TITLE

Thermal ICs address reliability, time-to-market issues

AUTHOR(S)
Nass, Richard
PUB. DATE
January 2005
SOURCE
Portable Design;Jan2005, Vol. 11 Issue 1, p41
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
The article reports that cooling a portable system can be a tricky endeavor, but by no means is it impossible. The two key areas of concern when dealing with a fan in a portable box have to do with the power consumption of the fans and the noise that the fans generate. With respect to the power, one wants to run the fans long enough so they keep the system at an acceptable temperature level but no so long that you're unnecessarily burning power. The noise part is self-explanatory--less on-time for the fans means a quieter system. One of the more complex thermal issues facing designers is the variance in substrate and discrete diode ideality factors, which make it difficult to accurately measure temperature. Using the ideality configuration feature, the three sensors can compensate for these errors over the entire temperature range instead of correcting the temperature reading at only one temperature point. The end result is a more reliable and more accurate system. Temperature measurement errors can also occur through resistance effects of the traces to the diodes, which are used to measure temperatures.
ACCESSION #
15777290

 

Related Articles

  • Analog output CMOS temp sensors.  // Portable Design;Jan2005, Vol. 11 Issue 1, p7 

    The article presents information on analog output CMOS temp sensors. The digital local temp sensors LM71 Features: 13-bit + temperature resolution {0.03125°C per LSB), low operating current, extremely fast conversion rate.

  • MECHATROMC SYSTEM USED FOR MAINTAINING CONSTANT TEMPERATURE WITH THE LM 335 SENSORS. SPANU, Alina // Annals of DAAAM & Proceedings;Jan2009, p1833 

    The process of maintaining a constant temperature requires a great accuracy level, so that a mechatronic feed-back system is useful. The temperature sensors LM335 were included due to their technical performances. We have studied the theoretical aspects regarding the computation of temperature...

  • Determination of the hot gas concentration from the difference between contact and remote measurements of the temperature. Voitsekhovskii, A. V.; Voitsekhovskaya, O. K.; Zaprjagaev, A. Yu. // Russian Physics Journal;May2008, Vol. 51 Issue 5, p544 

    A method of determining small concentration of hot gases from the difference between indications of sensors whose operation principles are based on contact and remote methods of measuring the temperature of a gas volume is suggested in the paper. It is assumed that the contact measurements allow...

  • Resistance Temperature Detectors. Cigoy, Dale // Control Engineering;Nov2005, Vol. 52 Issue 11, p73 

    The article provides information on resistance temperature detectors (RTD). The resistance of the device is proportional to temperature in an RTD. They require an external stimulus to function properly. But current generates heat in the resistive element, which causes an error in the temperature...

  • Performance of DØ detector in Run II. Buchholz, D. // European Physical Journal C -- Particles & Fields;Mar2004 Supplement 1, Vol. 33, ps984 

    The DØ experiment, upgraded for Run II, has resumed data taking with a much improved detector. The upgrade components and their performance are described. PACS: 29.40.Gx Tracking and position-sensitive detectors – 29.40.Vj Calorimeters

  • Sensors Have to Toughen Up. Black, Robb // Design News;8/18/2003, Vol. 59 Issue 12, p16 

    Presents insights on trends in sensors. Issue on the robustness of sensors; Way to make sensors more robust; Environmental demands that are pushing the industry toward more robust sensors; Importance of sensors.

  • Simple. Not Stupid. Legg, Gary // Design News;1/13/2003, Vol. 59 Issue 1, p101 

    Reports on plug-and-play sensors. Characteristics of the sensors; Applications of the sensors; Advantages of the sensors.

  • Thermal behavior of selected Czech marble samples. Plevová, E.; Kožušníková, A.; Vaculíková, L.; Martynková, G. Simha // Journal of Thermal Analysis & Calorimetry;Aug2010, Vol. 101 Issue 2, p657 

    The definition as well as prediction of rock thermal behavior seems to be a quite difficult problem significantly effected by rock composition and structure. Temperature increase causes various changes of rock material (such as decomposition, oxidation, phase and polymorphic transformation,...

  • A possibility of application of MTDIL to the Residual stresses analysis. Myśliński, P.; Precht, W.; Kukielka, L.; Kamasa, P.; Pietruszka, K.; Ma&slash;lek, P. // Journal of Thermal Analysis & Calorimetry;Jul2004, Vol. 77 Issue 1, p253 

    The work demonstrates a proof of application of the modulated-temperature dilatometry (MTDIL) to the stresses investigations of the well known and commonly used hard coatings e.g. TiN, TiCN, TiAlN thin films deposited mainly on different type of tools for its higher performances. In the PVD...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics