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Controlling Power Transients: MIL-STD-1275 and MIL-STD-704A Compliance Issues of DC-DC Converters
By Jeremy Ferrell, Senior Design Engineer
VPT, Inc. Blacksburg, VA
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Topics include:
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Definition of military standards |
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Discussion of converter operation through various transient voltages |
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Clamping voltages with VPTi10 and VPTPCM products to meet standard specifications |
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Lab demonstration |
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VME Configurable Power Supply
By John Evans, Senior Design Engineer
VPT, Inc. Blacksburg, VA
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Topics include:
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Design, operation, and configurability of VPT’s new VME power supply |
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Explanation of features |
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Customizing the inputs and outputs |
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Lab demonstration |
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MIL-STD-461 Conducted Emissions
By Steve Butler, VP of Engineering
VPT Inc. Blacksburg, VA
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Topics include:
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Explanation of conducted emissions and filtering |
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Definition of MIL-STD-461 and subcategories CE01, CE02, CE101 and CE102 |
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Testing your system for EMI |
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Complete lab demonstration |
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DC-DC Converter Output Ripple
By Steve Butler, VP of Engineering
VPT Inc. Blacksburg, VA
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Topics include:
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Definition and causes of common mode and differential mode output ripple |
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Simple, effective ways to control output ripple |
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Lab demonstration |
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Thermal Considerations of Hybrid DC-DC Converters
By Sam Wood, Mechanical Engineer
VPT Inc. Blacksburg, VA
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Topics include:
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Thermal flow of DC-DC power converters |
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Considering thermal issues when mounting DC-DC converters |
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Using thermal pads and heat sinks |
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Lab demonstration |
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VPT100-2800 DC-DC Converter Technical Overview
By Callaway Cass, Senior Design Engineer
VPT Inc. Blacksburg, VA
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Topics include:
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Feature overview |
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Block diagram review |
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Lab demonstration of transient response and waveform of synchronous rectifiers |
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Trimming the Output Voltage of DC-DC Converters
By Callaway Cass, Senior Design Engineer
VPT Inc. Blacksburg, VA
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Topics include:
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Adjusting the voltage up or down to achieve non-standard output voltages |
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Connecting the trim resistor |
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Understanding the trim tables on the datasheet |
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Lab demonstration |
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Inrush current in DC-DC Converters
By Leonard Leslie, Sr. Design Engineer,
VPT Inc., Blacksburg VA
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Topics include:
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Definition of inrush current |
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Description of typical inrush current waveforms |
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The effects of inrush currents on EMI |
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Presentation of various solutions for limiting inrush current |
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MIL-PRF-38534 Specification Overview
By Shawn Graham, Executive Director of Quality.
VPT Inc. Blacksburg, VA
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Topics include:
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Definition of MIL-PRF-38534 |
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Overview of MIL-PRF-38534 components and appendices |
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Demonstration of constructing high power system
using multiple DC-DC converters
By Steve Butler, VP of Engineering
VPT Inc. Blacksburg, VA
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Topics include:
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Explanation of current sharing |
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Maintaining reliability |
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Configuring the outputs |
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Complete lab demonstration |
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Synchronizing DC-DC Converters
By Leonard Leslie, Sr. Design Engineer,
VPT Inc., Blacksburg VA
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Topics include:
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Synchronizing frequency capabilities in DC-DC converters |
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How to hook up converters for synchronized switching frequencies |
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Sync out procedures |
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Sync input signal specifications |
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Lab demonstration of sync functions |
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Advantages of Procuring Hybrid Microcircuits
to an SMD
By Shawn Graham, Executive Director of Quality
VPT Inc. Blacksburg, VA
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Topics include:
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Definition of an SMD (Standard Microcircuit Drawing) and DSCC |
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Purpose of an SMD |
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The SMD process |
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Specific customer advantages of procuring parts listed on an SMD |
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How to research an SMD |
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Connecting DC-DC Converters in a Series
To Obtain Various Output Voltages
By Jeremy Ferrell, Sr. Design Engineer
VPT Inc. Blacksburg, VA
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Topics include:
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Connecting dual output DC-DC converters |
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Configuring a dual output converter to provide a single output |
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Stacking multiple converters to achieve higher output voltages |
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Discussion of isolated vs. non-isolated converters |
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The Effects of Cross Regulation
on Dual Output DC-DC Converters
By Steve Butler, VP of Engineering
VPT Inc. Blacksburg, VA
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Topics include:
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Design overview of dual output dc-dc converters |
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Definition of cross regulation |
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Power loading effects on cross regulation |
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Tips for optimal converter operation |
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