Other Parts Discussed in Thread: TIDA-050017, TPS63802
I'm investigating using the TPS63036 as a TEC controller as described in Ti design guide TIDA-050017 .
the design guide uses the TPS63802. I've changed to the TPS63036 for smaller footprint size.
In testing using the TPS63036 EVM board I see good performance when the 63036 is sourcing current - Vout = 5.2V, load = 4ohm (simulating TEC), other side of load = 3.3V
But when sinking current - Vout = 1.5V (can't go lower) , other side of simulated TEC is 3.3V. the minimum load I can do is ~10ohms and probably that is already too low. In sinking current the max current appears to be less than 200mA across the load.
Is this expected? Is there a significant difference between the TPS63802 and 63036 that would account for reduced sink performance? the design guide mentions there is a difference between sink/source performance so want to verify what I could expect.
Thanks,
Roy
