Thermal Management Consulting


33 years of experience performing system level and electronics level thermal analysis, testing and model correlation on major projects for corporations and government agencies, including Hughes Aircraft, Lockheed Martin, US Navy, US Air Force and NASA.


As a mechanical engineer working on system level projects such as a spacecraft and their electronics I have observed the level of margin between measured temperatures and analytical predictions being minimized. In some cases there is negative margin that needs to be assessed with cost as a significant part of the risk management. Allow TMLLC to help accelerate your company to solutions.


Electronics Thermal Analysis Problem Areas

  1. Current carrying capacity in conductors and added power dissipated in the PWB
  2. Understanding standards for conductor sizing
  3. Managing high current pulses in conductors and components
  4. Conductor sizing and the parallel conductor rule
  5. Wedge lock thermal resistance values in air and in vacuum
  6. Measurements taken in a lab with infrared imaging equipment and not taking into account the emissivity of the surface being measured, as well as understanding the convective environment
  7. Component case-to-board thermal resistance in air and in vacuum
  8. Understanding electrical component thermal resistance values and how to apply them
  9. Understanding the impact of using an equivalent thermal conductivity for the board in a PCB thermal analysis vs modeling the actual conductor layers in detail
  10. Defining boundary conditions for different environments
  11. Comparing thermal analysis results for different environments
  12. Interpreting test results in air and vacuum


Solutions to these problem areas and more are the focus of Thermal Management LLC.  System level thermal analysis is performed using Thermal Desktop thermal analysis software by C&R Technologies, www.crtech.com.  Thermal Desktop is for large systems and for electronics boxes.  Thermal desktop is used to develop boundary conditions for PCB thermal analyses, which are performed using Thermal Risk Management (TRM) software developed by Adam-Research, www.adam-research.de.



TRM Software





TMLLC is teamed with Adam-Research and offers Thermal Risk Management (TRM) Software for sale in the United States and Canada.  This is the best PCB thermal analysis tool available for the price.


Seminars and Training


IPC-2152 Training

This is a one day training session that covers the origin of the old charts that were published in IPC-2221, IPC-D-275, Mil-Std-275 and others before those. In this seminar we take a look at the original data used to create the old charts and then take a look at the process that was followed to create the charts in IPC-2152.  This knowledge gives you the information you can use to work through trace heating design issues.


We will look at the temperature differences between the old and the new conductor sizing charts.  We will also get a look at what you can have if you were to develop your own technology-specific design charts.


You will be given a copy of the "trace heating database tool" and we will go through examples of how it's used.  We will discuss the significant differences between the IPC-2152 data and the data used in the old charts.  We will discuss how this data relates to trace heating in your boards, which leads to technology specific design charts and how they can be created and added to the trace heating database tool.


A personal computer is required for the training session. Bring your own, or a company laptop, so we can load the calculator on your computer for the training.  Make sure you have Administrative Privileges on your computer.


IPC-2152 Training with TRM


This is a two day training session.  IPC-2152 training with TRM and the Trace Heating Database Tool is focused on managing current carrying capacity problems commonly seen during the printed circuit board design process.  TRM has capabilities that I've been looking for for years.  Ease of use and the capability to solve high current pulses, swiss cheese effect, and more.   As a part of this training you will receive a copy of the "trace heating database tool" also known as the ThermalManagementCalculator.


A personal computer is required for the training session. Bring your own, or a company laptop, so we can load the calculator on your computer for the training.  Make sure you have Administrative Privileges on your computer.


The training provides the history behind all the common charts that are seen on the internet.  We will discuss the differences between the old IPC and Mil-Std charts, IPC-2152 charts.  You will learn:

  • Trace Heating Database Tool
  • History behind the majority of charts on the internet
  • History behind the Mil-Std-275, IPC-2221 and IPC-2152 conductor sizing charts.
  • How to develop technology-specific design charts using TRM


Short Courses

TMLLC also offers training and seminars for solving electronics heat transfer problems that lead to improved PCB thermal management.  Thirty three years of experience are available to companies and institutions interested in improving or enhancing their electronics thermal management plan.



TMLLC Home

System and Electronics Thermal Analysis and Consulting


Thermal Risk Management (TRM) Software


PCB Conductor Current Carrying capacity Solutions

Thermal Management LLC

 

Contact


PO Box 2892
Centennial, CO 80161 US

Phone: +1-303-359-3280
Email: mike@thermalman.com


Trace heating or conductor current carrying capacity in printed circuits is a specialty.  This and 33 years of personal experience with system level and detailed electronics thermal analysis is offered as a service that can be scheduled to help your company with your design needs.

Information

 
IPC-2152

Standard for Determining the Current Carrying Capacity in Printed Board Design


IPC 1-10b Task Group


1-10b Task Group Activities and

IPC-2152 Improvements:


The task group is active collecting flex circuit conductor heating data.  This will be the first of its kind set of flex circuit data.


IPC Test Methods

The task group has recently taken responsibility of updating two IPC test methods, IPC-TM-650 2.5.4 and 2.5.4.1a.


Printed Circuits Handbook


Chapter 16, Current Carrying Capacity in Printed Circuits, Printed Circuits Handbook, Clyde Coombs Jr., Rev 6, McGraw Hill Publishing 2009.


Chapter 16, Current Carrying Capacity in Printed Circuits, Printed Circuits Handbook, Clyde Coombs Jr., Rev 7, McGraw Hill Publishing (TBD).