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Electrical Power Solutions: Interpoint

Electrical Power Solutions: Interpoint

Application Notes


This application note defines some of the common terminology used to describe the characteristics and operation of DC-DC converters.

Distributed power architectures (DPA) replace multiple central power sources with a single bulk supply that is converted to the end-use voltages by DC-DC converters located at the point of need. This application note discusses the use of DPA.

When MIL-STD-461 or other EMI specification is required, an additional power line filter may be needed for the DC-DC converter as well as output and/or protection filters for the other terminals.

DC-DC converters are natural generators of input narrowband spectral noise currents having components at the fundamental switching frequency and higher order harmonics. The low noise of Interpoint converters can be lowered even further.

The inhibit function allows shutdown of the DC-DC converter without interrupting the connection to the input powerbus. The synchronization function allows the converter to be synchronized to an external clock or other devices.

The inrush current for a pulse width modulated (PWM) DC-DC converter is the result of the charging of the input capacitors and/or filter elements and the power converter input current time profile.

In order to determine if an external output filter is needed for a DC-DC converter, an understanding of the nature of output noise and its proper measurement will be helpful. Differential mode (DM) and common mode (CM) noise are discussed.

This application note addresses how to prevent damage to the DC-DC converter or EMI filter when mounting the product or when the product is subject to vibration and shock.

An overview of Interpoint® products Quality Assurance systems, certifications, qualifications, standards and screening tables for DC-DC converters and EMI Input filters.

Outlines our product compliance to Restriction of Hazardous Substances (RoHS), Waste Electrical & Electronic Equipment (WEEE) and Registration, Evaluation and Authorization of Chemicals (REACH) Initiatives