Page 15 - PEN eBook October 2022

Design POWER SUPPLY

Figure 7: Model and measure comparison
Controlling Conducted

TX/RX windings).
Noise in Military-Grade

DC/DC Switching Power

Supplies Using Multiphase
References

Synchronization Techniques
▶ Collins, L. (2007). “Cut the cord.” Electronic Systems and Software, Vol. 5,
1
No. 6, pp. 42–46.
By Christian Jonglas, technical support manager at Gaia Converter
▶ Kim et al. (2015). “Wireless lithium-ion battery charging platform with
2
adaptive multiphase rapid-charging strategy.” 2015 IEEE Energy Conversion Switching DC/DC converters in military applications must meet stringent standards for limits on
conducted input noise emissions, and they typically require input filter networks for compliance.
Congress and Exposition (ECCE), Montreal, Quebec, pp. 3087–3091, doi:
However, when inputs of DC/DC converters are paralleled, noise can combine in indeterminate
10.1109/ECCE.2015.7310092. ways, making filter design difficult. This article discusses the issue and describes a way to achieve

a consistent and substantial reduction in emissions using the phased switching-frequency
▶ Kamon et al. (1994). “FastHenry: A Multipole-Accelerated 3-D Inductance synchronization technique.
3
Extraction Program.” IEEE Transactions on Microwave Theory and Techniques,

Vol. 42, No. 9, pp. 1750–1758. DC/DC CONVERSION
Isolated and most non-isolated DC/DC conversion is achieved with switched-mode power

supplies (SMPS) for high efficiency, small size, and low weight. A wide range of SMPS circuit
▶ Bettini et al. (2017). “A Volume Integral Formulation for Solving Eddy Current
4
topologies can be used, and all generate electrical noise to some extent from transistor and
Problems on Polyhedral Meshes.” IEEE Transactions on Magnetics, Vol. 53, No. diode conduction transitions. Noise can be radiated or conducted along input and output
6, pp. 1–4, Art No. 7204904. lines, appearing as differential-mode (DM) noise between line and return conductors or
common-mode (CM) noise between line and return conductors together and ground.

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