designs.
SimSurfing is now able to simulate DC-DC converter behaviour at high speed with user-specified variables such as input/output voltages, switching frequency and starting values for filter inductance and capacitance. A particular feature is the ability of the software to predict inductor power loss. This is normally a difficult value to calculate from published data, leaving designers no choice but to measure prototype performance with a selection of components, slowly iterating to an optimum solution. Further enhancements to the DC-DC simulation feature are planned such as inclusion of load transient response, vital for confirmation of converter stability and large signal performance. 

Another up-coming feature of SimSurfing is the ability to simulate the performance of combinations of Murata components in noise filter networks. Inductors, capacitors, beads and common-mode chokes can be chosen freely from the Murata range in suggested circuit configurations and their combined performance analysed for impedance and loss variation with frequency. In addition, the tool gives specific support for CISPR25, the international standard for radio disturbance characteristics in automotive and other transport applications.

SimSurfing is available free of charge at 

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