Vicor | Application Notes

	Meeting Transient Specifications for Electrical Systems in Military Vehicles Electrical systems in military vehicles are normally required to meet stringent transient requirements. Typical of these specifications are MIL-STD-1275B in the U.S.A. and DEF-STAN 61-5 (Part 6) Issue 5 in the UK. Although the specified levels of these surges and spikes are outside the capability of Vicor 2nd Generation modules, it is quite possible, with simple circuitry, to make the 24 V input (18-36 V input range) DC-DC converter modules compliant to these specifications for the 28 V vehicle voltage system.
	Current Share Board "Current Sharing" also known as Load Sharing, is the ability to divide the output current evenly across all active power supplies. This greatly reduces stresses on each power supply and allows them to run cooler resulting in higher reliability. Standard "Current Sharing" techniques typically utilize shunt resistors or Hall Effect devices to measure the current from each power supply. Power shunt resistors continually dissipate power and require cooling especially when dealing with high output currents of >100 Amps.
	Adjustable Latching Output Over Current Circuit Many users, for logistical reasons, employ a particular module for many applications at significantly lower power than the unit is able to provide. The potential damage to down stream PCB traces and components caused by the module high current source capability creates a need for an adjustable latching output current limit circuit.
	Active PFC for Electronic Power Supplies When choosing a strategy for PFC, it is essential to recognize that the poor power factor occurring in electronic power conversion equipment is entirely different from the traditional poor power factor seen with inductive motor loads, and requires a different corrective approach.
	Controlling the BatMod with a Digital Potentiometer The BatMod is a modular, component level DC-DC converter that provides a programmable output voltage and current limit suitable for battery charging or other applications that require constant current with external control.
	Designing a Battery Charger Vicor's BatMod current source module enables designers to easily build a compact, lightweight battery charging system with commonly available parts.
	Using Modular DC-DC Converters to Meet European Standards for Railway Applications This application note shows how to comply with these standards using modular Vicor DC-DC converters to facilitate the design of complex power supplies.
	Creating High Voltage Outputs This application note describes two approaches to producing a high voltage output. One solution provides a fixed output voltage, the other an adjustable output voltage.
	Designing a Power Supply with Multiple Input Options Some electronic systems such as field communications equipment must be able to operate from a variety of power sources. These systems may also require backup power in case the primary source is interrupted.
	Meeting Conducted Noise Standards Finding an efficient, compact solution to meeting EMI requirements is a greater challenge than ever. Here's how to meet the strict limits of FCC/VDE Class B using industry standard high density components.
	Powering Dynamic Loads This document illustrates Vicor converters' current limiting safety feature and design strategies that will allow your power system to maintain stable output voltages and sufficient available power levels in applications with widely and/or rapidly fluctuating loads.
	Soldering Methods and Procedures for 1st & 2nd Generation Modules This document is intended to provide guidance in utilizing soldering practices to make high quality connections of Vicor 1st & 2nd Generation power modules to printed circuit boards.
	For 2nd Generation Products
	Converter PR Pin Facilitates Parallel Operation for Power Expansion or Redundancy A unique feature has been designed into Vicor's 2nd Generation converter modules which facilitates parallel operation for power expansion or redundancy.
	Hot Swap Capability Eliminates Downtime Hot swap capability imposes special needs to insure survival of the component which is subjected to live insertion and extraction. In addition, it is necessary to prevent any significant disturbance of either input or output power rails during live insertion/extraction.