ModuLED Micro Modular Passive Star LED Cooler …...Heat sink thermal resistance, Rhs-amb ( C/W)...
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No.818, Dashun 2nd Rd., Sanmin Dist., Kaohsiung City 80787, Taiwan [email protected] www.led-heatsink.com www.mechatronix-asia.com Tel: +886-7-381-5892 Fax: +886-7-383-9293 VAT: 28600841 ø86 x H30 / 50 / 80 (mm) Rth 1.8 - 1.5 - 1.2 °C/W Power Pd 28 - 33 - 42 W Thermal Data Pd = Pe x (1-ηL) Heat sink to ambient thermal resistance R hs-amb (°C/W) Heat sink to ambient temperature rise T hs-amb (°C) ModuLED Micro 8630 ModuLED Micro 8650 ModuLED Micro 8680 ModuLED Micro 8630 ModuLED Micro 8650 ModuLED Micro 8680 Dissipated Power Pd(W) 5 2.4 2.4 2.0 12 12 10 10 2.2 2.0 1.7 22 20 17 15 2.0 1.8 1.53 30 27 23 20 1.9 1.7 1.4 38 34 28 25 1.84 1.6 1.36 46 40 34 30 1.76 1.53 1.3 53 46 39 35 - 1.48 1.25 - 52 44 40 - 1.45 1.2 - 58 48 45 - - 1.17 - - 53 10 20 30 40 45 5 10 30 20 40 50 60 15 25 35 Heat sink to ambient temperature rise T hs-amb (°C) ModuLED Micro 8630 ModuLED Micro 8650 ModuLED Micro 8680 Dissipated Power Pd (W) Heat sink thermal resistance, Rhs-amb (°C/W) Dissipated Power Pd (W) Heat sink length (mm) 0 60 100 40 20 80 120 1.3 25 2.2 40 1.0 20 1.9 35 1.6 30 2.5 45 Rhs-amb Pd ModuLED Micro performance data at a heat sink to ambient temperature difference, ΔT hs-amb, of 50 °C The thermal performance of a LED cooler, expressed as Thermal Resistance Rth in K/W (or °C/W) tells you how many degrees Kelvin (or Celsius) the base of the LED cooler will incline per Watt of dissipated power Pd. This dissipated power Pd is the heat loss a LED package or LED COB/LOB will create besides the efficient light generation. Typically for white LED packages the efficiency varies with the color CCT and the CRI – values here below can be taken as a rule of thumb for white LED packages (phosphor corrected blue light) CCT 4000 - 7000 and CRI 70 - 80 –> 35% efficiency –> 65% heat loss CCT 2700 - 3000 and CRI 85 - 97 –> 30% efficiency –> 70% heat loss For other LED packages like horticulture specific wave lengths or UV, we recommend you to look up the thermal efficiency in the datasheet or contact the supplier. Keep in mind that for horticulture LED packages, example 660nm Deep Red, the thermal losses are drastically lower and can be as low as 40%, meaning you could almost use double the electrical power Pe on the same LED cooler for the same temperature rise dT. Next the Thermal Resistance Rth is not a fix value – the nominal value we declare corresponds with a 50°C temperature rise – The table below explains the thermal resistance Rth for various dissipated power values. In this way you can completely predict the temperature you are going to get in your LED luminaire. Difficulties figuring it out – just let us know and our engineers will do the math for you. ModuLED Mic r o Modular Passive Star LED Cooler ø86mm
Transcript of ModuLED Micro Modular Passive Star LED Cooler …...Heat sink thermal resistance, Rhs-amb ( C/W)...
No.818, Dashun 2nd Rd., Sanmin Dist., Kaohsiung City 80787, [email protected] www.led-heatsink.com www.mechatronix-asia.comTel: +886-7-381-5892 Fax: +886-7-383-9293 VAT: 28600841
ø86 x H30 / 50 / 80 (mm)Rth 1.8 - 1.5 - 1.2 °C/WPower Pd 28 - 33 - 42 W
Thermal Data
Pd = Pe x (1-ηL)
Heat sink to ambientthermal resistance
Rhs-amb (°C/W)
Heat sink to ambienttemperature rise
Ths-amb (°C)
ModuLED Micro 8630
ModuLED Micro 8650
ModuLED Micro 8680
ModuLED Micro 8630
ModuLED Micro 8650
ModuLED Micro 8680
Diss
ipat
ed P
ower
Pd(
W)
5 2.4 2.4 2.0 12 12 10
10 2.2 2.0 1.7 22 20 17
15 2.0 1.8 1.53 30 27 23
20 1.9 1.7 1.4 38 34 28
25 1.84 1.6 1.36 46 40 34
30 1.76 1.53 1.3 53 46 39
35 - 1.48 1.25 - 52 44
40 - 1.45 1.2 - 58 48
45 - - 1.17 - - 53
10 20 30 40 45510
30
20
40
50
60
15 25 35
Heat sink to ambient temperature rise Ths-amb (°C) ModuLED Micro 8630 ModuLED Micro 8650 ModuLED Micro 8680
Dissipated Power Pd (W)
Heat
sink
ther
mal
resis
tanc
e, R
hs-a
mb
(°C/W
)
Diss
ipat
ed P
ower
Pd
(W)
Heat sink length (mm)0 60 1004020 80 120
1.3 25
2.2 40
1.0 20
1.9 35
1.6 30
2.5 45
Rhs-ambPd
ModuLED Micro performance data at a heat sink to ambient temperature difference, ΔThs-amb, of 50 °C
The thermal performance of a LED cooler, expressed as Thermal Resistance Rth in K/W (or °C/W) tells you how many degrees Kelvin (or Celsius) the base of the LED cooler will incline per Watt of dissipated power Pd. This dissipated power Pd is the heat loss a LED package or LED COB/LOB will create besides the efficient light generation. Typically for white LED packages the efficiency varies with the color CCT and the CRI – values here below can be taken as a rule of thumb for white LED packages (phosphor corrected blue light)
CCT 4000 - 7000 and CRI 70 - 80 –> 35% efficiency –> 65% heat loss CCT 2700 - 3000 and CRI 85 - 97 –> 30% efficiency –> 70% heat loss
For other LED packages like horticulture specific wave lengths or UV, we recommend you to look up the thermal efficiency in the datasheet or contact the supplier. Keep in mind that for horticulture LED packages, example 660nm Deep Red, the thermal losses are drastically lower and can be as low as 40%, meaning you could almost use double the electrical power Pe on the same LED cooler for the same temperature rise dT.
Next the Thermal Resistance Rth is not a fix value – the nominal value we declare corresponds with a 50°C temperature rise – The table below explains the thermal resistance Rth for various dissipated power values. In this way you can completely predict the temperature you are going to get in your LED luminaire.
Difficulties figuring it out – just let us know and our engineers will do the math for you.
ModuLED Micro Modular Passive Star LED Cooler ø86mm
