AOC LM740 Specifications download pdf (Page 15)

Philips Fortimo HBMt Gen 3 System Design In Guide 15

Thermal management

The critical thermal management points for the module and driver are set out in

this chapter in order to facilitate the design-in of the Fortimo LED HBMt Gen3.

Keeping these thermal points in mind will help to ensure the optimal performance

and lifetime of the system.

Table 16. Thermal denitions

Module temperature

To achieve typical product lifetime characteristics, it is critical to ensure that the

product is operating within specied temperature limits. These limits depend on

both the product and the application, including luminaire design and maximum

rated luminaire ambient temperature.

Item Description Symbol Unit

Ambient temperature Temperature of the air

surrounding the luminaire in

the test environment or

application

Tamb °C

Maximum rated luminaire

ambient temperature

Maximum rated luminaire temperature of

the air surrounding the luminaire in the

application

Tmax.amb °C

Case temperature The representative

temperature of a module or

driver, dened at a specic

position on the module or

driver

Tcase °C

Module temperature The temperature measured at

the specied Tcase position on

the module

- °C

Driver temperature The temperature measured at

the specied Tcase position on

the driver

- °C

Delta T The maximum temperature

difference between Tcase and

Tmax.amb

∆ T °C

Note: In order to ensure accurate Tcase test results, the case temperature should not

vary by more than 1° C for a period of at least 30 minutes after a stable temperature

has been achieved.

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AOC LM740 Specifications Page 15

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