Hi!
We designed a home IoT alarm system and for the External warning device we are using the TPS62152 buck regulator as a power supply.
Our input voltage is 12V(8x AA battery in series).
We are trying to verify the power supply efficiency of our design and the problem is that we got really low efficiency values on light loads, please see table below.
The voltages seems to be good, the device is working perfectly, but the measured efficiency is lower than expected from datasheet.
We measured the efficiency by isolating the buck regulator from other components of the board.
Here is a picture of loaded start(120mA) it seems to be good too.
We suspect on the measuring method and/or equipment.
Are you able to measure us a sample to verify the efficiency?
Our measuring method:
Power supply ------current probe-------DUT input----Isolated psu----DUT output-----current probe------constant load(resistor).
Thank you in advance!
Kind Regards,
Lajos
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