Philips Thermal Design Guide v2.2 - Fortimo SLM Platform Owner's Manual
Summary
This essential thermal design guide provides engineers with comprehensive specifications for integrating Fortimo SLM LED modules into commercial lighting fixtures. The manual covers detailed thermal performance requirements, methods for measuring critical temperatures ($T_c$), best practices for selecting Thermal Interface Materials (TIM), and step-by-step instructions for designing both passive and active cooling solutions. It is designed for lighting product developers who need to ensure optimal reliability and efficiency across varying power outputs and ambient conditions.
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Thermal Design Guide v2.2 Fortimo SLM platform
Fortimo SLM Team GBU LED Systems Philips Lighting B.V.
Page Summary Contents For Philips Thermal Design Guide v2.2 - Fortimo SLM Platform Owner's Manual
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Thermal Design Guide v2.2 Fortimo SLM platform Fortimo SLM Team GBU LED Systems Philips Lighting B.V.
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Contents Thermal specifications How to measure Tcase at its critical temperature point Tc? Thermal interface materials (TIM) Designing a passive cooled luminaire Designing an active cooled luminaire C...
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Thermal specifications Fortimo SLM platform Fortimo SLM Platform 800 lm 1100 lm 1500 lm 2000 lm 3000 lm Dissipated thermal power (maximum) 10 W 17 W 18W 31 W 40 W Dissipated thermal power (typical) 8 ...
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Thermal specifications Fortimo SLM platform Tcase 65o C (max. surface temperature on aluminum interface) Max. ambient condition 35o C ambient Max. Tcase 65o C Aluminum thermal 3 screw holes for attach...
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Thermal specifications Fortimo SLM platform A maximum surface temperature of 65o C to be guaranteed on the interface between the ‘Module’ and the ‘TIM + cooling solution’ at maximum ambient of 35o C A...
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How to measure critical temperature point Tc? The Tcase should be measured at its critical temperature point, centre point at the bottom of the module This can be done by making a thin v-groove in the...
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Thermal Interface Materials (TIM) Function is to reduce thermal impedance between two solid surfaced Replaces air (thermal insulator c=0.024W/m K) by filling the gaps with better conductive thermal in...
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Thermal Interface Materials (TIM) In practice: Actual thermal impedance [o C/W] of TIM in application is more important than conductivity of material Each thermal interface can have a significant cont...
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Contact information complementary partners Thermal interface materials (TIM) The Bergquist Company www.bergquistcompany.com North American Headquarters Contact person for Europe 18930 W. 78th Street N...
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Contents Thermal specifications How to measure Tcase at its critical temperature point Tc? Thermal interface materials (TIM) Designing a passive cooled luminaire Designing an active cooled luminaire C...
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Designing a passive cooled luminaire Design based on Fortimo SLM 1100lm: Performance requirement cooling Rth < 1.75 o C/W Assuming a conservative heat transfer coefficient (htc) = 5 W/m2K and the c...
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Design of Experiments (Do E) Based on the previous calculation a minimum surface area of 0.121m2 is required This corresponds to a cylinder of ø120mm and 322mm long In order to reduce overall size of ...
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Design of Experiments (Do E) Results Do E Design A Design B Area [m2] 0.236 0.236 0.158 0.158 Emissivity [-] 0.1 0.9 0.1 0.9 Rth [o C/W] 1.33 0.99 1.76 1.39 heatsink HTC average [W/m2K] 3.2 4.3 3.6 4....
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Detailed analysis Both designs are feasible, but choice is to focus on design B The fins are place in line with the flow direction for maximum efficiency, this way it is possible to keep the overall l...
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Passive cooled luminaire designs After design optimization a passive luminaire design could look like this: Another passive cooled design, but with heat pipes: Confidential Philips Lighting B.V., GBU ...
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Some design guidelines for passive cooling Limit the # of thermal interfaces in the thermal path from module to ambient => strongly recommended Thick fins conduct heat better than thin fins Large s...
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Contents Thermal specifications How to measure Tcase at its critical temperature point Tc? Thermal interface materials (TIM) Designing a passive cooled luminaire Designing an active cooled luminaire C...
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Designing an active cooled luminaire Design based on Fortimo SLM 2000lm: Performance requirement cooling Rth < 0.95 o C/W Assuming passive cooling conditions: Heat transfer coefficient (htc) = 5 W/...
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CFD analysis CFD analysis can be a great way to help design a good active cooled luminaire A possible design is shown below The complete cooling solution has reduced to a small, compact and light weig...
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Active cooled luminaire designs •Goal of an active solution is to actively move air over the cooling surfaces to increase the heat transfer coefficient, therefore enabling small, compact and light wei...
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Some design guidelines for active cooling Design considerations for active cooling are: Provisions in luminaire design for inlet and outlet of respectively cool and hot air Ensure smooth airflow from ...
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Some design guidelines for active cooling Design considerations for active cooling are: Provisions in luminaire design for inlet and outlet of respectively cool and hot air (1) Ensure smooth airflow f...
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Thermal solution validation When testing the thermal performance of your luminaire pay special attention to these 2 numbers: Max temperature of the module Tc=65o C Max ∆T = 30o C (Tc=65o C when your a...
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Complementary partners for thermal solutions Overview of our complementary partners and their cooling solutions that are especially designed for the Fortimo SLM platform AVC (active and passive soluti...
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SLM 3000lm to be released soon Confidential Philips Lighting B.V., GBU LED Systems, Fortimo SLM Team 25
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Sunon SLM 2000lm gen 2 (TA003-10003) SLM 3000lm (TA004-10003) solution, improved for use in track Prototypes available luminaires Limited engineering samples available end march 2011 MP release in Apr...
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Nuventix Solution for SLM 800lm, 1100lm and 1500lm Solution for SLM 2000lm open air applications 3000lm under development Confidential Philips Lighting B.V., GBU LED Systems, Fortimo SLM Team 27
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Syn Jet® Airflow Basics – Enclosure Guidelines Inlet Vents Troom Intake Air Tlocal Inlet vents can either be on back, sides or both Exhaust vents can be on sides, front or both Vents should be designe...
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Wisefull Technology Ltd. Active solution But also passive Solutions for SLM 800lm, 1100lm and 1500lm Solution for SLM 2000lm under development Confidential Philips Lighting B.V., GBU LED Systems, Fort...
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Frigo Dynamics Gmb H Flux Tc = 3000 K Tc = 3500 K Tc = 4000 K 800 (Lp W, typical 72 lm/W 75 lm/W 79 lm/W lamp wattage, and thermal load) 1100 (Lp W, typical 63 lm/W 65 lm/W 70 lm/W lamp wattage, and t...
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Contact information complementary partners Cooling solutions HEADQUARTER Contact person for Europe Contact person for N.A. & Asia AVC KAOHSIUNG Beatrice Tseng Jeff Chou No.248-27, Hsin-Sheng Rd., ...
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Confidential Philips Lighting B.V., GBU LED Systems, Fortimo SLM Team 32
Manual Details
| Brand | Philips |
|---|---|
| Pages | 32 |
| File Size | 1.34 MB |
| Published | July 06, 2026 |
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Frequently Asked Questions
What is the maximum surface temperature allowed on the module interface?
A maximum surface temperature of 65°C must be guaranteed at the Module/TIM + cooling solution interface.
How should I measure the critical temperature point T_c?
Measure it at its bottom center point by making a thin v-groove or small drill hole in the heat sink for thermocouple placement.
What are the requirements for high power consumption, like 3000 lm?
For 3000 lm (40W), the cooling solution must ensure a thermal resistance of Rth case to ambient ≤ 0.75 [°C/W].
Does the driver dim if the temperature gets too high?
Yes, all types of Fortimo SLM drivers will dim when a temperature over 65°C is sensed by the SLM module.