MCS1806GS-3-50-Z thermal resistance

Motor Drivers/Sensors
1

Could someone help me find information about the thermal resistance of the MCS1806GS-3-50-Z?

2

Hello,

I can see that this isn’t posted in the datasheet as it usually is. Let me speak to my colleagues and get back to you on this.

Best,

Krishan

3

Since the main thermal path is through the pins themselves, thermal resistance is highly dependent on the PCB layout. The amount of copper and how many layers in the PCB would help determine this.

This is why there is no exact numbers on the MCS1806 datasheet. Hope this helps.

Best,

Krishan

4

Thanks Krishan!

But I still have an issue. I’m doing the product certification tests and the temperature measure was done over the case. I need to check the junction temperature but I don’t want to repeat the test.

Is there a way to determine the junction temperature considering the case temperature?

5

Good question,

You would have needed to apply a constant current for long enough that the PCB, busbar, and junction reached a steady-state temp. That would take minutes and the actual time would depend on the current and the PCB layout.

Can I have you submit a ticket in order to get you direct FAE support here? The reason for this is because we could try to model it, but we would need to verify if this test would even be valid for our model.

Here is the following link:
Contact MPS - Design Assistance Contact

Best,

Krishan