3.11 Heat Dissipation

3.11.1 Ocarina

The best way to dissipate heat from the Ocarina is to mount it so that its heatsink faces up.
For best results leave approximately 10 mm of space between the Ocarina's heatsink and any
other assembly.

3.11.1.1 Thermal Data

• Heat dissipation capability (θ): Approximately 10 °C/W.
• Thermal time constant: Approximately 240 seconds (thermal time constant means
that the Ocarina will reach 2/3 of its final temperature after 4 minutes).
• Shut-off temperature: 86 °C – 88 °C (measured on the heatsink)

3.11.1.2 Heat Dissipation Data

Heat Dissipation is shown in graphically below:
Whistle - 60 Series Pow er Dissipati on
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0
0.75
1.5
2.25
3
3.75
4.5
5.25
6
6.75
7.5
8.25
9
9.75
Peak Current (A)
Power Dissip ation (Watt
s
50V
40V
30V
20V
Standard 40 °°°°C Ambient Temp.External HeatsinkRequiredHeatsinknot Required

Ocarina

Ocarina/Castanet Installation Guide Installation
MAN-OCSIG (Ver. 1.2)
3-12