ISL8225M 110A Thermal Performance

Added on December 03, 2012
Watch the demo of three ISL8225M operating in multi-phase current sharing mode for delivering up to 110A output current with no fans or heat sinks.

Related Resources

ISL8225M Datasheet ISL8225M Datasheet

isl8225m.pdf (1.03 MB)
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Video Transcript

Today I'd like to talk to you about Intersil's power modules, specifically our ultra dense, super smart ISL8225M and the ISL8225M evaluation board where we have three of our power modules hooked up in parallel, each providing a minimum of 30 amps to enable us to have a 90 amp plus system solution.

We have 12 volts on the input, with our output we're running one volt out and 90 amps worth of output current. Under a room temp operating condition with no heat sinks, no airflow, you can see that our cool running parts are only running 77 degrees C at the hottest power module in this application, very efficient.

So under these conditions, you don't need a heat sink, you don't need airflow and yet a very low overall system temperature operating level. If you do have system operating at extended temperatures in a hot environment and you do have airflow available, you can see that there's going to be significant improvement in the overall thermal performance of these products. In this case, we'll take a fan calibrator for 200 LFM, apply airflow and we'll see just how far down our temperature drops.

Now let's look at our same system with no airflow, no heat sinks, and have it running at 100 amps which is a 110% of rated power levels. In this case, our temperature is still a very cool 83 degrees running at that 100 amp level. Let's have a look at what the benefit is of having a 200 LFM airflow, again with no heat sinks.

And lastly, we'll again look at our eval board with no heat sinks, no airflow, 12 volts in, one volt out but this time running at 110 amps or 120% of rated power for the individual modules. Even at 110 amps, we're only running at 91 degrees C. Still a very cool temperature given this power level, no airflow, no heat sinks.

Now again, if you have a high operating environment, we will quantify the impact of a 200 LFM airflow with no heat sinks. The 8225 is capable of having up to six modules operating in parallel with Intersil's proprietary current sharing algorithms. That will provide 180 amps of continuous power.

Should you like to get a sample of this evaluation board or the ISL8225 modules, please go online to intersil.com, order today.