Part Number:TPS63060
Hello,
I am trying to build a TEC driver similar to this Application Report: www.ti.com/lit/an/slva677/slva677.pdf
My input voltage is in the range of 8V to 12V, so I can not use the same converter as in the report. Instead I built it with the TPS63060 as I thought they would behave alike.
In boost mode everything works fine, current output up to 200mA -- more is not necessary and not tested.
Buck mode on the other hand does not work. TEC current has a maximum of around 30mA, feedback voltage diverges from the 0.5V reference. Setting the output voltage without load works. After double checking everything I do now think that the problem might originate in TPS63060 current limiting or something similar that prevents operating as current sink in buck mode.
Is my assumption, that the TPS63060 is not capable of sinking current in buck mode, correct? If so, what other part can you recommend for the job?
Thank you!