This white paper is the second in a two-part series exploring the standards and design considerations related to MIL-STD-704 and DO-160 power supply hold-up.
The first white paper helped system designers to better understand the terminology and requirements specific to the parameter commonly referred to as MIL-STD-704 and DO-160 “hold-up”. The system designer was guided through the process of determining if there was a need to specify a holdup capability within the power supply system, and what standards defined and bound the technical requirements. This white paper builds upon the first one by discussing rudimentary and advanced hold-up capacitance design architectures. It briefly covers how to calculate the amount of energy needed to provide hold-up for a given wattage and duration. Useful formulas are provided to assist the designer in performing these calculations. If your system design requires power supply hold-up for use on an airborne platform, this white paper is an excellent way to begin understanding the requirement and how it might affect system size, weight and power.
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