Trister_osram
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Mentor Graphics Mechanical Analysis 81 Bridge Road Hampton Court Surrey KT8 9HH, UK Tel: +44 (0)20 8487 3000 Fax: +44 (0)20 8487 3001 [email protected] Mentor Graphics MicReD Division Infopark D, Gábor Dénes utca 2. fszt. 1. Budapest XI. H-1117 Hungary Tel: +36 1 815 4200 Fax: +36 1 815 4299 [email protected] T3Ster Thermal Transient Tester Helps Design and Manufacture Better High-Performance Light-Emitting Diodes (LEDs) Customer Testimonial “As LEDs become more powerful, more attention should be paid to thermal management, which is essential to ensure stable LED per- formance and long lifetime. This is why OSRAM is devoting consider- able attention to thermal design. T3Ster's accuracy and repeatability enable us to verify our thermal designs and confirm the stability and reliability of our products. By testing in bulk we get increased statistical confidence in the measurement results. The structure functions built into the T3Ster software are extreme- ly powerful for identifying different thermal attach issues during our extensive reliability testing.” Dr. Thomas Zahner, Quality Manager Osram Opto Semiconductors GmbH, Regensburg, Germany T3Ster MicReD ® Products North American Thermal Test Facility 880 Ridder Park Drive San Jose, CA 95131 USA Tel: +1 (408) 436 1500 Fax: +1 (408) 487 7001 [email protected] www.mentor.com/micred Design Challenge LEDs have become important for lighting in a diverse set of applications such as traffic lights, outdoor displays and car headlamps. Lighting applications deliver high light output, requiring far higher elec- trical input power, exceeding 10W per LED in some cases. The design challenge is to achieve highly efficient light output having the required photometric, colorimetric and radiometric characteristics, coupled with effective removal of the generated heat. Unlike conventional incandescent bulbs where radiative heat losses dominate, LEDs need to operate at much lower tem- peratures to ensure high light output and quality, so the LED package's thermal performance is critical: good conductive cooling through multiple thermal interfaces has to be provided in a stable, reliable product. Solution and Benefits MicReD's thermal transient tester, T3Ster and the associated results evaluation soft- ware provide an unparalleled solution for LED thermal characterization. LEDs have very small thermal time-constants, and T3Ster 's ability to measure transient tem- perature change with high accuracy and high data density from 1 s allows the most relevant part of the junction temperature transient below 100 s to be captured. All thermal interfaces in the heat flow path can be precisely quantified including the LED die-attach. To obtain exact thermal metrics that cor- rectly account for the emitted optical power, T3Ster can be combined with the TERALED system to provide a full radio- metric characterization of the LED during the thermal transient testing. OSRAM have tested a large number of samples with T3Ster and used acoustic microscopy to verify T3Ster 's measurement capabilities. ®
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Mentror graphics hardware tool
Transcript of Trister_osram
Mentor Graphics Mechanical Analysis81 Bridge RoadHampton CourtSurrey KT8 9HH, UKTel: +44 (0)20 8487 3000 Fax: +44 (0)20 8487 [email protected]
Mentor Graphics MicReD DivisionInfopark D, Gábor Dénes utca 2. fszt. 1.Budapest XI. H-1117 HungaryTel: +36 1 815 4200 Fax: +36 1 815 [email protected]
T3Ster Thermal Transient Tester Helps Designand Manufacture Better High-PerformanceLight-Emitting Diodes (LEDs)
Customer Testimonial
“As LEDs become more powerful,more attention should be paid tothermal management, which isessential to ensure stable LED per-formance and long lifetime. This iswhy OSRAM is devoting consider-able attention to thermal design.T3Ster's accuracy and repeatabilityenable us to verify our thermaldesigns and confirm the stability andreliability of our products. By testingin bulk we get increased statisticalconfidence in the measurementresults. The structure functions builtinto the T3Ster software are extreme-ly powerful for identifying differentthermal attach issues during ourextensive reliability testing.”
Dr. Thomas Zahner, Quality ManagerOsram Opto Semiconductors GmbH,Regensburg, Germany
T3Ster
MicReD® Products
North American Thermal Test Facility880 Ridder Park DriveSan Jose, CA 95131USATel: +1 (408) 436 1500Fax: +1 (408) 487 [email protected]
www.mentor.com/micred
Design Challenge
LEDs have become important for lightingin a diverse set of applications such astraffic lights, outdoor displays and carheadlamps. Lighting applications deliverhigh light output, requiring far higher elec-trical input power, exceeding 10W per LEDin some cases. The design challenge is toachieve highly efficient light output havingthe required photometric, colorimetric andradiometric characteristics, coupled witheffective removal of the generated heat.Unlike conventional incandescent bulbswhere radiative heat losses dominate,LEDs need to operate at much lower tem-peratures to ensure high light output andquality, so the LED package's thermalperformance is critical: good conductivecooling through multiple thermal interfaceshas to be provided in a stable, reliableproduct.
Solution and Benefits
MicReD's thermal transient tester, T3Sterand the associated results evaluation soft-ware provide an unparalleled solution forLED thermal characterization. LEDs havevery small thermal time-constants, andT3Ster 's ability to measure transient tem-perature change with high accuracy andhigh data density from 1µs allows the mostrelevant part of the junction temperaturetransient below 100µs to be captured. Allthermal interfaces in the heat flow pathcan be precisely quantified including theLED die-attach.
To obtain exact thermal metrics that cor-rectly account for the emitted opticalpower, T3Ster can be combined with theTERALED system to provide a full radio-metric characterization of the LED duringthe thermal transient testing. OSRAM havetested a large number of samples withT3Ster and used acoustic microscopy toverify T3Ster 's measurement capabilities.
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