Sony TA-VE170 Active Heatsink

Achieved by an active cooling system, the thermal management consists of a simple aluminium heatsink, and a small fan attached to it.

It is an aluminium duct with vent holes at one end and a fan at the other.

Here is a view showing how thick the fan is. I have seen similar constructions in computer routers. IT equipment tends to employ cooling fans such as these.

Here is the audio power output IC. In total there are four SI 18752 chips, and one SI 18751 chip.

On the audio side of the PCB, there are two of these IC chips fitted to the active heatsink. The other side of the heatsink has three fitted in the same way.

Here is a view showing how the audio power outputs ICs attach to the heatsink.

Here is another view showing the heatsink with a square cross section.

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