ElmoMC Power Supplies-TAM-20 - Manual (Page 29)

Tambourine 20 Power Supply Installation Guide
MAN-TAMIG (Ver. 1.501)
|Heat Dissipation| www.elmomc.com
29
Table of Contents
3.5 Heat Dissipation
For full power output capability the Tambourine 20 is designed to be mounted on an external heat-
sink. It is highly recommended that the “Wall” on which the Tambourine 20 is mounted will have
heat dissipation capabilities. The Tambourine 20 at “free air convection” (without an additional
heat-sink) can dissipate around 12 W for 40°C ambient temperature and not exceeding 85 °C on the
heat sink.
When “Free Air Convection” is sufficient for the application it is recommended to leave
approximately 10 mm of space between the Tambourine 20's heat sink and any other assembly.
When attaching to an external heat-sink, it is recommended to use N5-N7 surface treatment and
thermal foil or smearing thermal compound.
3.5.1 Tambourine 20 Thermal Data
• Free air convection thermal resistance (θ): Approximately 5 to 6°C/W.
• Thermal time constant: Approximately 20 minutes/ 1200 seconds (thermal time constant
means that the Tambourine 20 will reach 2/3 of its final temperature after 20 minutes).
• Self-heat dissipation capability (no external heat sink): 12 W for 40°C/W temperature rise.
• The thermal resistance when connecting to an external heat sink using a thermal conductive
compound/foil. By proper smearing of the surface a significant improvement of the thermal
resistance is achieved: 0.03°C/W.
3.5.2 Heat Dissipation Data
Heat Dissipation is shown graphically below:
Figure 10: Dissipation versus Current Graph