TPS55010EVM-009: own current consumption

Mads Holmer81

Part Number: TPS55010EVM-009
Other Parts Discussed in Thread: TPS55010

I have just tested the TPS55010 Evalboard. In idle-mode, only supply (5V) connected I measure input current 75 mA.

With 50mA load, I measure input current 128 mA @ Vin=5V. That do not comply with the high efficiency specified in the Evalboard documentation.

The eval board, is direct from the box, no modification. If measure with thermal camera, the heat is generated in the IC.

over 6 years ago

0 JohnTucker over 6 years ago

TI__Guru**** 191445 points

At 50 mA load, the input current should be about 60 mA at 5 V input. How are you measuring the current? Can you tell us about your test set up?

0 Mads Holmer81 over 6 years ago in reply to JohnTucker

Prodigy 70 points

The set-up is very simple a DC power supply, a multimeter i current mode and a 100 ohm resistor.
I have tried another eval board, that have the expected result/efficiency. So the problem is related to the first eval board.
Thank you for the quick response

0 JohnTucker over 6 years ago in reply to Mads Holmer81

TI__Guru**** 191445 points

I can tell you that the post manufacturing tests for the EVMs are simple checkouts. They are not tested for efficiency. I may have an additional comment later.

0 Mads Holmer81 over 6 years ago in reply to JohnTucker

Prodigy 70 points

I have reviewed my measurements and concluded that the eval board was first destroyed when my DC supply reach the current limit. Maybe a over voltage peak.

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TPS55010EVM-009: own current consumption