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Tool/software:
Hi,
After testing the Eval Board with TPS22992, I have noticed that the TPS22992 does not achieve the specified Ron.
In the data sheet it is specified at 25°C and 3.3V with typ 8.7mR. At 85°C with max 12mR.
But I measure 13mR or 16mR.
What could be the reason for that ?
Best regards,
Dardan
Hello Dardan,
There can be slight difference in RDSON.
How are you testing the RDSON? Can you please explain the test methodology?
Thanks
Amrit
Hello,
Mr. Kolukaj kindly made this request for me.
I am using the test setup as described in the TPS22992 Evaluation Module User's Guide section 6.1. I measure the load current and measure the voltage drop at the sense connections TP2 and TP6.
I took a closer look at the PCB layout. I noticed that the sense connections are not connected directly to the pins of U1. You also measure the voltage drop that occurs on the 2 approx. 1.5mm long copper tracks.
With a copper thickness of 35um and a width of 0.25mm, these tracks each have a resistance of 3 mOhm.
I think this explains the deviation of the measured value for Ron.
Many thanks for your support
Olaf